WO2019103031A1 - リチウムイオン二次電池 - Google Patents
リチウムイオン二次電池 Download PDFInfo
- Publication number
- WO2019103031A1 WO2019103031A1 PCT/JP2018/042965 JP2018042965W WO2019103031A1 WO 2019103031 A1 WO2019103031 A1 WO 2019103031A1 JP 2018042965 W JP2018042965 W JP 2018042965W WO 2019103031 A1 WO2019103031 A1 WO 2019103031A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- active material
- negative electrode
- positive electrode
- electrode active
- secondary battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M2010/4292—Aspects relating to capacity ratio of electrodes/electrolyte or anode/cathode
-
- 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 lithium ion secondary battery.
- a positive electrode plate in which a positive electrode active material made of a lithium transition metal composite oxide is disposed in a predetermined region of a surface of a positive electrode metal foil, and a negative electrode active material made of a carbonaceous material have a predetermined surface on the negative metal foil.
- a lithium secondary battery provided with an internal electrode body in which a negative electrode plate disposed in a region is wound or stacked via a separator (for example, Patent Document 1).
- the negative electrode metal foil of the negative electrode active material with respect to the mass (A (g / cm 2 )) per unit arrangement area of the surface of the positive electrode metal foil of the positive electrode active material.
- the value (C / A) of the ratio of mass (C (g / cm 2 )) per unit arrangement area of the surface of the body satisfies the relationship of 0.9 ⁇ (C / A) ⁇ 2.5, , Its output is more than 200W.
- Lithium secondary batteries are conventionally prevented from being abused by the use of a protection circuit against overcharge, since overcharge causes a problem that the performance is significantly reduced or can not be used. However, abuse may occur if the protection circuit does not operate sufficiently for some reason.
- the positive electrode material of the lithium secondary battery to a material having high thermal stability such as lithium manganate or lithium iron phosphate, predetermined durability against overcharge can be obtained.
- An object of the present embodiment is to provide a lithium ion secondary battery which is resistant to overcharge and has relatively high leaving durability.
- the lithium ion secondary battery of the present embodiment Li a Ni x Co y M z O 2 (0.9 ⁇ a ⁇ 1.2,0.3 ⁇ x ⁇ 0.8,0.2 ⁇ y + z ⁇ 0. 7, M has a positive electrode containing a metal element other than Li, Ni and Co as a positive electrode active material, and a negative electrode containing non-graphitic carbon as a negative electrode active material, and a portion where the positive electrode and the negative electrode face each other
- the basis weight (P) of the positive electrode active material and the basis weight (N) of the negative electrode active material satisfy the relational expression 0.65 ⁇ P / N ⁇ 1.05.
- FIG. 1 is a perspective view of a lithium ion secondary battery according to the present embodiment.
- FIG. 2 is a cross-sectional view taken along line II-II of FIG.
- each component (each component) of this embodiment is in this embodiment, and may differ from the name of each component (each component) in background art.
- the lithium ion secondary battery 1 of the present embodiment is a battery utilizing electron transfer generated with the movement of lithium ions.
- the lithium ion secondary battery 1 supplies electrical energy.
- the lithium ion secondary battery 1 is used singly or in plurality. Specifically, the lithium ion secondary battery 1 is used singly when the required output and the required voltage are small. On the other hand, when at least one of the required output and the required voltage is large, the lithium ion secondary battery 1 is combined with another lithium ion secondary battery 1 and used for a power storage device (battery module). In the power storage device, the lithium ion secondary battery 1 used for the power storage device supplies electrical energy.
- the lithium ion secondary battery 1 includes an electrode assembly 2 including a positive electrode and a negative electrode, a case 3 for housing the electrode assembly 2, and an external terminal 7 disposed outside the case 3. And an external terminal 7 electrically connected to the electrode body 2.
- the lithium ion secondary battery 1 further includes a current collecting member 5 and the like for electrically connecting the electrode body 2 and the external terminal 7.
- the electrode body 2 is formed by winding the laminated body 22 in which the positive electrode and the negative electrode are laminated so as to be insulated from each other by the separator.
- the positive electrode has a metal foil (current collector) and a positive electrode active material layer which is superimposed on the surface of the metal foil and contains active material particles.
- the positive electrode active material layers respectively overlap on both sides of the metal foil.
- the thickness of the positive electrode may be 40 ⁇ m to 150 ⁇ m.
- the metal foil is band-shaped.
- the metal foil of the positive electrode of the present embodiment is, for example, an aluminum foil.
- the positive electrode has a non-coated portion of the positive electrode active material layer (a portion where the positive electrode active material layer is not formed) at one end of the width direction which is the short direction of the band shape.
- the positive electrode active material layer contains a particulate active material (active material particles), a particulate conductive assistant, and a binder.
- the positive electrode active material layer may contain 80% by mass or more and 98% by mass or less of the active material.
- the thickness of the positive electrode active material layer (one layer) may be 12 ⁇ m or more and 70 ⁇ m or less.
- the coated amount of the positive electrode active material layer (one layer) may be 4 mg / cm 2 or more and 17 mg / cm 2 or less.
- the density of the positive electrode active material layer may be 1.5 g / cm 3 or more and 3.0 g / cm 3 or less.
- the coating weight and density are in one layer disposed to cover one side of the metal foil.
- the basis weight of the positive electrode active material layer can be calculated by the following method.
- discharge the battery to 2.0 V at a current of 3 A (or a current corresponding to 1 C if the rated capacity of the battery can be determined), then 2.0 V for 5 hours Hold on.
- the electrode body is removed from the inside of the case in a dry room or an argon atmosphere glove box.
- the positive electrode taken out of the electrode body is washed three times or more with dimethyl carbonate (DMC) having a purity of 99.9% or more and a water content of 20 ppm or less.
- DMC dimethyl carbonate
- a test piece having a set area S (cm 2 ), for example, a size of 4 cm 2 (2 cm ⁇ 2 cm) is cut out, and the mass W1 (mg) is measured.
- the active material layer and the metal foil are separated by immersion in pure water or the like. After separation, the mass W2 (mg) of the metal foil is measured.
- the basis weight of the active material layer is calculated by (W1-W2) / S.
- the active material of the positive electrode is a compound capable of inserting and extracting lithium ions.
- the active material of the positive electrode is Li a Ni x Co y M z O 2 (0.9 ⁇ a ⁇ 1.2, 0.3 ⁇ x ⁇ 0.8, 0.2 ⁇ y + z ⁇ 0.7, M is Li At least a lithium transition metal oxide of a metal element other than Ni, Ni, Co).
- M in the above composition formula may contain at least one metal element selected from the group consisting of Mn, Al, Mg, Zr, W, Ti, and B.
- the charge capacity (charge current per unit area of the electrode: 0.5 mA / cm 2 ) is 110 mAh / g or more and 230 mAh / g or less when the potential of the positive electrode is 4.25 V in terms of lithium potential. Is preferred.
- the charge capacity is more preferably 150 mAh / g or more and 200 mAh / g or less, and still more preferably 160 mAh / g or more and 180 mAh / g or less.
- the active material of the positive electrode is a lithium transition metal oxide of the above composition
- the above charge capacity is within the above numerical range
- the charge and discharge capacity of the carbon material (non-graphitizable carbon) used for the negative electrode In relation, both having resistance to overcharge and having relatively high standing durability can be achieved.
- the lithium transition metal complex oxide represented by the chemical composition of Li a Ni x Co y Mn z O 2 as described above is, for example, LiNi 1/3 Co 1/3 Mn 1/3 O 2 , LiNi 0.55 Co 0.20 Mn 0.25 O 2 and the like.
- the average particle size (D50) of the active material particles of the positive electrode may be 2.0 ⁇ m or more and 20 ⁇ m or less.
- the binder used for the positive electrode active material layer is, for example, polyvinylidene fluoride (PVdF), a copolymer of ethylene and vinyl alcohol, polymethyl methacrylate, polyethylene oxide, polypropylene oxide, polyvinyl alcohol, polyacrylic acid, polymethacrylic acid Styrene butadiene rubber (SBR), carboxymethyl cellulose salt (CMC) and the like.
- PVdF polyvinylidene fluoride
- SBR polymethacrylic acid Styrene butadiene rubber
- CMC carboxymethyl cellulose salt
- the conductive support agent of the positive electrode active material layer is a carbonaceous material.
- the carbonaceous material is, for example, ketjen black (registered trademark), acetylene black, graphite or the like.
- the positive electrode active material layer of the present embodiment has acetylene black as a conductive additive.
- the positive electrode active material layer may contain 1% by mass or more and 15% by mass or less of the conductive additive.
- the negative electrode has a metal foil (current collector) and a negative electrode active material layer formed on the metal foil.
- the negative electrode active material layers are respectively superimposed on both sides of the metal foil.
- the thickness of the negative electrode may be 40 ⁇ m or more and 150 ⁇ m or less.
- the metal foil is band-shaped.
- the negative electrode has a non-coated portion of the negative electrode active material layer (a portion where the negative electrode active material layer is not formed) at one end of the width direction which is the short direction of the band shape.
- the negative electrode has a metal foil (current collector) and a negative electrode active material layer formed on the metal foil.
- the negative electrode active material layers are respectively superimposed on both sides of the metal foil.
- the metal foil is band-shaped.
- the material of the metal foil is preferably aluminum or an aluminum alloy.
- the metal foil is an aluminum foil or an aluminum alloy foil, preferably an aluminum foil.
- the aluminum alloy is an alloy containing 90% by mass or more of aluminum.
- a conductive layer may be formed on the surface of the metal foil containing aluminum.
- the negative electrode has a non-coated portion of the negative electrode active material layer (a portion where the negative electrode active material layer is not formed) at one end of the width direction which is the short direction of the band shape.
- the thickness of the negative electrode may be 40 ⁇ m or more and 150 ⁇ m or less.
- the negative electrode active material layer may include at least a particulate active material (active material particles) and may include a binder.
- the negative electrode active material layer is disposed to face the positive electrode through the separator.
- the width of the negative electrode active material layer is larger than the width of the positive electrode active material layer.
- the negative electrode active material layer may contain 80% by mass or more and 98% by mass or less of the active material.
- the thickness of the negative electrode active material layer (one layer) may be 10 ⁇ m or more and 100 ⁇ m or less.
- Basis weight of the negative electrode active material layer (one layer) may be of 2 mg / cm 2 or more 10 mg / cm 2 or less.
- the basis weight of the negative electrode active material layer is measured by the same method as described above.
- the density (one layer) of the negative electrode active material layer may be 0.5 g / cm 3 or more and 6.0 g / cm 3 or less.
- the active material of the negative electrode can contribute to the electrode reaction of the charge reaction and the discharge reaction at the negative electrode.
- the active material of the negative electrode of the present embodiment is non-graphitic carbon. More specifically, the active material of the negative electrode is non-graphitizable carbon.
- the non-graphitic carbon in the present specification means, in the discharge state, an average interplanar spacing d 002 of (002) plane of 0.340 nm or more and 0.390 nm determined by wide-angle X-ray diffraction method using CuK ⁇ ray as a radiation source. It is the following.
- the non-graphitizable carbon is one whose average interplanar spacing d 002 is 0.360 nm or more and 0.390 nm or less.
- the binder (organic binder) that may be contained in the negative electrode active material layer is the same as the binder used in the positive electrode active material layer.
- the binder for example, styrene butadiene rubber (SBR), carboxymethyl cellulose salt (CMC) and the like are used.
- the negative electrode active material layer may further have a conductive aid such as ketjen black (registered trademark) or acetylene black.
- the ratio (P / N) of the basis weight (P) of the positive electrode active material to the basis weight (N) of the negative electrode active material is 0.65 or more and 1.05 or less.
- the basis weight (P) of the positive electrode active material can be calculated by multiplying the above-described basis weight of the positive electrode active material layer by the mass ratio of the positive electrode active material in the positive electrode active material layer.
- the basis weight of the negative electrode active material can be calculated by multiplying the basis weight of the negative electrode active material layer by the mass ratio of the negative electrode active material in the negative electrode active material layer.
- the lithium ion secondary battery 1 can be resistant to overcharge, and can have relatively high leaving durability.
- Li a Ni x Co y M z O 2 (0.9 ⁇ a ⁇ 1.2, 0.3 ⁇ x ⁇ 0.8, 0.2 ⁇ y + z ⁇ 0.7, M Is the above ratio (P / N), although lithium transition metal oxides other than Li, Ni and Co may be used as the active material of the positive electrode, and the durability at high temperatures may not be maintained. By being 0.65 or more, the durability at high temperature is exhibited. On the other hand, if the above ratio (P / N) is less than 0.65, the durability may be insufficient. If it exceeds 1.05, the lithium ion acceptability at the negative electrode may decrease or the negative electrode may fail. There is a possibility that the resistance to overcharge may be insufficient due to the reduced thermal stability of the
- the potential of the negative electrode when the charging voltage of the lithium ion secondary battery of the present embodiment is 3.6 V may be 300 mV or more and 500 mV or less in terms of lithium potential. When the potential is 300 mV or more, the battery can be more resistant to overcharge. When the above-mentioned potential is 500 mV or less, the battery can have more endurance for leaving.
- the potential of the negative electrode may be 350 mV or more.
- the potential of the negative electrode can be adjusted by changing the basis weight of the positive electrode active material and the basis weight of the negative electrode active material. Specifically, the potential of the above-described negative electrode can be made more noble by reducing the basis weight of the positive electrode active material relative to the basis weight of the negative electrode active material.
- the positive electrode and the negative electrode configured as described above are wound in a state of being insulated by the separator. That is, in the electrode body 2 of the present embodiment, the laminate 22 of the positive electrode, the negative electrode, and the separator is wound.
- the separator is a member having an insulating property.
- the separator is disposed between the positive electrode and the negative electrode.
- the separator holds the electrolytic solution in the case 3. Thereby, at the time of charge and discharge of the lithium ion secondary battery 1, lithium ions move between the positive electrode and the negative electrode stacked alternately with the separator interposed therebetween.
- the separator is band-shaped.
- the separator has a porous separator substrate.
- the separator is disposed between the positive electrode and the negative electrode in order to prevent a short circuit between the positive electrode and the negative electrode.
- the separator of this embodiment has only a separator substrate.
- the separator substrate is porous.
- the separator substrate is, for example, a woven fabric, a non-woven fabric, or a porous membrane.
- Examples of the material of the separator base include polymer compounds, glass, ceramics and the like.
- Examples of the polymer compound include polyesters such as polyacrylonitrile (PAN), polyamide (PA) and polyethylene terephthalate (PET), polyolefins (PO) such as polypropylene (PP) and polyethylene (PE), and cellulose At least one selected from the above can be mentioned.
- the width of the separator (the dimension in the widthwise direction of the band shape) is slightly larger than the width of the negative electrode active material layer.
- the separator is disposed between the positive electrode and the negative electrode stacked in a state of being misaligned in the width direction such that the positive electrode active material layer and the negative electrode active material layer overlap.
- the electrolyte is a non-aqueous electrolyte.
- the electrolytic solution is obtained by dissolving an electrolyte salt in an organic solvent.
- the organic solvent is, for example, cyclic carbonates such as propylene carbonate and ethylene carbonate, linear carbonates such as dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate.
- the electrolyte salt is LiClO 4 , LiBF 4 , LiPF 6 or the like.
- the electrolytic solution of this embodiment is a solution in which 0.5 mol / L or more and 1.5 mol / L or less of LiPF 6 is dissolved in a mixed solvent in which propylene carbonate, dimethyl carbonate, and ethyl methyl carbonate are mixed in a predetermined ratio. is there.
- the case 3 has a case main body 31 having an opening, and a lid plate 32 that closes (closes) the opening of the case main body 31.
- the case 3 accommodates the electrolytic solution in the inner space together with the electrode body 2 and the current collecting member 5 and the like.
- Case 3 is formed of a metal resistant to the electrolyte.
- the case 3 is formed by joining in a state where the opening peripheral edge portion of the case main body 31 and the peripheral edge portion of the rectangular lid plate 32 are overlapped. Also, the case 3 has an internal space defined by the case body 31 and the lid plate 32. In the present embodiment, the opening peripheral edge portion of the case main body 31 and the peripheral edge portion of the lid plate 32 are joined by welding.
- the cover plate 32 has a gas discharge valve 321 capable of discharging the gas in the case 3 to the outside.
- the gas discharge valve 321 discharges the gas from the inside of the case 3 to the outside when the internal pressure of the case 3 rises to a predetermined pressure.
- the gas discharge valve 321 is provided at the center of the lid plate 32.
- the case 3 is provided with a liquid injection hole for injecting an electrolytic solution.
- the injection hole communicates the inside of the case 3 with the outside.
- the liquid injection hole is provided in the cover plate 32.
- the filling hole is sealed (closed) by the filling plug 326.
- the liquid injection stopper 326 is fixed to the case 3 (in the example of the present embodiment, the lid plate 32) by welding.
- the external terminal 7 is a portion electrically connected to the external terminal 7 of another lithium ion secondary battery 1 or an external device or the like.
- the external terminal 7 is formed of a conductive member.
- the external terminal 7 has a surface 71 to which a bus bar or the like can be welded.
- the surface 71 is a plane.
- the current collecting member 5 is disposed in the case 3 and is connected to the electrode body 2 directly or indirectly so as to be electrically conductive.
- the current collecting member 5 of the present embodiment is formed of a conductive member.
- the current collecting member 5 is disposed along the inner surface of the case 3. The current collecting member 5 is conducted to the positive electrode and the negative electrode of the lithium ion secondary battery 1 respectively.
- the electrode body 2 in a state of being housed in a bag-shaped insulating cover 6 that insulates the electrode body 2 and the case 3 (more specifically, the electrode body 2 and the current collecting member 5) Are housed in the case 3.
- the method of manufacturing the lithium ion secondary battery 1 first, a composition containing an active material is applied to a metal foil, an active material layer is formed, and a positive electrode and a negative electrode are respectively produced. In addition, a commercially available separator is prepared or manufactured. Next, the positive electrode, the separator, and the negative electrode are stacked to form the electrode assembly 2. Furthermore, the electrode assembly 2 is placed in the case 3, and the lithium ion secondary battery 1 is assembled by placing the electrolytic solution in the case 3.
- a positive electrode active material layer is formed by applying a composition containing active material particles, a binder, a conductive additive, and a solvent on both surfaces of a metal foil.
- a general method is adopted as a coating method for forming the positive electrode active material layer.
- the coating weight of the positive electrode active material layer can be adjusted by changing the coating amount.
- the applied positive electrode active material layer is roll pressed at a predetermined pressure. By adjusting the pressing pressure, the thickness and density of the positive electrode active material layer can be adjusted.
- the negative electrode can also be produced in the same manner.
- the electrode body 2 is formed by winding the laminated body 22 in which the separator is sandwiched between the positive electrode and the negative electrode. Specifically, the positive electrode, the separator, and the negative electrode are superimposed on each other so that the positive electrode active material layer and the negative electrode active material layer face each other through the separator, to form a laminate 22.
- the laminated body 22 is wound to form the electrode body 2.
- the electrode body 2 is put in the case main body 31 of the case 3, the opening of the case main body 31 is closed by the cover plate 32, and the electrolytic solution is injected into the case 3.
- the electrode body 2 is inserted into the case body 31, the positive electrode and one external terminal 7 are electrically connected, and the negative electrode and the other external terminal 7 are electrically connected.
- the opening of the case body 31 is closed by the cover plate 32.
- the electrolytic solution is injected into the case 3 from the injection hole of the cover plate 32 of the case 3.
- the lithium ion secondary battery of the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the scope of the present invention.
- the configuration of one embodiment can be added to the configuration of another embodiment, and part of the configuration of one embodiment can be replaced with the configuration of another embodiment.
- some of the configuration of an embodiment can be deleted.
- the positive electrode in which the active material layer containing the active material is in direct contact with the metal foil has been described in detail, but in the present invention, the positive electrode is a conductive layer containing a binder and a conductive additive and the active material layer And the metal foil may have a conductive layer.
- the active material layer was described for the electrodes disposed on both sides of the metal foil of each electrode, but in the lithium ion secondary battery of the present invention, the positive electrode or the negative electrode has the active material layer of metal foil. It may be provided only on one side.
- the lithium ion secondary battery 1 including the electrode assembly 2 in which the laminate 22 is wound is described in detail in the above embodiment, the lithium ion secondary battery of the present invention includes the laminate 22 not wound. May be Specifically, the lithium ion secondary battery may include an electrode body in which a positive electrode, a separator, a negative electrode, and a separator, each formed in a rectangular shape, are stacked a plurality of times in this order. The shape and size (capacity) of the lithium ion secondary battery 1 are arbitrary.
- the upper limit of the normal working voltage of the lithium ion secondary battery 1 is designed to 3.6 V, and a storage device in which a plurality of such lithium ion secondary batteries 1 are connected in series, preferably four in series is designed
- the storage device can be used as a substitute for a lead storage battery because the compatibility with a conventional automotive power supply equipped with a lead storage battery occurs.
- a power storage device as a substitute for a lead storage battery, deep discharge which can not be achieved by a lead storage battery is possible, and in addition, weight reduction can be achieved.
- a lithium ion secondary battery was manufactured as shown below.
- Test Example 1 (1) Preparation of Positive Electrode N-methyl-2-pyrrolidone (NMP) as a solvent, conductive auxiliary (acetylene black), binder (PVdF), and active material (LiNi 1/3 having a median diameter of 4.0 ⁇ m)
- NMP Positive Electrode N-methyl-2-pyrrolidone
- conductive auxiliary acetylene black
- binder PVdF
- active material LiNi 1/3 having a median diameter of 4.0 ⁇ m
- the composition for positive electrodes was prepared by mixing and kneading particles of Co 1/3 Mn 1/3 O 2 ).
- the blending amounts of the conductive additive, the binder, and the active material were 4.5% by mass, 2.5% by mass, and 93% by mass, respectively.
- the prepared positive electrode composition was applied to both sides of an aluminum foil (12 ⁇ m thick) so that the basis weight of the dried positive electrode active material layer was 5.3 mg / cm 2 (positive electrode active in this case)
- the weight per unit area (P) of the substance is 4.93 mg / cm 2 ).
- roll pressing was performed. Thereafter, it was vacuum dried to remove water and the like.
- the thickness of the active material layer (one layer) after pressing was 19 ⁇ m.
- the density of the active material layer was 2.8 g / cm 3 .
- Negative Electrode As the active material, particulate non-graphitic carbon (non-graphitizable carbon) having a median diameter of 4 ⁇ m was used. Moreover, PVdF was used as a binder. A composition for a negative electrode was prepared by mixing and kneading water as a solvent, a binder, and an active material. The binder was blended so as to be 4% by mass, and the active material was blended so as to be 96% by mass.
- the prepared negative electrode composition was applied to both sides of an aluminum foil (12 ⁇ m in thickness) such that the basis weight of the dried negative electrode active material layer was 5.64 mg / cm 2 (in this case, the negative electrode active)
- the weight per unit area (N) of the substance is 5.42 mg / cm 2 ).
- the thickness of the active material layer (one layer) after pressing was 86 ⁇ m.
- the density of the active material layer was 1.1 g / cm 3 .
- the coating weight of the negative electrode active material layer was set such that the potential of the negative electrode when the upper limit charging voltage of the battery was 3.6 V was 400 mV in lithium potential.
- Separator (Separator base material) A polyethylene microporous film with a thickness of 22 ⁇ m was used as a separator substrate. The air resistance of the microporous polyethylene membrane was 100 seconds / 100 cc.
- Electrolytic solution As an electrolytic solution, one prepared by the following method was used.
- a non-aqueous solvent a solvent in which 1 part by volume each of propylene carbonate, dimethyl carbonate and ethyl methyl carbonate is mixed is used, and LiPF 6 is dissolved in this non-aqueous solvent so that the salt concentration is 1 mol / L, An electrolyte was prepared.
- a battery was assembled by a general method using the above positive electrode, the above negative electrode, the above electrolyte, a separator and a case.
- a sheet-like product in which a separator is disposed and laminated between the positive electrode and the negative electrode was wound.
- the wound electrode body was placed in the case main body of an aluminum rectangular battery case as a case.
- the positive electrode and the negative electrode were electrically connected to each of the two external terminals.
- a cover plate was attached to the case body.
- the above-mentioned electrolytic solution was injected into the case from a liquid injection port formed in the cover plate of the case.
- the case was sealed by sealing the liquid inlet of the case.
- the ratio of the weight of the positive electrode active material to the weight of the negative electrode active material was 0.91.
- the coating weight of the negative electrode active material layer is in the range of 3.11 to 10.07 mg / cm 2 so that the P / N ratio shown in Table 1 can be obtained without changing the coating weight of the positive electrode active material layer and the positive electrode active material.
- a lithium ion secondary battery was manufactured in the same manner as in Example 1 except that the above was changed.
- Test Example 8 The active material of the positive electrode was changed to an active material having a chemical composition of LiNi 0.55 Co 0.20 Mn 0.25 O 2 so that the basis weight of the negative electrode active material layer was 6.34 mg / cm 2 and the positive electrode active material layer was A lithium ion secondary battery was manufactured in the same manner as Example 1, except that the basis weight was changed to 5.30 mg / cm 2 and the like.
- the active material of the positive electrode was changed to an active material having the chemical composition shown in Table 1, and the basis weight of the negative electrode active material layer was changed in the range of 1.50 to 2.31 mg / cm 2 to A lithium ion secondary battery was manufactured in the same manner as Example 1, except that the basis weight was changed to 5.30 mg / cm 2 and the like.
- the lithium ion secondary battery having the above P / N ratio of 0.65 or more and 1.05 or less has resistance to overcharge and relatively high standing durability Had sex.
- lithium ion secondary batteries with the above P / N ratio of less than 0.65 or greater than 1.05 do not have resistance to overcharge or do not have sufficient storage durability.
- the If the P / N ratio is less than 0.65 it is considered that the durability is lowered due to the potential of the positive electrode becoming relatively noble and the like.
- the above P / N ratio exceeds 1.05 it is considered that polarization occurs at the negative electrode during charge, Li electrodeposition tends to occur, and the resistance to overcharge is lowered.
- the negative electrode active material is non-graphitizable carbon, the potential of the negative electrode is relatively noble, and it is considered that the thermal stability in the overcharge is secured.
- Lithium ion secondary battery non-aqueous electrolyte secondary battery
- 2 Electrode body
- 3 Case 31: Case body 32: Lid plate
- 5 Current collecting member
- 6 Insulating cover
- 7 External terminal 71: face.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
正極の活物質が上記組成のリチウム遷移金属酸化物であり、且つ、上記の充電容量が上記数値範囲内であることによって、負極に用いた炭素材料(難黒鉛化炭素)の充放電容量との関係上、過充電に対する耐性を有すること、及び、比較的高い放置耐久性を有することの両方を達成できる。
一方で、上記の比(P/N)が0.65未満であると、耐久性が不十分となるおそれがあり、1.05を超えると、負極でLiイオンの受入性が低下したり負極の熱安定性が低下したりすることで過充電に対する耐性が不十分となるおそれがある。
(1)正極の作製
溶媒としてのN-メチル-2-ピロリドン(NMP)と、導電助剤(アセチレンブラック)と、バインダ(PVdF)と、メジアン径が4.0μmの活物質(LiNi1/3Co1/3Mn1/3O2)の粒子とを、混合し、混練することで、正極用の組成物を調製した。導電助剤、バインダ、活物質の配合量は、それぞれ4.5質量%、2.5質量%、93質量%とした。調製した正極用の組成物を、乾燥後の正極活物質層の目付量が5.3mg/cm2となるように、アルミニウム箔(厚さ12μm)の両面にそれぞれ塗布した(この場合の正極活物質の目付量(P)は、4.93mg/cm2)。加熱による乾燥後、ロールプレスを行った。その後、真空乾燥して、水分等を除去した。プレス後の活物質層(1層分)の厚さは、19μmであった。活物質層の密度は、2.8g/cm3であった。
活物質としては、メジアン径が4μmの粒子状の非黒鉛質炭素(難黒鉛化炭素)を用いた。また、バインダとしては、PVdFを用いた。溶媒としての水と、バインダと、活物質とを混合し、混練することで、負極用の組成物を調製した。バインダは、4質量%となるように配合し、活物質は、96質量%となるように配合した。調製した負極用の組成物を、乾燥後の負極活物質層の目付量が5.64mg/cm2となるように、アルミニウム箔(厚さ12μm)の両面にそれぞれ塗布した(この場合の負極活物質の目付量(N)は、5.42mg/cm2)。加熱による乾燥後、ロールプレスを行った。その後、真空乾燥して、水分等を除去した。プレス後の活物質層(1層分)の厚さは、86μmであった。活物質層の密度は、1.1g/cm3であった。
なお、電池の上限充電電圧を3.6Vとしたときの負極の電位が、リチウム電位で400mVとなるように、負極活物質層の目付量を設定した。
セパレータ基材として厚さが22μmのポリエチレン製微多孔膜を用いた。ポリエチレン製微多孔膜の透気抵抗度は、100秒/100ccであった。
電解液としては、以下の方法で調製したものを用いた。非水溶媒として、プロピレンカーボネート、ジメチルカーボネート、エチルメチルカーボネートを、いずれも1容量部ずつ混合した溶媒を用い、この非水溶媒に、塩濃度が1mol/LとなるようにLiPF6を溶解させ、電解液を調製した。
上記の正極、上記の負極、上記の電解液、セパレータ、及びケースを用いて、一般的な方法によって電池を組み立てた。
まず、セパレータが上記の正極および負極の間に配されて積層されてなるシート状物を巻回した。次に、巻回されてなる電極体を、ケースとしてのアルミニウム製の角形電槽缶のケース本体内に配置した。続いて、正極及び負極を2つの外部端子それぞれに電気的に接続させた。さらに、ケース本体に蓋板を取り付けた。上記の電解液を、ケースの蓋板に形成された注液口からケース内に注入した。最後に、ケースの注液口を封止することにより、ケースを密閉した。
負極活物質の目付量(N)に対する、正極活物質の目付量(P)の比(P/N)は、0.91であった。
正極活物質層および正極活物質の各目付量を変えずに、表1に示すP/N比になるように、負極活物質層の目付量を3.11~10.07mg/cm2の範囲で変更した点等以外は、実施例1と同様にして、リチウムイオン二次電池を製造した。
正極の活物質をLiNi0.55Co0.20Mn0.25O2の化学組成の活物質に変更し、負極活物質層の目付量を6.34mg/cm2に、正極活物質層の目付量を5.30mg/cm2に変更した点等以外は、実施例1と同様にして、リチウムイオン二次電池を製造した。
正極の活物質を表1に示す化学組成の活物質に変えた点、また、負極活物質層の目付量を1.50~2.31mg/cm2の範囲で変更し、正極活物質層の目付量を5.30mg/cm2に変更した点等以外は、実施例1と同様にしてリチウムイオン二次電池を製造した。
25℃において3A定電流で3.6Vまで各電池を充電し、さらにその電圧で低電圧充電を合計3時間充電した。その後、25℃において、60A定電流で、終止電圧20Vの条件で過充電試験を実施した。斯かる試験において、最高温度を測定した。
各電池を、3A定電流、終止電圧2.4Vの条件で放電した後、3A定電流で3.6Vまで充電し、さらに3.6V定電圧で合計3時間充電した後、3A定電流で、終止電圧2.4Vの条件で放電することにより初期放電容量を測定した。その後、各電池を25℃において3A定電流で3.6Vまで充電し、さらにその電圧で低電圧充電を合計3時間おこなった。65℃の恒温槽中において30日間(1ヶ月間)保管した。25℃で4h保持した後、上述した方法と同様の方法で放電容量を測定した。合計90日間放置をおこない、90日後の放電容量維持率を算出した。
上記のP/N比が0.65未満であると、正極の電位が比較的貴になったこと等によって、耐久性が低くなったと考えられる。一方、上記のP/N比が1.05を超えると、充電時に負極で分極が発生してLi電析が生じやすくなり、過充電に対する耐性が低くなったと考えられる。なお、負極活物質が難黒鉛化炭素であるため、負極の電位が比較的貴であり、過充電における熱安定性が確保されたと考えられる。
2:電極体、
3:ケース、 31:ケース本体、 32:蓋板、
5:集電部材、
6:絶縁カバー、
7:外部端子、 71:面。
Claims (2)
- LiaNixCoyMzO2(0.9≦a≦1.2,0.3≦x≦0.8,0.2≦y+z≦0.7,x+y+z=1,MはLi,Ni,Co以外の金属元素)を正極活物質として含有する正極と、
非黒鉛質炭素を負極活物質として含有する負極と、を有し、
前記正極及び前記負極が互いに対向する部分において、前記正極活物質の目付量(P)と前記負極活物質の目付量(N)とが、0.65≦P/N≦1.05の関係式を満たす、リチウムイオン二次電池。 - 前記リチウムイオン二次電池の充電電圧を3.6Vとしたときの前記負極の電位が、リチウム電位で300mV以上500mV以下である、請求項1に記載のリチウムイオン二次電池。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201880075741.2A CN111448701B (zh) | 2017-11-22 | 2018-11-21 | 锂离子二次电池 |
| EP18881216.8A EP3712998B1 (en) | 2017-11-22 | 2018-11-21 | Lithium ion secondary battery |
| US16/765,203 US11621417B2 (en) | 2017-11-22 | 2018-11-21 | Lithium ion secondary battery |
| JP2019555331A JP7240640B2 (ja) | 2017-11-22 | 2018-11-21 | リチウムイオン二次電池 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017224745 | 2017-11-22 | ||
| JP2017-224745 | 2017-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019103031A1 true WO2019103031A1 (ja) | 2019-05-31 |
Family
ID=66632062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/042965 Ceased WO2019103031A1 (ja) | 2017-11-22 | 2018-11-21 | リチウムイオン二次電池 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11621417B2 (ja) |
| EP (1) | EP3712998B1 (ja) |
| JP (1) | JP7240640B2 (ja) |
| CN (1) | CN111448701B (ja) |
| WO (1) | WO2019103031A1 (ja) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004288405A (ja) | 2003-03-20 | 2004-10-14 | Ngk Insulators Ltd | リチウム二次電池 |
| JP2007042525A (ja) * | 2005-08-05 | 2007-02-15 | Hitachi Vehicle Energy Ltd | リチウムイオン電池 |
| JP2007134218A (ja) * | 2005-11-11 | 2007-05-31 | Kansai Electric Power Co Inc:The | 非水電解質二次電池 |
| JP2009199929A (ja) * | 2008-02-22 | 2009-09-03 | Hitachi Ltd | リチウム二次電池 |
| WO2013128676A1 (ja) * | 2012-02-29 | 2013-09-06 | 新神戸電機株式会社 | リチウムイオン電池 |
Family Cites Families (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09283117A (ja) | 1996-04-12 | 1997-10-31 | Toyota Motor Corp | リチウムイオン二次電池 |
| JPH10241670A (ja) | 1997-02-25 | 1998-09-11 | Sanyo Electric Co Ltd | 非水電解質二次電池用電極及びその製造方法 |
| JP4563555B2 (ja) * | 2000-07-04 | 2010-10-13 | シャープ株式会社 | リチウム二次電池 |
| JP3619125B2 (ja) | 2000-07-21 | 2005-02-09 | 株式会社東芝 | 非水電解質二次電池 |
| KR100560539B1 (ko) | 2003-11-17 | 2006-03-15 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 음극 및 이를 포함하는 리튬 이차 전지 |
| KR100560546B1 (ko) | 2003-11-27 | 2006-03-15 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 음극 및 이를 포함하는 리튬 이차 전지 |
| US7811705B2 (en) * | 2004-10-29 | 2010-10-12 | Medtronic, Inc. | Lithium-ion battery |
| EP1865520B1 (en) | 2005-03-31 | 2013-06-05 | Fuji Jukogyo Kabushiki Kaisha | Lithium ion capacitor |
| KR100908571B1 (ko) * | 2005-11-15 | 2009-07-22 | 주식회사 엘지화학 | 안전성과 저온 출력 특성이 우수한 리튬 이차전지 |
| CA2535064A1 (fr) | 2006-02-01 | 2007-08-01 | Hydro Quebec | Materiau multi-couches, procede de fabrication et utilisation comme electrode |
| JP4971729B2 (ja) * | 2006-09-04 | 2012-07-11 | 富士重工業株式会社 | リチウムイオンキャパシタ |
| JP5160159B2 (ja) | 2007-07-18 | 2013-03-13 | 第一工業製薬株式会社 | リチウム二次電池 |
| CN101689676A (zh) * | 2007-07-18 | 2010-03-31 | 第一工业制药株式会社 | 锂二次电池 |
| AU2009233974B2 (en) | 2008-04-07 | 2013-10-17 | Carnegie Mellon University | Sodium ion based aqueous electrolyte electrochemical secondary energy storage device |
| JP2010095390A (ja) | 2008-09-16 | 2010-04-30 | Tokyo Institute Of Technology | メソポーラス炭素複合材料およびこれを用いた二次電池 |
| JP5359442B2 (ja) | 2009-03-25 | 2013-12-04 | 住友化学株式会社 | ナトリウムイオン電池 |
| JP2010282836A (ja) | 2009-06-04 | 2010-12-16 | Nissan Motor Co Ltd | リチウムイオン二次電池 |
| CN101621214B (zh) * | 2009-07-28 | 2012-09-19 | 成都市华为赛门铁克科技有限公司 | 电池备份模块、电池备份模块的供电方法及存储系统 |
| JP2012164571A (ja) | 2011-02-08 | 2012-08-30 | Sumitomo Electric Ind Ltd | 負極体及びリチウムイオン電池 |
| JP5782616B2 (ja) | 2011-02-23 | 2015-09-24 | エス・イー・アイ株式会社 | リチウム二次電池 |
| US20140065491A1 (en) | 2011-04-26 | 2014-03-06 | Showa Denko K.K. | Secondary battery |
| JP5647063B2 (ja) | 2011-05-10 | 2014-12-24 | 株式会社アルバック | リチウムイオン二次電池の負極構造及びリチウムイオン二次電池の負極構造の製造方法 |
| KR101336070B1 (ko) | 2011-07-13 | 2013-12-03 | 주식회사 엘지화학 | 에너지 밀도 특성이 향상된 고 에너지 리튬 이차전지 |
| HUE032780T2 (en) * | 2011-10-11 | 2017-10-30 | Connexx Systems Corp | Hybrid storage cell, vehicle and power storage unit employing same, smart grid vehicle system employing vehicle, and power supply network system employing power storage unit |
| JP6120772B2 (ja) * | 2011-10-28 | 2017-04-26 | 旭化成株式会社 | 非水系二次電池 |
| US9680272B2 (en) | 2012-02-17 | 2017-06-13 | Semiconductor Energy Laboratory Co., Ltd. | Method for forming negative electrode and method for manufacturing lithium secondary battery |
| JP2014103087A (ja) | 2012-04-17 | 2014-06-05 | Sumitomo Electric Ind Ltd | ナトリウム二次電池 |
| JP6119755B2 (ja) | 2012-09-10 | 2017-05-10 | 住友電気工業株式会社 | ナトリウム二次電池 |
| JP6064825B2 (ja) | 2013-07-26 | 2017-01-25 | 住友電気工業株式会社 | ナトリウム溶融塩電池 |
| JP2015088286A (ja) * | 2013-10-30 | 2015-05-07 | 株式会社船井電機新応用技術研究所 | 蓄電デバイスおよび蓄電デバイス制御装置 |
| JP6219715B2 (ja) * | 2013-12-25 | 2017-10-25 | トヨタ自動車株式会社 | 非水電解液二次電池 |
| JP6217434B2 (ja) | 2014-02-13 | 2017-10-25 | 住友電気工業株式会社 | ナトリウム溶融塩電池 |
| JP2016018654A (ja) * | 2014-07-08 | 2016-02-01 | 株式会社日立製作所 | リチウムイオン二次電池 |
| JP6103315B2 (ja) * | 2014-10-03 | 2017-03-29 | トヨタ自動車株式会社 | 非水系二次電池および該電池の製造方法 |
| JP2016091927A (ja) | 2014-11-10 | 2016-05-23 | 日立化成株式会社 | リチウムイオン二次電池 |
| JP6128396B2 (ja) * | 2014-12-10 | 2017-05-17 | トヨタ自動車株式会社 | 非水電解質二次電池と当該電池用の正極活物質 |
-
2018
- 2018-11-21 WO PCT/JP2018/042965 patent/WO2019103031A1/ja not_active Ceased
- 2018-11-21 CN CN201880075741.2A patent/CN111448701B/zh active Active
- 2018-11-21 JP JP2019555331A patent/JP7240640B2/ja active Active
- 2018-11-21 US US16/765,203 patent/US11621417B2/en active Active
- 2018-11-21 EP EP18881216.8A patent/EP3712998B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004288405A (ja) | 2003-03-20 | 2004-10-14 | Ngk Insulators Ltd | リチウム二次電池 |
| JP2007042525A (ja) * | 2005-08-05 | 2007-02-15 | Hitachi Vehicle Energy Ltd | リチウムイオン電池 |
| JP2007134218A (ja) * | 2005-11-11 | 2007-05-31 | Kansai Electric Power Co Inc:The | 非水電解質二次電池 |
| JP2009199929A (ja) * | 2008-02-22 | 2009-09-03 | Hitachi Ltd | リチウム二次電池 |
| WO2013128676A1 (ja) * | 2012-02-29 | 2013-09-06 | 新神戸電機株式会社 | リチウムイオン電池 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3712998A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20200295364A1 (en) | 2020-09-17 |
| JPWO2019103031A1 (ja) | 2020-11-19 |
| JP7240640B2 (ja) | 2023-03-16 |
| EP3712998B1 (en) | 2025-04-30 |
| US11621417B2 (en) | 2023-04-04 |
| CN111448701A (zh) | 2020-07-24 |
| CN111448701B (zh) | 2025-06-06 |
| EP3712998A1 (en) | 2020-09-23 |
| EP3712998A4 (en) | 2021-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104051778B (zh) | 非水电解质二次电池 | |
| CN109075317B (zh) | 蓄电元件及其制造方法 | |
| JPWO2018043375A1 (ja) | 蓄電素子およびその製造方法 | |
| US8980482B2 (en) | Nonaqueous electrolyte lithium ion secondary battery | |
| CN111725555B (zh) | 锂离子二次电池 | |
| JP2017168302A (ja) | 蓄電素子 | |
| JP6880488B2 (ja) | リチウムイオン二次電池 | |
| CN109844999B (zh) | 蓄电元件和蓄电元件的制造方法 | |
| JP7008275B2 (ja) | 蓄電素子 | |
| JP6778396B2 (ja) | 非水電解質二次電池 | |
| JP6880496B2 (ja) | 蓄電素子 | |
| JP2017107796A (ja) | 非水電解質二次電池 | |
| JP7249520B2 (ja) | 蓄電素子及び蓄電装置 | |
| JP2016186886A (ja) | 蓄電素子 | |
| JP6701510B2 (ja) | 非水電解質二次電池 | |
| JP7240640B2 (ja) | リチウムイオン二次電池 | |
| JP2017183082A (ja) | 蓄電素子 | |
| JP2018120829A (ja) | 蓄電素子 | |
| JP6853944B2 (ja) | 蓄電素子 | |
| JP7702988B2 (ja) | リチウムイオン二次電池およびその製造方法 | |
| JP6946617B2 (ja) | 蓄電素子 | |
| JP7752656B2 (ja) | 非水電解液二次電池および非水電解液二次電池の製造方法 | |
| JP7296042B2 (ja) | 非水電解液二次電池 | |
| JP6781945B2 (ja) | 蓄電装置の製造方法 | |
| WO2024127668A1 (ja) | 非水電解質電池及び電池パック |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18881216 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2019555331 Country of ref document: JP Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2018881216 Country of ref document: EP Effective date: 20200618 |
|
| WWG | Wipo information: grant in national office |
Ref document number: 2018881216 Country of ref document: EP |
|
| WWG | Wipo information: grant in national office |
Ref document number: 201880075741.2 Country of ref document: CN |