WO2022193525A1 - Method for manufacturing metal support plate for fuel cell - Google Patents

Abstract

The present invention relates to a method for manufacturing a metal support plate for a fuel cell. The method sequentially comprises the following steps: 1) using one of sintered stainless steel, heat-resistant steel, a nickel-based alloy, a cobalt-based alloy, a titanium alloy and a chromium-based alloy; 2) sieving the powder in step 1), wherein the particle size of the selected powder is 13-250 μm; 3) placing the powder into an inner hole of a measuring vessel, removing excess powder, and then placing the measuring vessel on a bearing plate; 4) sintering the bearing plate on which the measuring vessel is placed; 5) coating the upper surface of a metal substrate with an anode slurry to form an anode layer on the upper surface of the metal substrate; 6) coating the upper surface of the anode layer with an electrolyte slurry to form an electrolyte coating on a surface of the anode layer; and 7) coating the upper surface of the electrolyte coating with a cathode slurry to form a cathode layer on the upper surface of the electrolyte coating, so as to prepare a metal support plate. Sintering deformation is eliminated, and the binding tightness between the anode layer and the metal substrate is improved.

Description

A kind of manufacturing method of metal support plate for fuel cell technical field

The invention belongs to the technical field of fuel cells, and in particular relates to a method for manufacturing a metal support plate for fuel cells.

Background technique

Solid oxide fuel cell is an ideal fuel cell, which not only has the advantages of high efficiency and environmental friendliness of fuel cells, but also has the following outstanding advantages:

(1) The solid oxide fuel cell is an all-solid structure, and there is no corrosion problem and electrolyte loss caused by the use of a liquid electrolyte, and it is expected to achieve long-life operation. (2) The working temperature of solid oxide fuel cells is 800-1000 °C. Not only does the electrocatalyst not need to use precious metals, but also natural gas, coal gas and hydrocarbons can be directly used as fuels, which simplifies the fuel cell system. (3) The high-temperature waste heat discharged from the solid oxide fuel cell can form a combined cycle with a gas turbine or a steam turbine, which greatly improves the overall power generation efficiency.

At present, traditional solid oxide fuel cells mostly use ceramic materials or metal-ceramic composite materials as supports. Ceramic materials are not easy to be machined, and have poor thermal shock resistance and welding performance, which are not conducive to the assembly of fuel cell (SOFC) stacks. Metal-supported solid oxide fuel cells (MS-SOFC) (as shown in Figure 1) use metals or alloys as the support SOFC for fuel cells. Compared with SOFC, MS-SOFC has its unique advantages: (1) Low cost: The cost of metal materials is much lower than that of metal-ceramic composite materials; (2) Fast start-up: The good thermal conductivity of metal can reduce the temperature gradient inside the battery and achieve fast start-up, so that it can be used in the mobile field; (3) Processability: Compared with ceramics, metal materials have better processability, which will greatly reduce the difficulty of SOFC processing; (4) Ease of sealing: The welding and sealing technology of metal materials can avoid the problem of difficult sealing of SOFC. The main function of the metal support is to transport gas, conduct current, and provide stable structural support for the battery. When MS-SOFC uses hydrocarbon fuel, the metal support can be used as an in-situ reforming layer. The hydrocarbon fuel takes the lead in chemical reformation in the metal support, and the generated synthesis gas undergoes electrochemical oxidation in the anode functional layer. The structural design can enhance the anti-carbon deposition performance of the anode and improve the long-term stability of the battery in hydrocarbon fuels. MS-SOFC is not only suitable for traditional solid oxide fuel cell (SOFC) applications, such as stationary power stations, backup power supplies and charging piles, etc., but also as a range extender for mobile devices such as heavy-duty vehicles or electric vehicles.

The current metal-supported solid oxide fuel cells, such as the Chinese invention patent application "Method for the Preparation of Porous Metal-supported Low-Temperature Solid Oxide Fuel Cells", whose patent application number is CN200610118649.9 (application publication number CN1960047A) discloses a For the preparation method of the porous metal-supported low-temperature solid oxide fuel cell, NiO-ScSZ (or CGO) is selected as the raw material of the support body to prepare the support body, and the process is complicated and the manufacturing is difficult.

In addition, at present, the Fe-Cr alloy support, anode and electrolyte blank prepared by casting are laminated and then sintered at high temperature in a reducing atmosphere. The anode catalyst is injected into the metal support side of the half-cell, and the surface of the electrolyte is screened. The cathode layer was printed, and the anode and cathode were sintered in situ during battery testing. This process effectively avoids the diffusion of metal elements at high temperature. However, the in-situ sintering temperature is too low, the bonding strength of the interface between the cathode and the electrolyte is low, and the battery performance is attenuated. The porous metal body with anode and electrolyte is prepared by co-casting method. Due to the different sintering temperature of metal and electrolyte, this material is prone to sintering deformation and peeling of anode or electrolyte layer. The metal support body and the micro-tubular metal support body are prepared by the dry pressing method. Due to the thin metal support layer, the metal support plate is prone to uneven thickness after dry pressing, resulting in inconsistent sintering deformation and affecting the bonding between the anode, electrolyte, etc. and the substrate; and the metal thickness of the micro-tubular metal support body is not easy to achieve uniform control. , affecting the combination with the anode, etc.

Fe-based alloys and Ni-based alloys are used as metal supports for MS-SOFC. Due to the large difference between the thermal expansion coefficient of Ni-based alloys and electrolyte materials, during battery operation, the internal thermal stress is too large, and cracks are likely to occur, and even the electrolyte layer is peeled off. ; The pure Ni support has poor anti-oxidation performance and is easy to agglomerate and coarsen, which makes the SOFC performance attenuate sharply. These shortcomings of Ni-based alloys seriously hinder their application in SOFC supports; while Fe-based alloys are used as supports, especially ferritic stainless steel, although ferritic stainless steel has a high temperature thermal expansion coefficient CTE (11×10 ^-6 ~ 13×10 ^-6 K ^-1 ) is very close to YSZ (yttria-stabilized zirconia) and GDC (Gd ₂ O ₃ doped CeO ₂ ) (13×10 ^-6 ～14×10 ^-6 K ^-1 ) electrolytes , but long-term work in a medium-high temperature and humid atmosphere can easily lead to the oxidation of metal materials and the interdiffusion of Fe and Cr elements in the stainless steel support and the Ni-based anode. During the preparation or operation of MS-SOFC, the Fe and Cr elements in the support diffuse into the anode, and oxides are formed during the operation of the battery, which leads to the rapid degradation of the battery performance; at the same time, the Ni element in the anode diffuses into the stainless steel support. In the process, the thermal expansion coefficient of the support body changes, the internal stress of the battery increases, and the structural stability decreases.

Therefore, there is a need to further improve the existing methods for preparing metal support plates for fuel cells.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a method for manufacturing a metal support plate for a fuel cell that eliminates sintering deformation and improves the bonding between the anode and the substrate in view of the current state of the prior art.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a method for manufacturing a metal support plate for a fuel cell, which is characterized in that the following steps are included in sequence:

1) Use one of sintered stainless steel, heat-resistant steel, nickel-based alloy, cobalt-based alloy, titanium alloy, and chromium-based alloy;

2) sieve the powder in step 1), and select the powder particle size to be 13-250um;

3) Place the powder in the inner hole of the measuring device, remove the excess powder, and place it on the setter plate;

4) Sinter the setter plate on which the measuring device is placed, the powder in the measuring device forms a metal substrate, and flatten the metal substrate;

5) Coating the anode slurry on the upper surface of the metal substrate, then placing the uncoated lower surface of the metal substrate on the setter, and sintering after drying, thereby forming an anode layer on the upper surface of the metal substrate;

6) Coating the electrolyte slurry on the upper surface of the anode layer, then placing the uncoated lower surface of the metal substrate on the setter, and sintering after drying to form an electrolyte coating on the upper surface of the anode layer ;

7) Coating the cathode slurry on the upper surface of the electrolyte coating, then placing the uncoated lower surface of the metal substrate on the setter, and sintering after drying, thereby forming a cathode on the upper surface of the electrolyte coating layer to make a metal support plate.

In order to reduce the pores of the metal support plate, a wax dipping process is performed between steps 4) and 5), that is, the metal substrate of the required size is placed in the wax melt for 1 to 30 minutes, and the pores in the metal substrate are to be infiltrated with wax. After melting, the metal substrate is taken out and cooled.

Preferably, in step 3), the upper surface of the setter plate is covered with metal fiber felt cutting pieces with a porosity greater than 50%, and the measuring device with the powder is placed above the metal fiber felt cutting pieces. After sintering A metal substrate with a double-layer structure is formed, and the double-layer structure includes a fiber mat layer and a sintered powder layer arranged one above the other. Laying the metal fiber felt underneath can reduce the sintering deformation, and at the same time, the porosity and strength of the metal fiber are high, which is beneficial for the gas to enter the anode and support the anode.

The component content of the metal fiber felt has various forms, preferably, the metal fiber felt, in terms of mass percentage, includes the following components: carbon: ≤0.06%, nickel: 0-25%, molybdenum: 0-4%, Chromium: 10 to 30%, Niobium: 0 to 3%, Aluminum: 0 to 10%, Titanium: 0 to 3%, Silicon: 0 to 1%, Manganese: 0 to 2%, unavoidable not exceeding 2% Impurities, iron: balance. The metal felt has better bonding with the powder and can improve the strength of the support plate.

Preferably, sintered stainless steel is selected in step 1), and the components of the sintered stainless steel, in terms of mass percentage, include the following components: carbon: ≤0.06%, nickel: 0-25%, molybdenum: 0-4%, chromium: 10～30%, Niobium: 0～3%, Aluminum: 0～10%, Titanium: 0～3%, Silicon: 0～1%, Manganese: 0～2%, unavoidable impurities not exceeding 2%, Iron: surplus. Using this metal powder, after sintering, the combination with the anode is good, and the thermal expansion coefficient is matched.

Preferably, in step 4), the sintering temperature is 1000° C.˜1350° C., the sintering time is 5˜240 min, and the vacuum degree is 10 ⁻³ Pa˜10 ² Pa.

Specifically, the sintering temperature in step 5) is 1050°C-1400°C, the sintering time is 10-300min, the sintering temperature in step 6) is 1000°C-1400°C, the sintering time is 10-300min, and in step 7) The sintering temperature used in the sintering is 800℃～1200℃, the sintering time is 5～300min, and the vacuum degree is 10 ^-3 Pa～10 ² Pa.

Preferably, the anode slurry contains NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT, and also includes yttria-stabilized zirconia and One of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _{6 -δ} (x=0, 0.1, 0.3, 0.5). Conducive to the production of battery reactions.

Preferably, the electrolyte slurry includes butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG, glutamic acid PHT, and also includes yttria-stabilized zirconia and LaGaO ₃ -based electrolytes , one of Ba(Sr)Ce(Ln)O ₃ and CeO ₂ -based solid electrolytes. The thermal expansion coefficient of this electrolyte slurry is close to that of the anode and cathode, and the combination is better after sintering.

Preferably, the cathode slurry is Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ , LSM (La _1-x Sr _x Mn0 ₃ ), LSCF ((La, Sr)(Co, Fe)O ₃ ), one of A ₂ Ru ₂ O _7-x (A=Pb, Bi) ceramics with pyrochlore structure, Ag-YDB composite ceramics and L-type ceramics with perovskite structure, the aforementioned x=0, 0.1, 0.3, 0.5. This cathode material is tightly bound to the electrolyte layer.

Compared with the prior art, the present invention has the advantages that the preparation method of the metal support plate for the fuel cell is simple in process, can realize mass production of the metal support plate without a mold, reduces the production cost and improves the production efficiency; The sintering deformation of the metal support plate can be effectively reduced by the restraint of the metal fibers, and at the same time, the deformation can be effectively reduced by matching the thermal expansion coefficient between the anode, the electrolyte and the cathode. The sintering deformation is eliminated, and the bonding tightness between the anode layer and the metal substrate is improved. The loose sintering of metal fiber felt and powder is adopted, which has high strength and controllable sintering deformation. Compared with the support plate using sheet metal, the density is lower and the weight is lighter, which is conducive to achieving light weight. However, the support plate prepared from the metal plate needs to be subjected to multiple coating treatments, and the cost is high, and the cost of the present invention is relatively low. In addition, through the wax dipping process, the pores of the metal substrate can be controlled to ensure that the gas can easily pass through the metal substrate.

Description of drawings

1 is a cross-sectional view of a metal support plate fuel cell structure of an embodiment;

Fig. 2 is the SEM image of the fracture surface after sintering in Example 1;

3 is a cross-sectional metallographic diagram after sintering in Example 1;

Fig. 4 is the topography of the metal fiber felt surface after sintering in Example 1;

FIG. 5 is a pore morphology diagram after sintering in Example 5;

Figure 6 is a pore topography diagram after flattening in Example 5;

FIG. 7 is a pore morphology diagram after sintering in Example 6;

FIG. 8 is a pore morphology diagram after flattening in Example 6. FIG.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings:

Example 1:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials: 434L stainless steel powder is selected as the material. In terms of mass percentage, 434L stainless steel includes the following components: C: 0.025%, Cr: 17.5%, Mn: 0.8%, Si: 0.6%, Mo: 1.05%, iron :margin;

2) The above powder is sieved, the particle size range is 150 mesh to 200 mesh, and the powder bulk density is 2.35 g/cm ³ .

3) The setter is a ceramic containing 95% alumina;

4) Powder laying: another part of the material is selected as metal fiber felt. According to the mass percentage, the metal fiber felt includes the following components: C: 0.015%, Cr: 18.5%, Mn: 0.6%, Si: 0.3%, Ni: 10.1 %, iron: balance; porosity 80%, thickness 0.1mm; then cut the metal fiber felt to 125×125mm, and put the cut metal fiber felt on the setter plate, and then pour the powder in step 2). Into the inner hole of the measuring device, remove the excess powder, and place the measuring device with the powder on the metal fiber felt of the setter; the inner hole size of the above-mentioned measuring device is 120×120mm, and the thickness is 0.15mm. The measuring device is an existing measuring device, which will not be described in detail in this embodiment; that is, when the area of the metal fiber felt is S1, the inner hole area of the measuring device is S2, and S1=(1.01-1.5)S2.

5) Sintering: sinter the setter plate with the measuring device at a sintering temperature of 1250° C. for 120 minutes, the sintering atmosphere is argon gas with vacuum backflushing of 3×10 ⁴ Pa, the metal powder particles and metal fiber felt in the measuring device Sintering to form a metal substrate, the metal substrate has a double-layer structure, and the double-layer structure includes a fiber mat layer and a sintered powder layer arranged up and down, and then the metal substrate material is taken out.

6) Flattening: place the sintered metal substrate material between two flat templates, apply pressure, and press the height to 0.65mm, and the density after pressing is 4.7g/cm ³ .

7) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate 4 by screen printing or dip coating, and the uncoated lower surface of the metal substrate 4 is placed on the setter plate. The anode layer 2 is formed on the upper surface of the metal substrate 4 by drying. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _{6- δ} (x=0), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

8) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes yttria-stabilized zirconia electrolyte, methyl ethyl ketone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

9) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate for drying, so that a cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, as shown in FIG. 1 for details.

The SEM photo of the flattened fracture is shown in Figure 2, the metallographic phase of the pores after sintering is shown in Figure 3, and the surface morphology of the metal fiber felt after sintering is shown in Figure 4. It can be seen from Figures 2 to 4 that the metal powder particles are closely combined with the metal fiber felt.

Example 2:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 430L stainless steel powder. According to the mass percentage, 430L stainless steel includes the following components: C: 0.025%, Cr: 17.2%, Mn: 0.9%, Si: 0.5%, iron: balance;

2) The above powder is sieved, the particle size is 200-320 mesh, and the powder bulk density is 2.25 g/cm ³ .

3) The setter plate is a ceramic plate containing 95% alumina;

4) Powder laying: another part of the material is selected as metal fiber felt. According to the mass percentage, the metal fiber felt includes the following components: C: 0.015%, Cr: 17.5%, Mn: 0.6%, Si: 0.3%, Ni: 13.4 %, Mo: 2.46%, Iron: balance; the porosity of the metal fiber felt is 60%, and the thickness is 1.1 mm; then the metal fiber felt is cut to 125 × 125 mm, and the cut metal fiber felt is placed on the setter Then pour the powder in step 2) into the inner hole of the measuring device, remove the excess powder, and place the measuring device with the powder on the metal fiber felt of the setter; the size of the inner hole of the measuring device is It is 120×120mm and the thickness is 1.0mm; that is, when the area of the metal fiber felt is S1, the area of the inner hole of the measuring device is S2, and S1=(1.01～1.5)S2;

5) Sintering: Sinter the setter plate with the measuring device at a sintering temperature of 1200 ° C for 120 minutes, the sintering atmosphere is 10vol% argon + 90% hydrogen, and the metal powder particles and metal fiber felt in the measuring device are sintered to form metal The base plate 4, the metal base plate 4 has a double-layer structure, and the double-layer structure includes a fiber mat layer and a sintered powder layer arranged up and down, and then the metal base plate 4 is taken out.

6) Flattening: place the sintered metal substrate 4 between two flat templates, apply pressure, and press to a height of 1.45 mm, and the density after pressing is 5.0 g/cm ³ .

7) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate 4 by screen printing or dip coating, and the uncoated lower surface of the metal substrate 4 is placed on the setter plate. The anode layer 2 is formed on the upper surface of the metal substrate 4 by drying. The aforementioned anode slurry includes yttria-stabilized zirconia YSZ, NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

8) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes yttria-stabilized zirconia electrolyte, methyl ethyl ketone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

9) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

Example 3:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 434L stainless steel powder. According to the mass percentage, 434L stainless steel includes: C: 0.025%, Cr: 17.5%, Mn: 0.8%, Si: 0.6%, Mo: 1.05%, iron: more quantity;

2) sieve the above-mentioned stainless steel powder, select a particle size of 100-150 mesh, and a powder bulk density of 2.55g/cm ³ .

3) The setter plate is a ceramic plate containing 95% alumina;

4) Powder laying: another part of the material is metal fiber felt. According to the mass percentage, the metal fiber felt includes the following components: C: 0.015%, Cr: 17.2%, Mn: 0.9%, Si: 0.5%, porosity 60% , iron: surplus; the thickness of the metal fiber felt is 0.4mm; then the metal fiber felt is cut to 125×125mm, and the cut metal fiber felt is placed on the setter plate, and then the powder in step 2) is poured Into the inner hole of the measuring device, remove the excess powder, and then place the measuring device with the powder on the metal fiber felt of the setter plate; the size of the inner hole of the measuring device is 120 × 120mm, and the thickness is 0.7mm;

5) Sintering: Sinter the setter plate with the measuring device at a sintering temperature of 1300° C. for 60 minutes, wherein the sintering atmosphere is 10 vol% argon gas + 90% hydrogen gas, and the metal powder particles and metal fiber felt in the measuring device are sintered to form Metal substrate 4, the metal substrate 4 is a double-layer structure, and the double-layer structure includes a fiber mat layer and a sintered powder layer arranged up and down, and then the metal substrate is taken out.

6) Flattening: place the sintered metal substrate 4 between two flat templates, apply pressure, and press the height to 1.0 mm, and the density after pressing is 4.5 g/cm ³ .

7) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate 4 by screen printing or dip coating, and the uncoated lower surface of the metal substrate 4 is placed on the setter plate. The anode layer 2 is formed on the upper surface of the metal substrate 4 by drying. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _{6- δ} (x=0.5), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

8) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes CeO2 _- based solid electrolyte, methyl ethyl ketone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

9) Cathode layer preparation: Cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.5) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3 after drying the uncoated lower surface on a setter plate.

Example 4:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 434L stainless steel powder. According to the mass percentage, the 434L stainless steel powder includes the following components: C: 0.025%, Cr: 17.5%, Mn: 0.8%, Si: 0.6%, Mo: 1.05%, iron: surplus;

2) The above powder is sieved, the particle size is selected to be 325-500 mesh, and the bulk density of the powder is 2.15 g/cm ³ .

3) The setter plate is a ceramic plate containing 95% alumina;

4) Powder laying: the other part uses metal fiber felt. According to the mass percentage, the metal fiber felt includes the following components: C: 0.06%, Cr: 21.1%, Mn: 0.9%, Si: 0.3%, Al: 4.79%, Iron: surplus; the porosity of the metal fiber felt is 65% and the thickness is 0.2mm; then the metal fiber felt is cut to 125×125mm, and the cut metal fiber felt is placed on the setter; then the The powder is poured into the inner hole of the measuring device, the excess powder is removed, and then the measuring device with the powder is placed on the metal fiber felt of the setter plate; the size of the inner hole of the measuring device is 120×120mm, and the thickness is 0.3mm;

5) Sintering: Sinter the setter with the measuring device at a sintering temperature of 1200° C. for 60 minutes. The sintering atmosphere is 10vol% argon gas + 90% hydrogen gas, the metal powder particles and the metal fiber felt in the measuring device are sintered to form a metal substrate 4, the metal substrate 4 is a double-layer structure, and the double-layer structure includes a fiber felt layer arranged up and down and The powder layer is sintered, and then the metal substrate 4 is taken out.

6) Flattening: place the sintered metal substrate 4 between two flat templates, apply pressure, and press the height to 0.6 mm, and the density after pressing is 4.8 g/cm ³ ;

7) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate 4 by screen printing or dip coating, and the uncoated lower surface of the metal substrate 4 is placed on the setter plate. The anode layer 2 is formed on the upper surface of the metal substrate 4 by drying. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _{6- δ} (x=0.1), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

8) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes Ba(Sr)Ce(Ln)O ₃ electrolyte, butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

9) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

Example 5:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 434L stainless steel powder. According to the mass percentage, the 434L stainless steel powder includes the following components: C: 0.025%, Cr: 17.5%, Mn: 0.8%, Si: 0.6%, Mo: 1.05%, iron: surplus;

2) Sieve the above powder, the particle size range is 150-200 mesh, and the powder bulk density is 2.35g/cm3.

3) The setter plate is a ceramic plate containing 95% alumina;

⁴ ) Sintering: Sinter the setter plate with the measuring device at a sintering temperature of 1200° C. for 120 minutes. In the inner hole, remove the excess powder, the inner hole size of the measuring device is 120×120 mm, and the thickness is 1.2 mm; the powder in the measuring device is sintered to form a metal substrate 4, and then the metal substrate 4 is taken out;

5) Flattening: place the sintered metal substrate 4 between two flat templates, apply pressure, and press the height to 0.65 mm, and the density after pressing is 4.5 g/cm ³ .

6) Wax immersion: Melt polyethylene wax at a melting temperature of 120°C, put the metal support plate into the wax melt for 5 minutes, and take out the metal plate to cool after the pores have penetrated into the wax. Melted paraffin wax, EVA wax or PP wax can also be used.

7) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate 4 by screen printing or dip coating, and the uncoated lower surface of the metal substrate 4 is placed on the setter plate. The anode layer 2 is formed on the upper surface of the metal substrate 4 by drying. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _{6- δ} (x=0.3), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

8) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes Ba(Sr)Ce(Ln)O ₃ electrolyte, butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

9) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

It can be seen from Figure 5 and Figure 6 that the metal support plate has many pores, which can ensure good air permeability. The support plate of the present embodiment is about 50% of the weight of the existing metal support plate with the same thickness, so as to achieve the purpose of light weight.

Example 6:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 434L stainless steel powder. According to the mass percentage, the 434L stainless steel powder includes the following components: C: 0.025%, Cr: 17.5%, Mn: 0.8%, Si: 0.6%, Mo: 1.05%, iron: surplus;

2) The above powder is sieved, the particle size is 100-150 mesh, and the bulk density of the powder is 2.60 g/cm ³ .

3) The setter plate is a ceramic containing 95% alumina. Pour the powder in step 2) into the inner hole of the measuring device to remove excess powder. The size of the inner hole of the measuring device is 120×120mm and the thickness is 1.2mm ;

4) Sintering: sintering the setter plate with the measuring device at 1250° C. for 80 minutes at the sintering temperature, the sintering atmosphere is argon gas with 1×10 ³ Pa of vacuum recoil, and the powder in the measuring device is sintered to form the metal substrate 4, Then take out the metal substrate 4;

5) Flattening: The sintered metal substrate 4 is placed between the rolls of the rolling mill and rolled to a height of 0.68 mm, and the density after pressing is 4.59 g/cm ³ .

6) Anode layer preparation: the anode slurry is uniformly coated on the upper surface of the cut metal substrate 4 by screen printing or dip coating method, and the uncoated lower surface of the metal substrate 4 is placed on the setter plate. The anode layer 2 is formed on the upper surface of the metal substrate 4 by drying. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _{6- δ} (x=0.3), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

7) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes Ba(Sr)Ce(Ln)O ₃ electrolyte, butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

8) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

It can be seen from Figures 7 and 8 that the metal support plate has many pores and low density, which can ensure good air permeability. The support plate of the present embodiment is about 50% of the weight of the existing metal support plate with the same thickness, so as to achieve the purpose of light weight.

Example 7:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 434L stainless steel powder. According to the mass percentage, the 434L stainless steel powder includes the following components: C: 0.025%, Cr: 17.5%, Mn: 0.8%, Si: 0.6%, Mo: 1.05%, iron: surplus;

2) sieve the above-mentioned powder, select a particle size of 200 to 325 meshes, and a powder bulk density of 2.42 g/cm3.

3) The setter plate is a ceramic plate containing 95% alumina. Pour the powder in step 2) into the inner hole of the measuring device to remove the excess powder. The inner hole size of the measuring device is 120×120 mm and the thickness is 1.2 mm mm;

4) Sintering: place the setter plate with the measuring device in a pusher furnace, sinter at a sintering temperature of 1250 ° C for 30 minutes, the sintering atmosphere is 80 vol% nitrogen and 20 vol% hydrogen, and the powder in the measuring device is sintered to form a metal Substrate 4, and then take out the metal substrate.

5) Flattening: The sintered metal substrate is placed between the rolls of the rolling mill for rolling, and rolled to a height of 0.68 mm, the density after pressing is 4.59 g/cm ³ , and the metal substrate 4 is pressed by a laser, a shearing machine or a punch. Cut the material to the required size.

6) Anode layer preparation: the anode slurry is uniformly coated on the upper surface of the cut metal substrate 4 by screen printing or dip coating method, and the uncoated lower surface of the metal substrate 4 is placed on the setter plate. The anode layer 2 is formed on the upper surface of the metal substrate 4 by drying. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _{6- δ} (x=0.3), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

7) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes Ba(Sr)Ce(Ln)O ₃ electrolyte, butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

8) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

Example 8:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 430L stainless steel powder. According to the mass percentage, the 430L stainless steel powder includes the following components: C: 0.025%, Cr: 16.8%, Mn: 0.6%, Si: 0.5%, iron: balance;

2) The above powder is sieved, the particle size is selected from 100 mesh to 150 mesh, and the powder bulk density is 2.45 g/cm ³ .

3) The setter plate is a ceramic plate containing 95% alumina. Pour the powder in step 2) into the inner hole of the measuring device to remove the excess powder. The inner hole size of the measuring device is 120×120 mm and the thickness is 1.2 mm mm;

4) Sintering: place the setter plate with the measuring device in a pusher furnace, sinter at a sintering temperature of 1250 ° C for 30 minutes, the sintering atmosphere is 80 vol% nitrogen and 20 vol% hydrogen, and the powder in the measuring device is sintered to form a metal Substrate 4, and then take out the metal substrate stock.

5) Flattening: The sintered metal substrate is placed between the rolls of the rolling mill and rolled to a height of 0.68 mm, and the density after pressing is 4.59 g/cm ³ .

6) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate by screen printing or dip coating, and the uncoated lower surface of the metal substrate is placed on the setter plate for By drying, the anode layer 2 is formed on the upper surface of the metal substrate. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

7) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes Ba(Sr)Ce(Ln)O ₃ electrolyte, butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

8) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

Example 9:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 316L stainless steel powder. According to the mass percentage, the 316L stainless steel powder includes the following components: C: 0.03%, Cr: 17.8%, Ni: 12.5%, Mn: 1.2%, Si: 0.8%, Mo: 2.48%, Iron: balance;

2) The above powder is sieved, the particle size is selected from 200 mesh to 325 mesh, and the powder bulk density is 2.45 g/cm ³ .

3) The setter plate is a ceramic plate containing 95% alumina. Pour the powder in step 2) into the inner hole of the measuring device to remove the excess powder. The inner hole size of the measuring device is 120×120 mm and the thickness is 1.2 mm mm;

4) Sintering: place the setter plate with the measuring device in a vacuum furnace, sintering at a sintering temperature of 1180° C. for 180 minutes, the sintering atmosphere is argon gas with 1×10 ⁴ Pa of vacuum backflushing, and the powder in the measuring device Sintering to form a metal substrate, and then taking out the metal substrate material;

5) Flattening: The sintered metal substrate is placed between the rolls of the rolling mill and rolled to a height of 0.68 mm, and the density after pressing is 4.59 g/cm ³ .

6) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate by screen printing or dip coating, and the uncoated lower surface of the metal substrate is placed on the setter plate for By drying, the anode layer 2 is formed on the upper surface of the metal substrate. The aforementioned anode slurry includes yttria-stabilized zirconia YSZ, NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

7) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes yttria-stabilized zirconia electrolyte, methyl ethyl ketone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

8) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.1) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3 after the uncoated lower surface is placed on a setter plate and dried.

Example 10:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is 316L stainless steel powder. According to the mass percentage, the 316L stainless steel powder includes the following components: C: 0.03%, Cr: 17.8%, Ni: 12.5%, Mn: 1.2%, Si: 0.8%, Mo: 2.48%, Iron: balance;

2) The above powder is sieved, the particle size is 325-1000 mesh, the size is 13-250um, and the powder bulk density is 2.25g/cm ³ .

3) The setter plate is a ceramic plate containing 95% alumina. Pour the powder in step 2) into the inner hole of the measuring device to remove the excess powder. The inner hole size of the measuring device is 120×120 mm and the thickness is 1.2 mm mm;

⁴ ) Sintering: place the setter plate with the measuring device in a vacuum furnace, and sinter at a sintering temperature of 1120° C. for 200 minutes. Sintering forms a metal substrate, and then the metal substrate stock is removed.

5) Flattening: The sintered metal substrate is placed between the rolls of the rolling mill and rolled to a height of 0.68 mm, and the density after pressing is 4.59 g/cm ³ .

6) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate by screen printing or dip coating, and the uncoated lower surface of the metal substrate is placed on the setter plate for By drying, the anode layer 2 is formed on the upper surface of the metal substrate. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

7) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes Ba(Sr)Ce(Ln)O ₃ electrolyte, butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

8) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

Example 11:

The method for preparing a metal support plate for a fuel cell in this embodiment sequentially includes the following steps:

1) Prepare the raw materials. The material is iron-chromium-aluminum powder. According to the mass percentage, the iron-chromium-aluminum powder includes the following components: C: 0.06%, Cr: 21.1%, Mn: 0.9%, Si: 0.3%, Al: 4.79%, iron: balance;

2) The above powder is sieved, the particle size is 325-1000 mesh, the size is 13-250um, and the powder bulk density is 2.25g/cm ³ .

3) The setter plate is a ceramic containing 95% alumina. Pour the powder in step 2) into the inner hole of the measuring device to remove excess powder. The size of the inner hole of the measuring device is 120×120mm and the thickness is 1.2mm ;

⁴ ) Sintering: place the setter plate with the measuring device in a vacuum furnace, and sinter at a sintering temperature of 1150° C. for 200 minutes. The powder is sintered to form a metal substrate, and the metal substrate stock is then removed.

5) Flattening: The sintered metal substrate is placed between the rolls of the rolling mill and rolled to a height of 0.68 mm, and the density after pressing is 4.59 g/cm ³ .

6) Anode layer preparation: The anode slurry is uniformly coated on the upper surface of the cut metal substrate by screen printing or dip coating, and the uncoated lower surface of the metal substrate is placed on the setter plate for By drying, the anode layer 2 is formed on the upper surface of the metal substrate. The aforementioned anode slurry includes Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3), NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyethylene glycol Alcohol PEG and Glutamate PHT.

7) Electrolyte coating preparation: the prepared electrolyte slurry is evenly coated on the anode layer 2 by screen printing or dip coating method, and the uncoated lower surface is placed on a setter plate for drying and sintering, Thus, the electrolyte coating layer 3 is formed on the upper surface of the anode layer 2 . The aforementioned electrolyte slurry includes Ba(Sr)Ce(Ln)O ₃ electrolyte, butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG and glutamic acid PHT.

8) Preparation of cathode layer: the cathode slurry made of Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0.3) cathode material is uniformly coated on the electrolyte coating by screen printing or dip coating method. On the upper surface of the layer, the uncoated lower surface is placed on a setter plate and dried, so that the cathode layer 1 is formed on the upper surface of the electrolyte coating layer 3, thereby forming a metal support plate.

Example 12:

The only difference between this embodiment and the above-mentioned Embodiment 3 is: 1. The metal fiber mat is different. Specifically, the metal fiber mat includes the following components in terms of mass percentage: C: 0.006%, Cr: 10%, Mn: 2 %, Si: 1%, Al: 10%, Nb: 2%, Ti: 2%, Ni: 25%, Iron: balance.

2. Stainless steel is different, specifically, heat-resistant steel is used. According to the mass percentage, the heat-resistant steel includes the following components: C: 0.025%, Cr: 30%, Mn: 2%, Mo: 4%, iron: more quantity.

3. The sintering parameters in step 5) are different. Specifically, the sintering temperature is 1050° C. and the sintering time is 300 min.

4. The cathode slurry is different, specifically, the cathode slurry made of LSCF ((La, Sr)(Co, Fe)O ₃ ) is used.

Example 13:

The only difference between this embodiment and the above-mentioned Embodiment 3 is: 1. The metal fiber mat is different. Specifically, the metal fiber mat includes the following components in terms of mass percentage: C: 0.006%, Ni: 25%, Cr: 30% %, Mo: 4%, Nb: 3%, Al: 5%, Ti: 3%, Iron: balance.

2. The raw materials in step 1) are different. Specifically, the sintered stainless steel includes the following components in terms of mass percentage: C: 0.025%, Cr: 10%, Si: 1%, Ni: 25%, Nb: 3% , Al: 10%, Ti: 3%, Iron: balance.

3. The sintering parameters in step 5) are different. Specifically, the sintering temperature is 1400° C. and the sintering time is 10 minutes.

In addition, it is also possible to replace the sintered stainless steel with one of nickel-based alloys, cobalt-based alloys, titanium alloys, and chromium-based alloys.

4. Different cathode slurries, specifically, a slurry made from one of composite ceramics and L-type ceramics with perovskite structure.

In addition, LSM (La _1-x Sr _x Mn0 ₃ ) and A2Ru2O7-x (A=Pb, Bi) ceramics with pyrochlore structure can also be used as the cathode slurry, wherein x=0, 0.1, 0.3, 0.5.

The setter plates of the above embodiments are not easily deformed and cracked during sintering, heating and cooling. The measuring device in the above-mentioned embodiment can also adopt the existing bottomed measuring device, first pour the powder in the step 2) into the measuring device, remove the powder higher than the measuring device with a scraper, and then burn the powder. The plate is covered on the powder measuring device containing the powder, and the setter plate, the metal fiber felt and the measuring device are turned over 180 ^° , and the powder measuring device is taken out.

Claims (10)

A method for manufacturing a metal support plate for a fuel cell, characterized in that the following steps are included in sequence: 1) Use one of sintered stainless steel, heat-resistant steel, nickel-based alloy, cobalt-based alloy, titanium alloy, and chromium-based alloy; 2) sieve the powder in step 1), and select the powder particle size to be 13-250um; 3) Place the powder in the inner hole of the measuring device, remove the excess powder, and place it on the setter plate; 4) Sinter the setter plate on which the measuring device is placed, the powder in the measuring device forms a metal substrate, and flatten the metal substrate; 5) Coating the anode slurry on the upper surface of the metal substrate, then placing the uncoated lower surface of the metal substrate on the setter, and sintering after drying, thereby forming an anode layer on the upper surface of the metal substrate; 6) Coating the electrolyte slurry on the upper surface of the anode layer, then placing the uncoated lower surface of the metal substrate on the setter, and sintering after drying to form an electrolyte coating on the upper surface of the anode layer ; 7) Coating the cathode slurry on the upper surface of the electrolyte coating, then placing the uncoated lower surface of the metal substrate on the setter, and sintering after drying, thereby forming a cathode on the upper surface of the electrolyte coating layer to make a metal support plate. The manufacturing method according to claim 1, characterized in that: between step 4) and step 5), a wax dipping process is performed, that is, a metal substrate of a required size is placed in the wax melt for 1-30 minutes, and the metal substrate is treated After infiltrating the wax melt into the pores in the metal substrate, the metal substrate is taken out and cooled. The manufacturing method according to claim 1, characterized in that: in step 4), the upper surface of the setter plate is laid with metal fiber felt cutting pieces with a porosity greater than 50%, and a measuring device with powder is placed on the upper surface of the setter. Above the metal fiber felt cutting piece, after sintering, a metal substrate with a double-layer structure is formed, and the double-layer structure includes a fiber felt layer and a sintered powder layer arranged up and down. The manufacturing method according to claim 3, wherein the metal fiber felt comprises the following components by mass percentage: carbon: ≤ 0.06%, nickel: 0-25%, molybdenum: 0-4%, chromium : 10～30%, Niobium: 0～3%, Aluminum: 0～10%, Titanium: 0～3%, Silicon: 0～1%, Manganese: 0～2%, unavoidable impurities not exceeding 2% , iron: margin. The manufacturing method according to claim 1, characterized in that: in step 1), sintered stainless steel is selected, and the components of the sintered stainless steel, in terms of mass percentage, include the following components: carbon: ≤ 0.06%, nickel: 0-25 %, Molybdenum: 0～4%, Chromium: 10～30%, Niobium: 0～3%, Aluminum: 0～10%, Titanium: 0～3%, Silicon: 0～1%, Manganese: 0～2% , not more than 2% unavoidable impurities, iron: balance. The manufacturing method according to claim 1, characterized in that: in step 4), the sintering temperature is 1000℃～1350℃, the sintering time is 5～240min, and the vacuum degree is 10 ^-3 Pa～10 ² Pa. The manufacturing method according to claim 1, wherein the sintering temperature in step 5) is 1050°C-1400°C, the sintering time is 10-300min, the sintering temperature in step 6) is 1000°C-1400°C, and the sintering temperature is 1000-1400°C. The sintering time is 10～300min, the sintering temperature used in the sintering in step 7) is 800℃～1200℃, the sintering time is 5～300min, and the vacuum degree is 10 ^-3 Pa～10 ² Pa. The manufacturing method according to any one of claims 1 to 7, wherein the anode slurry comprises NiO, methyl ethyl ketone, ethanol, triethanolamine, starch, polyvinyl butyral PVB, polyvinyl butyral Ethylene glycol PEG and glutamic acid PHT also include one of yttria-stabilized zirconia and Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ (x=0, 0.1, 0.3, 0.5). The manufacturing method according to claim 8, wherein the electrolyte slurry comprises butanone, ethanol, triethanolamine, polyvinyl butyral PVB, polyethylene glycol PEG, and glutamic acid PHT, and further comprises There is one of yttria-stabilized zirconia, LaGaO ₃ based electrolyte, Ba(Sr)Ce(Ln)O ₃ and CeO ₂ based solid electrolyte. The manufacturing method according to claim 9, wherein the cathode slurry is Sr _2-x Ca _x Fe _1.5 Mo _0.5 O _6-δ , LSM (La _1-x Sr _x MnO ₃ ), LSCF ((( One of La, Sr)(Co, Fe)O ₃ ), A ₂ Ru ₂ O _7-x (A=Pb, Bi) ceramics with pyrochlore structure, Ag-YDB composite ceramics and L-type ceramics with perovskite structure species, the aforementioned x=0, 0.1, 0.3, 0.5.

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