WO2012124093A1 - 非水電解質二次電池および車両 - Google Patents
非水電解質二次電池および車両 Download PDFInfo
- Publication number
- WO2012124093A1 WO2012124093A1 PCT/JP2011/056307 JP2011056307W WO2012124093A1 WO 2012124093 A1 WO2012124093 A1 WO 2012124093A1 JP 2011056307 W JP2011056307 W JP 2011056307W WO 2012124093 A1 WO2012124093 A1 WO 2012124093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- resistant layer
- secondary battery
- separator
- electrolyte secondary
- Prior art date
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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
-
- 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
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/443—Particulate material
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/451—Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- Non-aqueous electrolyte secondary batteries such as lithium ion secondary batteries are attracting attention as power sources mounted on vehicles using a motor as a driving source, or power sources mounted on personal computers, portable terminals, and other electrical products, for example. .
- the non-aqueous electrolyte secondary battery includes an electrode body having a positive electrode, a negative electrode, and a porous separator interposed between the positive electrode and the negative electrode.
- the separator plays a role of preventing a short circuit due to contact between the positive electrode and the negative electrode.
- the separator plays a role of forming an ion conduction path (conduction path) between the two electrodes by impregnating the electrolyte in the pores of the separator.
- a film having a porous resin layer made of polyethylene (PE), polypropylene (PP) or the like has been used as a separator.
- PE polyethylene
- PP polypropylene
- Such a function of the separator is called a shutdown function. Since the separator has a shutdown function, overheating of the battery is prevented.
- Patent Document 1 discloses such a separator.
- a non-aqueous electrolyte secondary battery used as a power source for a vehicle drive source or the like requires excellent high-rate discharge characteristics.
- the porosity of the heat-resistant layer is small, the ionic conductivity of the separator tends to decrease.
- the porosity of the heat-resistant layer is large.
- Patent Document 1 describes that the porosity of the heat-resistant layer is 40 to 60%.
- the porosity of the heat-resistant layer is increased, the contact area between the heat-resistant layer and the resin layer is reduced, so that the peel strength of the heat-resistant layer tends to be reduced.
- the heat-resistant layer may be peeled off from the resin layer due to the energy released along with the occurrence of the short circuit. In that case, the thermal contraction of the resin layer cannot be suppressed, and the internal short circuit may spread.
- An object of the present invention is to provide a non-aqueous electrolyte secondary battery that has excellent high-rate discharge characteristics, does not easily cause an internal short circuit, and is easy to assemble accurately.
- a nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and at least a nonaqueous electrolyte impregnated in the separator.
- the separator has a porous resin layer and a porous heat-resistant layer laminated on at least one surface of the resin layer.
- the heat-resistant layer includes a filler made of an inorganic material and a binder.
- the porosity of the heat-resistant layer is 55% or more.
- the 90-degree peel strength of the heat-resistant layer with respect to the resin layer is 2.9 N / m to 15.1 N / m.
- non-aqueous electrolyte secondary battery refers to a secondary battery including a non-aqueous electrolyte (typically, an electrolyte containing a supporting salt (supporting electrolyte) in a non-aqueous solvent).
- a non-aqueous electrolyte typically, an electrolyte containing a supporting salt (supporting electrolyte) in a non-aqueous solvent.
- the porosity of the heat-resistant layer is 55% to 68%. Thereby, more excellent high rate discharge characteristics can be obtained.
- the 90-degree peel strength of the heat-resistant layer with respect to the resin layer is 6 N / m to 15.1 N / m. This improves the durability of the non-aqueous electrolyte secondary battery.
- the filler has an average particle size of 0.3 ⁇ m to 0.7 ⁇ m.
- the filler may have an average particle size of 0.3 ⁇ m to 0.5 ⁇ m. Thereby, the peel strength of the heat-resistant layer can be further increased.
- the weight ratio of the filler to the binder is 93: 7 to 95: 5. Thereby, the peel strength of the heat-resistant layer can be further increased.
- the material of the filler is not particularly limited, and may be made of at least one material selected from the group consisting of alumina, boehmite, magnesium hydroxide, and magnesium carbonate, for example.
- the positive electrode, the separator, and the negative electrode may be overlapped with each other and wound. This is because the separator has sufficient flexibility, so that the positive electrode, the separator, and the negative electrode are unlikely to be wound.
- a vehicle including the non-aqueous electrolyte secondary battery as a driving power source. Since the non-aqueous electrolyte secondary battery has excellent high rate discharge characteristics, it can be suitably used as a power source for driving a vehicle.
- FIG. 1 shows a lithium ion secondary battery 10 as a nonaqueous electrolyte secondary battery according to an embodiment of the present invention.
- the lithium ion secondary battery 10 has a configuration in which the electrode body 11 is accommodated in the battery case 15 together with the nonaqueous electrolytic solution 20.
- the electrode body 11 includes a positive electrode 12, a negative electrode 14, and a separator 13. At least a part of the nonaqueous electrolytic solution 20 is impregnated in the electrode body 11.
- the positive electrode 12 has a long sheet-like positive electrode current collector 122 and a positive electrode mixture layer 124 containing a positive electrode active material and provided on the positive electrode current collector 122.
- the negative electrode 14 includes a long sheet-like negative electrode current collector 142 and a negative electrode mixture layer 144 that includes a negative electrode active material and is provided on the negative electrode current collector 142.
- the separator 13 is formed in a long sheet shape.
- the positive electrode 12 and the negative electrode 14 are wound in a cylindrical shape together with the two separators 13 so that the separator 13 is interposed therebetween.
- the shape of the electrode body 11 after winding is not restricted to a cylindrical shape.
- a flat shape may be formed by applying a force from the side.
- the battery case 15 includes a bottomed cylindrical case main body 152 and a lid 154 that closes the opening of the case main body 152.
- the lid 154 and the case main body 152 are both made of metal and insulated from each other.
- the lid 154 is electrically connected to the positive electrode current collector 122, and the case body 152 is electrically connected to the negative electrode current collector 142.
- the lid 154 also serves as a positive electrode terminal, and the case main body 152 serves as a negative electrode terminal.
- the non-aqueous electrolyte solution contains a lithium salt as a supporting salt in an organic solvent (non-aqueous solvent).
- a lithium salt for example, a known lithium salt conventionally used as a supporting salt for a non-aqueous electrolyte solution of a lithium ion secondary battery can be appropriately selected and used. Examples of such lithium salts include LiPF 6 , LiBF 4 , LiClO 4 , LiAsF 6 , Li (CF 3 SO 2 ) 2 N, LiCF 3 SO 3 and the like.
- the non-aqueous solvent an organic solvent used in a general lithium ion secondary battery can be appropriately selected and used. Particularly preferred non-aqueous solvents include carbonates such as ethylene carbonate (EC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), diethyl carbonate (DEC), and propylene carbonate (PC).
- a conductive member made of a highly conductive metal is preferably used.
- aluminum or an alloy containing aluminum as a main component can be used.
- the positive electrode mixture layer 124 can contain a conductive material, a binder (binder), and the like as necessary.
- a material capable of inserting and extracting lithium is used, and one or more of materials conventionally used in lithium ion secondary batteries (for example, a layered oxide or a spinel oxide) Can be used without any particular limitation. Examples thereof include lithium-containing composite oxides such as lithium nickel composite oxides, lithium cobalt composite oxides, lithium manganese composite oxides, and lithium magnesium composite oxides.
- the conductive material for example, carbon materials such as carbon black (for example, acetylene black) and graphite powder can be preferably used.
- carbon materials such as carbon black (for example, acetylene black) and graphite powder
- binder polyvinylidene fluoride (PVDF), carboxymethyl cellulose (CMC), styrene butadiene rubber (SBR), or the like can be used.
- a conductive member made of a highly conductive metal is preferably used.
- copper or an alloy containing copper as a main component can be used.
- the negative electrode mixture layer 144 can contain the same conductive material, binder, and the like as the positive electrode mixture layer 124 as necessary.
- the negative electrode active material one type or two or more types of materials conventionally used in lithium ion secondary batteries can be used without any particular limitation.
- a carbon particle is mentioned as a suitable negative electrode active material.
- a particulate carbon material (carbon particles) containing a graphite structure (layered structure) at least partially is preferably used. Any carbon material of a so-called graphitic material (graphite), non-graphitizable carbon material (hard carbon), easily graphitized carbon material (soft carbon), or a combination of these materials is preferably used. Can be done.
- the separator 13 is formed in a long sheet shape.
- the shape of the separator 13 may vary depending on the shape of the lithium ion secondary battery, it is not particularly limited to a sheet shape.
- the shapes of the positive electrode 12 and the negative electrode 14 are not limited to a sheet shape.
- FIG. 2 shows a separator 13 according to one embodiment
- FIG. 3 shows a separator 13 according to another embodiment
- the separator 13 includes a porous resin layer 60 and a porous heat-resistant layer 70 formed on the surface of the resin layer 60.
- the heat resistant layer 70 plays a role such as suppressing the thermal contraction of the resin layer 60 and preventing an internal short circuit of the battery due to the film breakage of the resin layer 60.
- the heat-resistant layer 70 may be provided only on one surface of the resin layer 60, or may be provided on both surfaces.
- the resin layer 60 As a material of the resin layer 60, for example, a polyolefin resin such as PE (polyethylene) or PP (polypropylene) can be suitably used.
- the structure of the resin layer 60 may be a single layer structure or a multilayer structure.
- FIG. 2 shows an example of the separator 13 having the resin layer 60 having a three-layer structure.
- the resin layer 60 includes a PP layer 61, a PE layer 62 laminated on the PP layer 61, and a PP layer 63 laminated on the PE layer 62.
- the number of layers in the multilayer structure is not limited to 3, and may be 2 or 4 or more.
- FIG. 3 shows an example of the separator 13 having the resin layer 60 having a single layer structure.
- the resin layer 60 is constituted by a PE layer 62.
- a uniaxially or biaxially stretched porous resin film can be suitably used.
- a porous resin film uniaxially stretched in the longitudinal direction is particularly preferable because it has an appropriate strength and has little heat shrinkage in the width direction.
- thermal contraction in the longitudinal direction can be suppressed in a mode in which the separator is wound together with a long sheet-like positive electrode and negative electrode. Therefore, the porous resin film uniaxially stretched in the longitudinal direction is particularly suitable as one element of the separator constituting such a wound electrode body.
- the thickness of the resin layer 60 is not particularly limited, but typically about 10 ⁇ m to 30 ⁇ m is preferable. If the thickness of the resin layer 60 is too large, the ion conductivity of the separator 13 tends to decrease, and if the thickness of the resin layer 60 is too small, a tendency of film breakage tends to occur. In addition, the thickness of the resin layer 60 can be calculated
- the heat-resistant layer 70 includes an inorganic oxide or inorganic hydroxide filler (filler) and a binder.
- the heat-resistant layer 70 can be formed by preparing a composition for forming a heat-resistant layer by mixing a filler, a binder, and a solvent, and applying the composition to the surface of the resin layer 60 and drying it.
- particles made of an inorganic oxide or an inorganic hydroxide having high electrical insulation and a melting point higher than those of the PP layers 61 and 63 and the PE layer 62 can be suitably used.
- particles made of an inorganic oxide or an inorganic hydroxide having high electrical insulation and a melting point higher than those of the PP layers 61 and 63 and the PE layer 62 can be suitably used.
- one or two or more selected from alumina, boehmite, magnesium hydroxide, magnesium carbonate, magnesia, titania, silica, zirconia, zinc oxide, iron oxide, ceria, yttria, etc. are used in the form of particles. be able to.
- the form of the filler is not particularly limited, and may be in the form of particles, fibers, flakes, and the like.
- a particulate filler is used.
- the average particle size of the filler can be, for example, about 0.15 ⁇ m to 2 ⁇ m, preferably 0.3 ⁇ m to 0.7 ⁇ m, and more preferably 0.3 ⁇ m to 0.5 ⁇ m.
- the specific surface area of the filler can be, for example, about 2 m 2 / g to 13 m 2 / g.
- the "average particle size" particle diameter at an integrated value of 50% in the particle size distribution determined by laser diffraction-scattering method is intended to mean (hereinafter sometimes abbreviated as D 50) .
- binder examples include acrylic resins (for example, those mainly composed of acrylic ester polymers), styrene butadiene rubber (SBR), polyolefin resins such as PE and PP, carboxymethyl cellulose (CMC), and the like.
- SBR styrene butadiene rubber
- CMC carboxymethyl cellulose
- binders can be used alone or in combination of two or more.
- the form of the binder is not particularly limited, and a particulate (powdered) form may be used as it is, or a solution or emulsion prepared may be used. Two or more kinds of binders may be used in different forms.
- the average particle size is not particularly limited. For example, those having an average particle size of about 0.05 ⁇ m to 0.5 ⁇ m can be used.
- the blending ratio of the filler and the binder is, for example, 90:10 to 99: 1 in terms of mass ratio (NV basis), preferably 93: 7 to 97: 3, and more preferably 93: 7 to 95: 5. If the blending amount of the binder is too small, the anchoring property of the heat-resistant layer 70 and the strength (shape retention) of the heat-resistant layer 70 itself are lowered, and problems such as cracks and peeling off may occur. If the amount of the binder is too large, the porosity of the heat-resistant layer 70 may decrease, or the ion permeability of the separator 13 may decrease.
- the total amount of filler and binder in the entire mass of the heat-resistant layer 70 is approximately 90% by mass or more (for example, 95% or more).
- the heat-resistant layer 70 substantially composed of only a filler and a binder may be used.
- the solvent for dissolving or dispersing the filler and binder is not particularly limited.
- water alcohols such as ethanol, N-methyl-2-pyrrolidone (NMP), toluene, dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) Etc., and can be used as appropriate.
- alcohols such as ethanol, N-methyl-2-pyrrolidone (NMP), toluene, dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) Etc.
- NMP N-methyl-2-pyrrolidone
- DMC dimethyl carbonate
- EMC ethyl methyl carbonate
- the solid content of the heat-resistant layer forming composition is, for example, about 30% by mass to 50% by mass.
- the solid content is typically about 40% by weight for solvent-based materials and 50% to 52% by weight for water-based materials.
- the solid content is not limited to the above numerical values.
- the method for applying the heat-resistant layer forming composition to the resin layer 60 is not particularly limited.
- a die coater, gravure roll coater, reverse roll coater, kiss roll coater, dip roll coater, bar coater, air knife coater, spray coater, A brush coater, a screen coater or the like can be used.
- the drying step after coating can be performed by appropriately selecting a conventionally known method. For example, a method of holding and drying at a temperature lower than the melting point of the PE layer 62 (for example, about 70 ° C. to 100 ° C.) or a method of holding and drying at a low temperature under reduced pressure may be used.
- the thickness of the heat-resistant layer 70 after drying can be, for example, about 1 ⁇ m to 12 ⁇ m, and preferably about 2 ⁇ m to 8 ⁇ m. If the thickness of the heat-resistant layer 70 is too large, the handleability and workability of the separator 13 may be reduced, and defects such as cracks and peeling may easily occur. If the thickness of the heat-resistant layer 70 is too small, the short-circuit prevention effect may be reduced, or the amount of electrolyte that can be retained may be reduced.
- the thickness of the heat-resistant layer 70 can be obtained by image analysis of an image taken with a scanning electron microscope (SEM).
- the porosity of the heat-resistant layer 70 is 55% or more.
- the porosity of the heat-resistant layer 0 is, for example, 55% to 75%, preferably 55% to 68%, and may be 65% to 68%. If the porosity of the heat-resistant layer 70 is too large, the effect of suppressing the thermal shrinkage of the resin layer 60 may be reduced, and defects such as cracks and peeling may easily occur. On the other hand, if the porosity of the heat-resistant layer 70 is too small, the ionic conductivity of the separator 13 is lowered, and the high rate discharge characteristics may be lowered.
- the porosity of the heat-resistant layer 70 can be calculated as follows. An apparent volume occupied by the heat-resistant layer 70 having a surface area of a unit area is defined as V1 [cm 3 ]. The ratio W / ⁇ between the mass W [g] of the heat-resistant layer 70 and the true density ⁇ [g / cm 3 ] of the material constituting the heat-resistant layer 70 is V0. At this time, the porosity of the heat-resistant layer 70 can be calculated by (V1 ⁇ V0) / V1 ⁇ 100. The thickness of the heat-resistant layer 70 is necessary when calculating the apparent volume V1, and the thickness can be obtained by image analysis of an image taken with a scanning electron microscope (SEM). The mass W of the heat-resistant layer 70 can be measured as follows.
- the separator 13 is cut out to a predetermined area to obtain a sample, and its mass is measured.
- the mass of the heat-resistant layer 70 having the predetermined area is calculated by subtracting the mass of the resin layer 60 having the predetermined area from the mass of the sample.
- the mass W [g] of the heat-resistant layer 70 can be calculated by converting the mass of the heat-resistant layer 70 thus calculated per unit area.
- the average pore diameter of the heat-resistant layer 70 is not particularly limited, but may be, for example, in the range of 0.01 ⁇ m to 10 ⁇ m, or in the range of 0.1 ⁇ m to 4 ⁇ m.
- the average pore diameter can be measured using a commercially available mercury porosimeter or the like.
- the 90-degree peel strength of the heat-resistant layer 70 with respect to the resin layer 60 is, for example, 2.9 N / m to 15.1 N / m, and preferably 6 N / m to 15.1 N / m.
- the “90-degree peel strength” referred to in this specification is a peel strength measured in accordance with JIS-C6481-1995.
- the peel strength is low, the heat-resistant layer 70 is easy to peel off, and when an internal short circuit occurs, the thermal contraction of the resin layer 60 cannot be effectively suppressed, and the internal short circuit tends to spread.
- the peel strength is high, the flexibility of the separator 13 is lowered, and the assemblability of the separator tends to deteriorate.
- the lithium ion secondary battery 10 is manufactured as follows. First, the positive electrode 12, the negative electrode 14, and the separator 13 are each produced. Next, the electrode body 11 is assembled by overlapping them and winding them into a cylindrical shape. Next, the electrode body 11 is inserted into the case main body 152, and the nonaqueous electrolytic solution 20 is injected into the case main body 152. As a result, the electrode body 11 is impregnated with the nonaqueous electrolytic solution 20. Thereafter, the case body 152 is covered with the lid body 154, and the lid body 154 and the case body 152 are sealed.
- the peel strength is 2.9 N / m to 15.1 N / m.
- the peel strength is 7.5 N / m to 15.1 N / m, which is relatively large.
- the initial IV resistance was measured for the samples of each Example and each Comparative Example.
- the IV resistance was measured as follows. That is, each sample was precharged with a constant current and constant voltage (CCCV) at 5 A up to 3.5 V. The total charging time was 1 hour. Thereby, the SOC (State of Charge) of each sample was adjusted to 60%. Thereafter, a constant current (CC) discharge was performed at 60 A for 10 seconds, and the internal resistance (IV resistance) was determined from the slope of the linear approximation line of the current (I) -voltage (V) plot value at this time.
- CCCV constant current and constant voltage
- the battery was charged with a charging current of 5 C at 25 ° C., and high-rate discharging (discharging current 20 C) was performed in an environment of ⁇ 15 ° C.
- the IV resistance after discharge was measured, and the ratio of the IV resistance after discharge to the initial IV resistance was measured. This ratio indicates how much the IV resistance has changed due to the high-rate discharge in a low temperature environment. It can be considered that the larger the ratio, the greater the performance deteriorated by the high rate discharge in a low temperature environment.
- Table 1 The results are as shown in Table 1.
- Comparative Example 3 where the porosity is 40%, the ratio is 1.87, which indicates that the degree of deterioration is large. According to Examples 1 to 9, the ratio is 1.12 to 1.18, which is smaller than the ratio of Comparative Example 3. It can be seen that Examples 1 to 9 are superior to Comparative Example 3 in high rate discharge characteristics at low temperatures.
- FIG. 5 shows that when the peel strength is 6 N / m or more, the capacity retention rate is kept high. From Table 1, it can be seen that according to Examples 3 to 9 having a peel strength of 6 N / m or more, the capacity retention rate is 80% or more. From Table 1, it can be seen that according to Examples 3 to 9 in which the binder amount is 5 wt% to 7 wt%, the peel strength is 6 N / m or more.
Abstract
Description
平均粒径が5μmのリチウムニッケルマンガンコバルト酸化物(Ni:Mn:Co=1:1:1)85重量部と、アセチレンブラック10重量部と、PVDF5重量部とにNMPを加え、固形分率が60~70質量%となるように混練し、正極合材層形成用のペーストを作製した。厚さ15μmのアルミニウム箔の両面に上記ペーストを塗布して乾燥させ、アルミニウム箔の両面に正極合材層を形成した。正極合材層が形成された上記アルミニウム箔を圧延することにより、シート状の正極を作製した。
耐熱層形成用のスラリーの作製に際して、フィラーとしてのアルミナ粉末を96重量部、アクリル系バインダを4重量部としたこと以外は実施例1と同様にして、実施例2のリチウムイオン二次電池を作製した。耐熱層の空孔率は65%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとしてのアルミナ粉末を95重量部、アクリル系バインダを5重量部としたこと以外は実施例1と同様にして、実施例3のリチウムイオン二次電池を作製した。耐熱層の空孔率は60%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.5μmのアルミナ粉末(住友化学株式会社製の「AA05」)を用い、そのアルミナ粉末を95重量部、アクリル系バインダを5重量部としたこと以外は実施例1と同様にして、実施例4のリチウムイオン二次電池を作製した。耐熱層の空孔率は65%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.3μmのアルミナ粉末(住友化学株式会社製の「AA03」)を用い、そのアルミナ粉末を94重量部、アクリル系バインダを6重量部としたこと以外は実施例1と同様にして、実施例5のリチウムイオン二次電池を作製した。耐熱層の空孔率は67%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.3μmのアルミナ粉末(住友化学株式会社製の「AA03」)を用い、そのアルミナ粉末を93重量部、アクリル系バインダを7重量部としたこと以外は実施例1と同様にして、実施例6のリチウムイオン二次電池を作製した。耐熱層の空孔率は68%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.6μmのベーマイト粉末を用い、そのベーマイト粉末を95重量部、アクリル系バインダを5重量部としたこと以外は実施例1と同様にして、実施例7のリチウムイオン二次電池を作製した。耐熱層の空孔率は65%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.7μmの水酸化マグネシウム粉末を用い、その水酸化マグネシウム粉末を95重量部、アクリル系バインダを5重量部としたこと以外は実施例1と同様にして、実施例8のリチウムイオン二次電池を作製した。耐熱層の空孔率は55%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.7μmの炭酸マグネシウム粉末を用い、その炭酸マグネシウム粉末を95重量部、アクリル系バインダを5重量部としたこと以外は実施例1と同様にして、実施例9のリチウムイオン二次電池を作製した。耐熱層の空孔率は55%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.65μmのアルミナ粉末(住友化学株式会社製の「AKP3000」)を用い、そのアルミナ粉末を98重量部、アクリル系バインダを2重量部としたこと以外は実施例1と同様にして、比較例1のリチウムイオン二次電池を作製した。耐熱層の空孔率は70%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が0.3μmのアルミナ粉末(住友化学株式会社製の「AA03」)を用い、そのアルミナ粉末を90重量部、アクリル系バインダを10重量部としたこと以外は実施例1と同様にして、比較例2のリチウムイオン二次電池を作製した。耐熱層の空孔率は65%であった。
耐熱層形成用のスラリーの作製に際して、フィラーとして平均粒径D50が2μmのアルミナ粉末(住友化学株式会社製の「AA03」)を用い、そのアルミナ粉末を96重量部、アクリル系バインダを4重量部としたこと以外は実施例1と同様にして、比較例3のリチウムイオン二次電池を作製した。耐熱層の空孔率は40%であった。
各実施例および各比較例のセパレータに対し、JIS-C6481-1995に準拠した方法により、耐熱層の90度剥離強度を測定した。測定には、15mm×120mmのサンプルを用いた。このサンプルの耐熱層が形成されている側の面を両面テープを用いて台上に固定し、樹脂層を耐熱層に対して垂直となる方向に引っ張った。樹脂層を毎分約20mmの速さで連続的に約65mm剥がし、この間の引っ張り荷重の平均値を剥離強度とした。測定結果は表1に示す通りである。
JIS C8714に準じて、L字型ニッケル異物を用いた内部短絡試験を実施した。各実施例および各比較例につき、10個のサンプルに対して上記試験を実施し、短絡による発熱が生じたサンプルの数を調べた。その結果は前述の表1に示す通りである。比較例1では4個のサンプルにおいて短絡による発熱が生じた。比較例1では剥離強度が1.8N/mであって小さいため、異物による内部短絡が生じたときに耐熱層が樹脂層から剥離し、樹脂層の熱収縮を十分に抑制することができなかったためと推定される。実施例1~9では、全てのサンプルにおいて短絡による発熱が生じないことが確認された。
各実施例および各比較例の50個のサンプルに対してX線撮影を行い、電極体に巻きずれが生じているか否かを観察した。例えば、セパレータが正極または負極を覆うことができていないもの、負極が正極を覆うことができていないものは、巻きずれが生じていると見なした。その結果は表1に示す通りである。比較例2について、8個のサンプルに巻きずれが生じていることが確認された。比較例2では剥離強度が17.5N/mであって大きいため、耐熱層と樹脂層との密着性が高い。そのため、セパレータの柔軟性が低下してしまい、良好に巻回することが難しくなったためと推定される。実施例1~9については、全てのサンプルにおいて巻きずれが生じていないことが確認された。
各実施例および各比較例のサンプルについて、初期のIV抵抗を測定した。IV抵抗は以下のようにして測定した。すなわち、各サンプルを5Aで3.5Vまで定電流定電圧(CCCV)で予備充電した。合計充電時間は1時間とした。これにより、各サンプルのSOC(State of Charge)60%に調整した。その後、60Aで10秒間の定電流(CC)放電を行い、このときの電流(I)-電圧(V)プロット値の一次近似直線の傾きから内部抵抗(IV抵抗)を求めた。
各実施例および各比較例のサンプルについて、充電と放電とを1つのサイクルとして、60℃の環境下で1000サイクルの充放電を行った。充放電は、60℃、2Cの定電流で行った。1000サイクルの充放電後の電池容量を測定し、その電池容量の初期の電池容量に対する比率を容量維持率として算出した。この比率が大きいほど、性能劣化が少ない電池であると見なすことができる。その結果は表1および図5に示す通りである。
Claims (9)
- 正極と、負極と、前記正極と前記負極との間に介在するセパレータと、少なくても前記セパレータに含浸される非水電解質と、を備えた非水電解質二次電池であって、
前記セパレータは、多孔質の樹脂層と、前記樹脂層の少なくとも一方の面に積層された多孔質の耐熱層と、を有し、
前記耐熱層は、無機材料からなるフィラーと、バインダとを含み、
前記耐熱層の空孔率は55%以上であり、
前記樹脂層に対する前記耐熱層の90度剥離強度は2.9N/m~15.1N/mである非水電解質二次電池。 - 前記耐熱層の空孔率は55%~68%である、請求項1に記載の非水電解質二次電池。
- 前記樹脂層に対する前記耐熱層の90度剥離強度は6N/m~15.1N/mである、請求項1または2に記載の非水電解質二次電池。
- 前記フィラーの平均粒径は0.3μm~0.7μmである、請求項1~3のいずれか一項に記載の非水電解質二次電池。
- 前記フィラーの平均粒径は0.3μm~0.5μmである、請求項4に記載の非水電解質二次電池。
- 前記フィラーと前記バインダとの重量割合は93:7~95:5である、請求項1~5のいずれか一項に記載の非水電解質二次電池。
- 前記フィラーは、アルミナ、ベーマイト、水酸化マグネシウム、および炭酸マグネシウムからなる群から選択される少なくとも一種の材料からなっている、請求項1~6のいずれか一項に記載の非水電解質二次電池。
- 前記正極と前記セパレータと前記負極とは、互いに重ね合わされ且つ巻回されている、請求項1~7のいずれか一項に記載の非水電解質二次電池。
- 駆動用電源として請求項1~8のいずれか一項に記載の非水電解質二次電池を備えた車両。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/004,440 US9209502B2 (en) | 2011-03-16 | 2011-03-16 | Non-aqueous electrolyte secondary battery and vehicle |
CN201180069247.3A CN103430349B (zh) | 2011-03-16 | 2011-03-16 | 非水电解质二次电池和车辆 |
KR1020137026862A KR101522485B1 (ko) | 2011-03-16 | 2011-03-16 | 비수 전해질 2차 전지 및 차량 |
JP2013504471A JP5652683B2 (ja) | 2011-03-16 | 2011-03-16 | 非水電解質二次電池および車両 |
PCT/JP2011/056307 WO2012124093A1 (ja) | 2011-03-16 | 2011-03-16 | 非水電解質二次電池および車両 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2011/056307 WO2012124093A1 (ja) | 2011-03-16 | 2011-03-16 | 非水電解質二次電池および車両 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012124093A1 true WO2012124093A1 (ja) | 2012-09-20 |
Family
ID=46830221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/056307 WO2012124093A1 (ja) | 2011-03-16 | 2011-03-16 | 非水電解質二次電池および車両 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9209502B2 (ja) |
JP (1) | JP5652683B2 (ja) |
KR (1) | KR101522485B1 (ja) |
CN (1) | CN103430349B (ja) |
WO (1) | WO2012124093A1 (ja) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013069383A1 (ja) * | 2011-11-10 | 2013-05-16 | 日産自動車株式会社 | 耐熱絶縁層付セパレータ |
WO2014083988A1 (ja) * | 2012-11-30 | 2014-06-05 | 帝人株式会社 | 非水系二次電池用セパレータ及び非水系二次電池 |
US9595745B2 (en) | 2011-07-25 | 2017-03-14 | Toyota Jidosha Kabushiki Kaisha | Nonaqueous electrolyte secondary battery |
WO2018061808A1 (ja) * | 2016-09-27 | 2018-04-05 | 株式会社Gsユアサ | 蓄電素子及びその製造方法 |
CN110429229A (zh) * | 2019-07-31 | 2019-11-08 | 宁德新能源科技有限公司 | 多层隔离膜及使用其的装置 |
US10964927B2 (en) | 2018-06-20 | 2021-03-30 | Ningde Amperex Technology Limited | Separator and electrochemical device |
EP4047677A1 (en) | 2021-02-22 | 2022-08-24 | Prime Planet Energy & Solutions, Inc. | Secondary battery and method for producing secondary battery |
KR20220120484A (ko) | 2021-02-22 | 2022-08-30 | 프라임 플래닛 에너지 앤드 솔루션즈 가부시키가이샤 | 이차 전지 및 이차 전지의 제조 방법 |
EP4057406A1 (en) | 2021-03-09 | 2022-09-14 | Prime Planet Energy & Solutions, Inc. | Secondary battery |
US11456489B2 (en) | 2018-01-09 | 2022-09-27 | Toyota Jidosha Kabushiki Kaisha | Nonaqueous electrolyte secondary battery, and method for producing a nonaqueous electrolyte secondary battery |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6063247B2 (ja) * | 2012-12-25 | 2017-01-18 | オートモーティブエナジーサプライ株式会社 | 車両用非水電解液電池およびその使用方法 |
WO2014145849A1 (en) * | 2013-03-15 | 2014-09-18 | Amtek Research International Llc | Freestanding, dimensionally stable microporous webs |
JP2016100135A (ja) * | 2014-11-19 | 2016-05-30 | トヨタ自動車株式会社 | 非水電解質二次電池 |
EP3379602B1 (en) * | 2015-11-19 | 2020-01-08 | Asahi Kasei Kabushiki Kaisha | Separator for electricity storage devices, electrode body using same, and electricity storage device |
JP6666223B2 (ja) | 2016-09-21 | 2020-03-13 | 株式会社東芝 | 負極、非水電解質電池、電池パック、及び車両 |
CN108448033A (zh) * | 2017-02-16 | 2018-08-24 | 帝人株式会社 | 非水系二次电池用隔膜和非水系二次电池 |
US11024923B2 (en) * | 2017-03-09 | 2021-06-01 | Sion Power Corporation | Electrochemical cells comprising short-circuit resistant electronically insulating regions |
JP7100798B2 (ja) * | 2018-01-09 | 2022-07-14 | トヨタ自動車株式会社 | 非水電解液二次電池 |
EP3930042A4 (en) * | 2019-03-29 | 2023-07-19 | GS Yuasa International Ltd. | POWER STORAGE ELEMENT |
WO2024054017A1 (ko) * | 2022-09-06 | 2024-03-14 | 주식회사 엘지에너지솔루션 | 전극 조립체 및 리튬 이차 전지 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008149986A1 (ja) * | 2007-06-06 | 2008-12-11 | Asahi Kasei E-Materials Corporation | 多層多孔膜 |
JP2009197096A (ja) * | 2008-02-20 | 2009-09-03 | Sumitomo Chemical Co Ltd | 多孔性フィルムならびにそれを含む積層多孔性フィルムおよびセパレータ |
JP2010240936A (ja) * | 2009-04-03 | 2010-10-28 | Asahi Kasei E-Materials Corp | 多層多孔膜 |
JP2011023186A (ja) * | 2009-07-15 | 2011-02-03 | Hitachi Maxell Ltd | 電気化学素子用セパレータ、電気化学素子およびその製造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW297171B (ja) * | 1994-12-20 | 1997-02-01 | Hoechst Celanese Corp | |
US20080182174A1 (en) * | 2006-02-15 | 2008-07-31 | Carlson Steven A | Microporous separators for electrochemical cells |
EP2575196B1 (en) | 2006-11-20 | 2014-05-28 | Teijin Limited | Separator for non-aqueous secondary battery and non-aqueous secondary battery. |
JP2008251527A (ja) | 2007-03-02 | 2008-10-16 | Matsushita Electric Ind Co Ltd | 非水電解質二次電池 |
JP2010056036A (ja) * | 2008-08-29 | 2010-03-11 | Teijin Ltd | 非水電解質電池セパレータ及びその製造方法並びにそれを用いた非水電解質二次電池 |
JP5545508B2 (ja) | 2010-10-13 | 2014-07-09 | トヨタ自動車株式会社 | 非水電解液リチウム二次電池 |
-
2011
- 2011-03-16 CN CN201180069247.3A patent/CN103430349B/zh active Active
- 2011-03-16 US US14/004,440 patent/US9209502B2/en active Active
- 2011-03-16 JP JP2013504471A patent/JP5652683B2/ja active Active
- 2011-03-16 KR KR1020137026862A patent/KR101522485B1/ko active IP Right Grant
- 2011-03-16 WO PCT/JP2011/056307 patent/WO2012124093A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008149986A1 (ja) * | 2007-06-06 | 2008-12-11 | Asahi Kasei E-Materials Corporation | 多層多孔膜 |
JP2009197096A (ja) * | 2008-02-20 | 2009-09-03 | Sumitomo Chemical Co Ltd | 多孔性フィルムならびにそれを含む積層多孔性フィルムおよびセパレータ |
JP2010240936A (ja) * | 2009-04-03 | 2010-10-28 | Asahi Kasei E-Materials Corp | 多層多孔膜 |
JP2011023186A (ja) * | 2009-07-15 | 2011-02-03 | Hitachi Maxell Ltd | 電気化学素子用セパレータ、電気化学素子およびその製造方法 |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9595745B2 (en) | 2011-07-25 | 2017-03-14 | Toyota Jidosha Kabushiki Kaisha | Nonaqueous electrolyte secondary battery |
WO2013069383A1 (ja) * | 2011-11-10 | 2013-05-16 | 日産自動車株式会社 | 耐熱絶縁層付セパレータ |
US10347892B2 (en) | 2012-11-30 | 2019-07-09 | Teijin Limited | Separator for non-aqueous secondary battery and non-aqueous secondary battery |
US20150263325A1 (en) * | 2012-11-30 | 2015-09-17 | Teijin Limited | Separator for non-aqueous secondary battery and non-aqueous secondary battery |
JPWO2014083988A1 (ja) * | 2012-11-30 | 2017-01-05 | 帝人株式会社 | 非水系二次電池用セパレータ及び非水系二次電池 |
JP5657177B2 (ja) * | 2012-11-30 | 2015-01-21 | 帝人株式会社 | 非水系二次電池用セパレータ及び非水系二次電池 |
US10074840B2 (en) | 2012-11-30 | 2018-09-11 | Teijin Limited | Separator for non-aqueous secondary battery and non-aqueous secondary battery |
WO2014083988A1 (ja) * | 2012-11-30 | 2014-06-05 | 帝人株式会社 | 非水系二次電池用セパレータ及び非水系二次電池 |
KR20150091471A (ko) * | 2012-11-30 | 2015-08-11 | 데이진 가부시키가이샤 | 비수계 이차전지용 세퍼레이터 및 비수계 이차전지 |
KR102137129B1 (ko) * | 2012-11-30 | 2020-07-24 | 데이진 가부시키가이샤 | 비수계 이차전지용 세퍼레이터 및 비수계 이차전지 |
WO2018061808A1 (ja) * | 2016-09-27 | 2018-04-05 | 株式会社Gsユアサ | 蓄電素子及びその製造方法 |
JPWO2018061808A1 (ja) * | 2016-09-27 | 2019-07-04 | 株式会社Gsユアサ | 蓄電素子及びその製造方法 |
US11075432B2 (en) | 2016-09-27 | 2021-07-27 | Gs Yuasa International Ltd. | Energy storage device and method for manufacturing same |
US11456489B2 (en) | 2018-01-09 | 2022-09-27 | Toyota Jidosha Kabushiki Kaisha | Nonaqueous electrolyte secondary battery, and method for producing a nonaqueous electrolyte secondary battery |
US10964927B2 (en) | 2018-06-20 | 2021-03-30 | Ningde Amperex Technology Limited | Separator and electrochemical device |
CN110429229A (zh) * | 2019-07-31 | 2019-11-08 | 宁德新能源科技有限公司 | 多层隔离膜及使用其的装置 |
US11387522B2 (en) | 2019-07-31 | 2022-07-12 | Ningde Amperex Technology Limited | Multilayer separator and device using the same |
EP4047677A1 (en) | 2021-02-22 | 2022-08-24 | Prime Planet Energy & Solutions, Inc. | Secondary battery and method for producing secondary battery |
KR20220120484A (ko) | 2021-02-22 | 2022-08-30 | 프라임 플래닛 에너지 앤드 솔루션즈 가부시키가이샤 | 이차 전지 및 이차 전지의 제조 방법 |
KR20220120483A (ko) | 2021-02-22 | 2022-08-30 | 프라임 플래닛 에너지 앤드 솔루션즈 가부시키가이샤 | 이차 전지 및 이차 전지의 제조 방법 |
EP4050692A1 (en) | 2021-02-22 | 2022-08-31 | Prime Planet Energy & Solutions, Inc. | Secondary battery and method for producing secondary battery |
EP4057406A1 (en) | 2021-03-09 | 2022-09-14 | Prime Planet Energy & Solutions, Inc. | Secondary battery |
Also Published As
Publication number | Publication date |
---|---|
JP5652683B2 (ja) | 2015-01-14 |
CN103430349A (zh) | 2013-12-04 |
KR20130131475A (ko) | 2013-12-03 |
US9209502B2 (en) | 2015-12-08 |
JPWO2012124093A1 (ja) | 2014-07-17 |
CN103430349B (zh) | 2015-11-25 |
US20140004400A1 (en) | 2014-01-02 |
KR101522485B1 (ko) | 2015-05-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5652683B2 (ja) | 非水電解質二次電池および車両 | |
KR101888740B1 (ko) | 비수전해질 이차 전지용 세퍼레이터 및 그 제조 방법 | |
JP4766348B2 (ja) | リチウム二次電池およびその製造方法 | |
KR101513821B1 (ko) | 전지용 전극 및 그 이용 | |
JP5828346B2 (ja) | リチウム二次電池 | |
JP5316905B2 (ja) | リチウム二次電池 | |
WO2010131401A1 (ja) | リチウムイオン二次電池用電極及びリチウムイオン二次電池 | |
WO2010073924A1 (ja) | 非水二次電池用電極の製造方法 | |
US9478784B2 (en) | Nonaqueous electrolyte secondary battery | |
JP5843116B2 (ja) | 非水電解質二次電池 | |
JP5365842B2 (ja) | リチウムイオン電池 | |
JP5590381B2 (ja) | リチウムイオン二次電池 | |
WO2012023197A1 (ja) | リチウムイオン二次電池および該電池用セパレータ | |
US20180315970A1 (en) | Nonaqueous electrolyte secondary battery | |
JP2011071009A (ja) | リチウムイオン二次電池用セパレータおよびその製造方法 | |
JP2010102868A (ja) | リチウム二次電池 | |
JP2012182084A (ja) | 非水電解質二次電池 | |
JP5720952B2 (ja) | リチウムイオン二次電池 | |
KR101556486B1 (ko) | 비수 전해질 2차 전지 | |
JP6249242B2 (ja) | 非水電解質二次電池 | |
JP2022175835A (ja) | 二次電池の集電体および二次電池 | |
JP2021077531A (ja) | 非水電解質二次電池 | |
CN111029580B (zh) | 二次电池用电极和二次电池 | |
JP6331099B2 (ja) | 非水電解質二次電池 | |
JP2016225223A (ja) | 非水電解液二次電池 |
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: 11861060 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2013504471 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14004440 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20137026862 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11861060 Country of ref document: EP Kind code of ref document: A1 |