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WO2016010349A1 - Pile rechargeable au lithium du type bouton - Google Patents

Pile rechargeable au lithium du type bouton Download PDF

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Publication number
WO2016010349A1
WO2016010349A1 PCT/KR2015/007316 KR2015007316W WO2016010349A1 WO 2016010349 A1 WO2016010349 A1 WO 2016010349A1 KR 2015007316 W KR2015007316 W KR 2015007316W WO 2016010349 A1 WO2016010349 A1 WO 2016010349A1
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WIPO (PCT)
Prior art keywords
dimensional
button
lithium secondary
secondary battery
type lithium
Prior art date
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Ceased
Application number
PCT/KR2015/007316
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English (en)
Korean (ko)
Inventor
홍영진
최경린
정민영
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Orange Power Ltd
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Orange Power Ltd
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Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/134—Electrodes based on metals, Si or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/80—Porous plates, e.g. sintered carriers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/153—Lids or covers characterised by their shape for button or coin cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H01M50/56—Cup shaped terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/386—Silicon or alloys based on silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/387—Tin or alloys based on tin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a button-type lithium secondary battery, and more particularly to a button-type of a new structure including a positive electrode and a negative electrode having a three-dimensional structure, and having a separate double gasket that surrounds the positive and negative electrodes of the three-dimensional structure. It relates to a lithium secondary battery.
  • Lithium secondary batteries are compact, lightweight, have high energy density, and have excellent storage characteristics. Therefore, lithium secondary batteries have been widely used as main power and backup power sources for various electronic devices. Coin-shaped, cylindrical, etc. are used as a lithium secondary battery assembled in these apparatuses.
  • button-type and coin-type batteries have a very thin button shape, and are mainly used as a power source for miniaturized and slimmer products, such as an electronic calculator and a watch, among which electrical products, and can be miniaturized, lightened, and used for a long time. Should be.
  • FIG. 1 The structure of a typical button cell is shown in FIG. Referring to FIG. 1, in the button type and coin type batteries, the positive electrode active material pellets 2 are filled inside the can 1, and the negative electrode active material pellets 4 are filled inside the cup 3.
  • the cup 3 is installed in an inverted manner in a manner that seals the open inlet of the can 1.
  • the positive electrode active material pellets 2 and the negative electrode active material pellets 4 are separated from each other by the separator 5.
  • Designated by reference numeral 6 is a gasket, which is manufactured in a shape surrounding the distal end of the can 3 to insulate between the cup 3 and the can 1.
  • button-type batteries have been mainly applied to primary batteries.
  • button-type batteries have to be applied to secondary batteries that can be charged and discharged in accordance with demands of electronic clocks and memory backup power supplies that require a long life.
  • Lithium secondary batteries have attracted attention as batteries which are most suitable for demand.
  • Lithium secondary batteries are one of the most attracting attention because they can be rapidly charged due to the inflow reaction of lithium ions, the charging reaction of the negative electrode is relatively fast, not only can be used repeatedly for a long time, but also ensures safety as a high voltage battery.
  • the lithium secondary battery uses lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ), lithium manganese oxide (LiMn 2 O 4 ), etc. as a positive electrode active material.
  • LiCoO 2 lithium cobalt oxide
  • LiNiO 2 lithium nickel oxide
  • LiMn 2 O 4 lithium manganese oxide
  • the alloy is used, the stability problem according to the number of charge and discharge has emerged, and carbon material is used as a substitute.
  • Conventional button-type lithium secondary batteries exhibit high capacity by manufacturing the cathode active material layer with a thickness of 200 ⁇ m or more, but in this case, the capacity rate per unit area is 30 mAh / cm 2 or more, which increases the capacity per unit area. (c-rate) has been shown to limit.
  • the conventional high capacity button-type lithium secondary battery has a maximum continuous discharge rate of 0.1 C or less and a standard charge / discharge rate of 0.01 C or less.
  • the present invention includes a three-dimensional positive electrode and a negative electrode to exhibit improved rate-rate characteristics while having a high capacity in order to improve the capacity characteristics of the conventional button-type battery as described above, and to increase the capacity by the application of the three-dimensional positive and negative electrodes as described above It is an object of the present invention to provide a button-type lithium secondary battery having a new structure having a separate and independent double gasket in order to improve the leakage problem when the internal pressure increases.
  • the present invention to solve the above problems,
  • a first outer can formed in a cylindrical shape having a bottom and serving as a first electrode terminal
  • Power generation unit comprising a
  • a second outer can which serves as a second electrode terminal and is formed in an inverted bottomed cylindrical shape and is accommodated inside the first outer can while covering the power generation unit;
  • the separator is formed to surround the three-dimensional anode or three-dimensional anode
  • the first gasket is between the separator and the three-dimensional anode or three-dimensional cathode wrapped by the separator Inserted into and extending to the first outer can.
  • the button-type lithium secondary battery according to the present invention is characterized in that it comprises a three-dimensional structure of the positive electrode, the power generation unit including the negative electrode, and two separate and independent gaskets formed between the first outer can and the second outer can.
  • FIG 2 shows the structure of (a) the button-type lithium secondary battery according to the conventional method, and (b) the button-type lithium secondary battery according to the present invention.
  • the button-type lithium secondary battery according to the present invention is formed in a cylindrical shape having a bottom and serves as a first outer can 110 that serves as a first electrode terminal, and is sequentially stacked and accommodated in the first outer can.
  • Power generation unit 120 including;
  • a second outer can 130 which serves as a second electrode terminal and is formed in an inverted bottomed cylindrical shape and covers the power generation unit accommodated in the first outer can and is received inside the first outer can;
  • a first gasket (140) extending from the inside of the second outer can to the first outer can to insulate the distal end of the second outer can and the first outer can;
  • the button-type lithium secondary battery according to the present invention extends from the inside of the second outer can 130 to the first outer can 110 so that the end portion of the second outer can and the A first gasket 140 that insulates between the first outer cans; And a second gasket 150 formed between the outside of the second outer can and the first outer can.
  • the separator 122 is formed to surround the three-dimensional positive electrode or the three-dimensional negative electrode
  • the first gasket 140 is a three-dimensional positive electrode wrapped by the separator and the separator.
  • the first outer can 110 and the second outer can 130 may be formed when the separator and the outer can are lifted by being formed between the three-dimensional cathodes and extending to the first outer can. Can be insulated reliably.
  • the three-dimensional positive electrode or the negative electrode means a positive electrode or a negative electrode having a three-dimensional conductive network structure. Since the electrical conduction is made three-dimensionally through the three-dimensional positive electrode or the negative electrode, not only the rate characteristic is improved, but also the volume change due to the occlusion and release of lithium during charging and discharging of the lithium secondary battery can be effectively coped with.
  • the three-dimensional anode is characterized in that the cathode active material is formed on the three-dimensional conductive support.
  • the three-dimensional conductive support is selected from the group consisting of carbon paper, carbon felt, carbon cloth, metal foam, metal paper, metal felt, metal cloth, metal mesh do.
  • the manufacturing method for forming the positive electrode active material on the three-dimensional conductive support is not particularly limited, dip coating (spin coating), spin coating (spray coating), spray coating (spray) coating), chemical vapor deposition (CVD), etc., to form a cathode active material on the conductive support.
  • the positive electrode active material is not particularly limited, elemental sulfur, sulfur compound, Li a A 1-b R b D 2 (0.90 ⁇ a ⁇ 1.8, 0 ⁇ b ⁇ 0.5); Li a A 2-b R b D 4 (0.90 ⁇ a ⁇ 1.8, 0 ⁇ b ⁇ 0.5, 0 ⁇ c ⁇ 0.05); EO 2 ; ES 2 ; LiES 2 ; V 2 O 5 ; LiV 2 O 5 ; LiGO 2 ; LiNiVO 4 ; Li (3-d) J 2 (PO 4 ) 3 (0 ⁇ d ⁇ 2); Li (3-d) Fe 2 (PO 4 ) 3 (0 ⁇ d ⁇ 2 ); And LiFePO 4 .
  • A is Ni, Co, Mn or a combination thereof
  • R is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, rare earth element or a combination thereof
  • D is O, F, S, P or a combination thereof
  • E is Ti, Mo, Mn or a combination thereof
  • G is Cr, V, Fe, Sc, Y or a combination thereof
  • J is V, Cr, Mn, Co , Ni, Cu, or a combination thereof
  • the three-dimensional negative electrode is characterized in that the negative electrode active material film is formed on the surface of a plurality of fibers forming a three-dimensional network structure.
  • the fiber is made of a metal, and the metal is Cu, SUS. Ti, Ni, Al, Sn, W, Ag, Cr, V, Mo, Zr, Y, Sb, and a combination thereof.
  • the fiber is characterized in that the carbon fiber.
  • Carbon fiber refers to a fiber having a carbon content of 90% or more that is produced by carbonizing and graphitizing a carbon precursor such as polyacrylonitrile (PAN), rayon or pitch at a high temperature of 1500 ° C. or higher.
  • PAN polyacrylonitrile
  • a method for forming a negative electrode active material film on a plurality of fiber surfaces forming the three-dimensional network structure is not particularly limited, but electrolytic plating, electroless plating, dip coating ), Spin coating, spray coating, chemical vapor deposition (CVD) and the like.
  • the three-dimensional negative electrode is characterized in that the negative electrode active material is formed on the three-dimensional conductive support.
  • the three-dimensional conductive support is characterized in that selected from the group consisting of carbon paper, carbon felt, carbon cloth, metal foam, metal paper, metal felt, metal cloth, metal mesh.
  • the negative electrode active material is selected from Si, Sn, SiO x (0 ⁇ x ⁇ 2), SnO x (0 ⁇ x ⁇ 2), and a combination thereof. .
  • the silicon-based or tin-based negative electrode active material there is an advantage in that a high capacity button type lithium secondary battery can be manufactured.
  • the negative electrode active material further comprises a carbon material.
  • the manufacturing method for forming the negative electrode active material on the three-dimensional conductive support is not particularly limited, dip coating (spin coating), spin coating (spray coating), spray coating (spray)
  • the active material may be formed on the conductive support through coating, chemical vapor deposition (CVD), or the like.
  • the thickness of the three-dimensional positive electrode or three-dimensional negative electrode is characterized in that more than 200 ⁇ m. Since the present invention includes the anode and the cathode constituting the three-dimensional conductive network structure, even if the thickness of the anode or cathode is 200 ⁇ m or more can exhibit excellent rate-rate characteristics.
  • a button-type lithium secondary battery comprising: an aluminum current collector bonded between the three-dimensional positive electrode and an outer can; And a copper current collector bonded between the three-dimensional negative electrode and the outer can.
  • the present invention has an effect of exhibiting excellent rate-rate characteristics while having a high capacity by including a button-type lithium secondary battery including a three-dimensional anode and a cathode in which electrical conduction is three-dimensional.
  • FIGS. 1 and 2 are schematic diagrams showing a conventional button-type lithium secondary battery.
  • FIG. 3 is a schematic view showing a button-type lithium secondary battery according to the present invention.
  • a positive electrode active material LiNi 0.4 Co 0.2 Mn 0.4 O 2 ) powder having an average particle diameter of 15 ⁇ m in NMP, 3% by weight of super-p as a conductive material and 7% by weight of polyvinylidene fluoride as a binder After mixing, the mixture was ball milled at 300 rpm for 12 hours to produce a dispersed positive slurry.
  • a plurality of metal fibers made of SUS were prepared.
  • the metal fiber used what was shape
  • the plurality of metal fibers formed a three-dimensional network structure having pores with a pore size and a porosity of 80% between 50 ⁇ m and 200 ⁇ m between adjacent metal fibers.
  • the prepared positive electrode slurry was applied onto a three-dimensional metal current collector and dried at 100 ° C. Thereafter, the resultant was calcined at 120 ° C. for 1 hour in a vacuum atmosphere to fill a cathode active material in pores formed by a plurality of metal fibers included in the cathode.
  • Example 1 Except for coating the slurry prepared in Example 1 on the carbon paper in the same manner as in Example 1 to prepare a three-dimensional positive electrode plate.
  • the plurality of carbon fibers formed a three-dimensional network structure having pores having a mean size of 50 ⁇ m to 100 ⁇ m and a porosity of 90% between adjacent carbon fibers.
  • a positive electrode plate was manufactured in the same manner as in Example 1 except that the slurry was coated on an aluminum current collector.
  • Electroplating was performed in a vacuum glove box filled with argon gas at 20 ° C. to prepare a three-dimensional cathode containing tin and copper on the surface and inside of the three-dimensional network structure formed by a plurality of metal fibers.
  • SUS Fiber (5mm x 5mm area) was used as the working electrode, SCE electrode was used as the reference electrode, and platinum mesh was used as the counter electrode.
  • the electrodes were immersed in electrolyte solution. 0.09 M tin pyrophosphate (Sn 2 P 2 O 7 ), 0.40 M potassium pyrophosphate (K 4 P 2 O 7 ), and 0.05 M tartaric acid were used as the electrolyte solution.
  • a slurry was prepared by mixing and dispersing graphite powder (average particle diameter: 10 mu m) and a binder in a weight ratio of 97: 3 in distilled water. The prepared slurry was applied on the cathode on which the tin-containing layer was formed and dried at room temperature. Then, the graphite was filled in the pores formed by the plurality of metal fibers included in the cathode by firing at 100 ° C. for 12 hours in a vacuum atmosphere, and the cathode 100 was formed on the surface and inside of the three-dimensional network structure formed by the plurality of metal fibers.
  • a negative electrode having a 2 ⁇ m thick tin-containing layer containing 10 parts by weight of tin was prepared with respect to parts by weight.
  • a three-dimensional cathode was prepared in the same manner as in Example 3 except that carbon paper (5 mm ⁇ 5 mm area) was used as a working electrode.
  • a negative electrode was prepared in the same manner as in Example 3 except that the slurry was coated on a copper current collector.
  • Example 5 button-type lithium secondary battery
  • the button-type lithium secondary battery was manufactured by using the three-dimensional positive electrode prepared in Example 1, the three-dimensional negative electrode prepared in Example 3, and a separator. At this time, 1 M LiPF 6 was dissolved in an ethylene carbonate and diethyl carbonate 1: 1 ratio as the electrolyte solution.
  • Example 6 button-type lithium secondary battery
  • a button-type lithium secondary battery was manufactured in the same manner as in Example 5, except that the three-dimensional anode prepared in Example 2 and the three-dimensional anode prepared in Example 4 were used.
  • a button-type lithium secondary battery was manufactured in the same manner as in Example 5, except that the positive electrode prepared in Comparative Example 1 and the negative electrode prepared in Comparative Example 2 were used.
  • the discharge capacity was measured while charging and discharging the button-type lithium secondary batteries prepared in Examples 5, 6 and Comparative Example 3 at a constant current of 0.01 C to 0.1 C rate in a voltage range of 3 to 4.2 V at room temperature. 1 is shown.
  • the button-type lithium secondary battery according to the present invention includes a three-dimensional anode, a separator, and a three-dimensional cathode including a three-dimensional positive electrode, a separator, and a three-dimensional negative electrode which are formed in a cylindrical shape with a bottom and are sequentially stacked in the first outer can. And a first gasket and a second gasket extending from the inside of the second outer can to the first outer can to insulate the distal end of the second outer can and the first outer can. It can be said that it is very useful in that the excellent rate-rate property is greatly improved.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne une pile rechargeable au lithium de type bouton, la pile rechargeable au lithium de type bouton comportant une cathode en trois dimensions, une anode en trois dimensions et deux joints séparés indépendamment. La présente invention permet la fabrication d'une pile rechargeable au lithium de type bouton qui présente une capacité élevée et d'excellentes propriétés de limitation de débit du fait qu'elle comporte une cathode et une anode en trois dimensions formant une structure de réseau conducteur en trois dimensions, et qui présente une sécurité améliorée du fait qu'elle comprorte des joints doubles.
PCT/KR2015/007316 2014-07-14 2015-07-14 Pile rechargeable au lithium du type bouton Ceased WO2016010349A1 (fr)

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KR1020140088167A KR20160008270A (ko) 2014-07-14 2014-07-14 버튼형 리튬 2차 전지
KR10-2014-0088167 2014-07-14

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WO2016010349A1 true WO2016010349A1 (fr) 2016-01-21

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WO (1) WO2016010349A1 (fr)

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CN107946486A (zh) * 2017-10-25 2018-04-20 深圳市能锐创新科技有限公司 新型扣式锂离子电池用壳体
CN113394442A (zh) * 2021-06-28 2021-09-14 新余赣锋电子有限公司 一种纽扣电池结构

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KR20180039364A (ko) * 2016-10-10 2018-04-18 한국과학기술원 블록 공중합체 패치 입자의 제조방법 및 그로부터 제조된 블록 공중합체 패치 입자
KR102410663B1 (ko) * 2018-07-06 2022-06-17 주식회사 엘지에너지솔루션 이차전지 및 그 제조방법

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JP2005347104A (ja) * 2004-06-03 2005-12-15 Hitachi Maxell Ltd コイン形電池
KR20090112567A (ko) * 2008-04-23 2009-10-28 소니 가부시끼 가이샤 부극 및 2차전지
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CN107946486A (zh) * 2017-10-25 2018-04-20 深圳市能锐创新科技有限公司 新型扣式锂离子电池用壳体
CN113394442A (zh) * 2021-06-28 2021-09-14 新余赣锋电子有限公司 一种纽扣电池结构

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