WO2013129009A1 - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
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- WO2013129009A1 WO2013129009A1 PCT/JP2013/051886 JP2013051886W WO2013129009A1 WO 2013129009 A1 WO2013129009 A1 WO 2013129009A1 JP 2013051886 W JP2013051886 W JP 2013051886W WO 2013129009 A1 WO2013129009 A1 WO 2013129009A1
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- H01M10/052—Li-accumulators
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- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- 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
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- 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
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- 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
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- 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
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- H—ELECTRICITY
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- 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
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- H—ELECTRICITY
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- 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
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- H—ELECTRICITY
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- 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
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- 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
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- H—ELECTRICITY
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- 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
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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- 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
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- 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
- the present invention relates to a non-aqueous electrolyte secondary battery.
- a secondary battery that can be repeatedly charged and discharged is suitable as a power source for driving these motors, and a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery that can be expected to have a high capacity and a high output is attracting attention.
- the non-aqueous electrolyte secondary battery has, as its constituent elements, a power generation element in which a single battery layer including a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode is laminated.
- a separator made of a microporous resin sheet in which a nonaqueous electrolyte such as a liquid electrolyte or a gel electrolyte is incorporated.
- nonaqueous electrolytes contain an organic solvent and a lithium salt as essential components in a lithium ion secondary battery.
- the separator constituting the electrolyte layer in the single cell layer has a function of holding a non-aqueous electrolyte and ensuring ionic conductivity between the positive electrode and the negative electrode; a function as a partition wall between the positive electrode and the negative electrode; Is required.
- a thermoplastic resin such as polyolefin is used.
- a constructed microporous membrane was used.
- Patent Document 1 For such a problem, for example, in Patent Document 1, by forming a breathable surface protective layer (heat resistant insulating layer) containing inorganic fine particles on at least one surface of a film having a porous structure made of polyolefin or the like, It has been proposed to prevent internal short circuits.
- a breathable surface protective layer heat resistant insulating layer
- An object of the present invention is to provide means capable of effectively suppressing the occurrence of misalignment in a stacking process when manufacturing a nonaqueous electrolyte secondary battery.
- the present inventor has intensively studied to solve the stacking deviation in the above stacking process. As a result, the above problem can be solved by controlling the value of the ratio of the surface roughness of each surface of these two elements constituting the interface between the directly adjacent negative electrode active material layer and the separator within a predetermined range. I found out.
- the nonaqueous electrolyte secondary battery according to one embodiment of the present invention thus completed includes a positive electrode in which a positive electrode active material layer is formed on the surface of a positive electrode current collector, and a negative electrode active material on the surface of the negative electrode current collector.
- a single battery layer comprising: a negative electrode in which a material layer is formed; and a separator containing a nonaqueous electrolyte interposed between the positive electrode active material layer and the negative electrode active material layer so as to be in contact with the negative electrode active material layer It has a power generation element.
- the nonaqueous electrolyte secondary battery has a surface roughness of the surface of the separator on the side in contact with the negative electrode active material layer with respect to the surface roughness of the surface of the negative electrode active material layer on the side of contact with the separator (R zjis (1)).
- R zjis (2) ratio value (hereinafter, this ratio value is also referred to as “surface roughness ratio”)
- the dynamic friction coefficient between the negative electrode active material layer and the separator is controlled to a relatively large value.
- FIG. 1 is a schematic cross-sectional view showing a lithium ion secondary battery according to an embodiment of the present invention. It is sectional drawing which represented typically the separator with a heat resistant insulating layer which concerns on one Embodiment of this invention.
- Non-aqueous electrolyte secondary batteries have various forms and structures such as stacked (flat) batteries and wound (cylindrical) batteries, for example, when distinguished by form and structure. In the present invention, any of these forms can be applied. However, according to the present invention, a particularly remarkable effect is manifested in a non-aqueous electrolyte secondary battery having a flat plate (flat) battery structure. sell. Therefore, in the following, a non-aqueous electrolyte secondary battery having a flat plate (flat) battery structure will be described by taking a lithium ion secondary battery as an example.
- FIG. 1 is a schematic cross-sectional view showing a lithium ion secondary battery according to an embodiment of the present invention.
- the lithium ion secondary battery 10 of the present embodiment has a structure in which a substantially rectangular power generation element 21 in which a charge / discharge reaction actually proceeds is sealed inside a laminate sheet 29 that is an exterior.
- the power generation element 21 is housed and sealed by using a polymer-metal composite laminate sheet as a battery exterior and joining the entire periphery thereof by thermal fusion.
- the power generating element 21 includes a negative electrode in which the negative electrode active material layer 13 is disposed on both surfaces of the negative electrode current collector 11, a separator 17, and a positive electrode in which the positive electrode active material layer 15 is disposed on both surfaces of the positive electrode current collector 12. It has the structure. Specifically, the negative electrode, the separator, and the positive electrode are laminated in this order so that one negative electrode active material layer 13 and the positive electrode active material layer 15 adjacent to the negative electrode active material layer 13 face each other with the separator 17 therebetween.
- the separator 17 contains a nonaqueous electrolyte (for example, a liquid electrolyte).
- the adjacent negative electrode, separator, and positive electrode constitute one single cell layer 19. Therefore, it can be said that the lithium ion battery 10 of the present embodiment has a configuration in which a plurality of single battery layers 19 are stacked and electrically connected in parallel.
- the negative electrode active material layer 13 is disposed on only one side of the outermost negative electrode current collector located on both outermost layers of the power generation element 21.
- the arrangement of the negative electrode and the positive electrode is reversed from that in FIG. 1 so that the outermost positive electrode current collector is positioned in both outermost layers of the power generation element 21, and the positive electrode is provided only on one side of the outermost positive electrode current collector.
- An active material layer may be arranged.
- the negative electrode active material layers are arranged on both surfaces of the outermost layer (negative electrode) current collector, and are positioned on the outermost layer of the power generation element. It is good also as a structure which does not make the negative electrode active material layer to function.
- the negative electrode current collector 11 and the positive electrode current collector 12 are attached with a negative electrode current collector plate 25 and a positive electrode current collector plate 27 that are electrically connected to the respective electrodes (positive electrode and negative electrode). These current collector plates (25, 27) are led out of the laminate sheet 29 so as to be sandwiched between the end portions of the laminate sheet 29, respectively.
- the negative electrode current collector plate 25 and the positive electrode current collector plate 27 are ultrasonically welded to the negative electrode current collector 11 and the positive electrode current collector 12 of each electrode via a negative electrode lead and a positive electrode lead (not shown), respectively, as necessary. Or resistance welding or the like.
- the lithium ion secondary battery 10 includes a separator 17 on the side in contact with the negative electrode active material layer 13 with respect to the surface roughness (R zjis (1)) of the surface of the negative electrode active material layer 13 on the side in contact with the separator 17.
- the surface roughness (R zjis ) is a parameter that is also referred to as “ten-point average roughness”, and is measured by a method described in Examples described later.
- the value of R A may be within the above-mentioned range, but is preferably 0.6 or less, more preferably 0.5 or less, still more preferably 0.4 or less, and particularly preferably 0. .3 or less, and most preferably 0.25 or less.
- the lower limit value of RA is not particularly limited, but is usually about 0.2 or more from the viewpoint of feasibility.
- the surface roughness ratio between the positive electrode active material layer and the separator is also controlled.
- the positive electrode active material layer 15 is in contact with the surface roughness (R zjis (3)) of the surface of the positive electrode active material layer 15 on the side in contact with the separator 17.
- the coefficient of dynamic friction between the negative electrode active material layer and the separator, and positive electrode active material layer is close to each other, and a configuration in which the slipperiness between the positive and negative electrodes is similar is achieved.
- the absolute value of slipperiness (dynamic friction coefficient) between the active material layer and the separator is also an important consideration factor. With respect to such parameters, it can be said that a balance between positive and negative electrodes is more preferable from the viewpoint of productivity.
- R B is not limited as long as within the range described above, but is preferably 0.5 or more, more preferably 0.5 to 1.25, and more preferably from 0.5 to zero. 8, particularly preferably 0.5 to 0.6. In another preferred embodiment, R B is greater than R A. By adopting these configurations, the effects of the present invention can be exhibited more remarkably.
- the specific method for controlling the values of the surface roughness ratios (R A , R B ) within the above-mentioned preferred ranges, and the technical common sense at the time of filing of the present application can be referred to as appropriate.
- a method for controlling the surface roughness of the active material layer surface for example, a method of adjusting the particle diameter of the active material contained in the active material layer is exemplified. In this case, when the particle diameter of the active material is increased, the surface roughness of the active material layer surface can be increased.
- the flatness of the surface of the active material layer may be adjusted by appropriately adjusting the conditions of the press treatment that may be performed when forming the active material layer. There is also a way to control.
- the BET specific surface area and particle diameter of inorganic particles contained in the heat-resistant insulating layer are used.
- the method of adjusting is illustrated. In this case, when the BET specific surface area or particle diameter of the inorganic particles contained in the heat-resistant insulating layer is increased, the surface roughness of the separator surface can be increased.
- the separator when a separator other than a separator with a heat-resistant insulating layer (for example, a resin film) is used as the separator, the surface roughness of the separator surface is reduced by a method of compressing with a rolling roll at a temperature lower than the melting point of the resin. It is possible to control.
- a separator other than a separator with a heat-resistant insulating layer for example, a resin film
- the negative electrode has a structure in which the negative electrode active material layer 13 is formed on the surface of the negative electrode current collector 11.
- the negative electrode current collector 11 is a member for electrically connecting the negative electrode active material layer 13 and the outside, and is made of a conductive material.
- the form mentioned later about the positive electrode electrical power collector 12 can be employ
- the negative electrode active material layer 15 includes a negative electrode active material, and may further include a conductive material, a binder, and the like for enhancing electrical conductivity as necessary.
- the negative electrode active material layer 13 may include an electrolyte.
- the negative electrode active material is not particularly limited as long as it is made of a material capable of inserting and extracting lithium.
- the negative electrode active material include metals such as Si and Sn, or metal oxides such as TiO, Ti 2 O 3 , TiO 2 , SiO 2 , SiO, and SnO 2 , Li 4/3 Ti 5/3 O 4.
- a composite oxide of lithium and transition metal such as Li 7 MnN, Li—Pb alloy, Li—Al alloy, Li, or natural graphite, artificial graphite, carbon black, activated carbon, carbon fiber, coke, soft carbon, Or carbon materials, such as hard carbon, etc. are mentioned preferably.
- a negative electrode active material contains the element alloyed with lithium.
- the negative electrode active material may be used alone or in the form of a mixture of two or more.
- the element alloying with lithium is not limited to the following, but specifically, Si, Ge, Sn, Pb, Al, In, Zn, H, Ca, Sr, Ba, Ru, Rh, Ir, Pd, Pt, Ag, Au, Cd, Hg, Ga, Tl, C, N, Sb, Bi, O, S, Se, Te, Cl, and the like.
- the average particle diameter of the negative electrode active material is not particularly limited, but is preferably 1 to 100 ⁇ m, more preferably 1 to 20 ⁇ m, from the viewpoint of increasing the capacity, reactivity, and cycle durability of the negative electrode active material. Within such a range, the secondary battery can suppress an increase in the internal resistance of the battery during charging and discharging under high output conditions, and can extract a sufficient current.
- the negative electrode active material is secondary particles, it can be said that the average particle diameter of the primary particles constituting the secondary particles is desirably in the range of 10 nm to 1 ⁇ m. It is not limited to. However, although depending on the manufacturing method, the negative electrode active material may not be a secondary particle formed by aggregation, agglomeration, or the like.
- the shape of the negative electrode active material varies depending on the type and manufacturing method, and examples thereof include a spherical shape (powdered shape), a plate shape, a needle shape, a column shape, and a square shape, but are not limited thereto. Any shape can be used without any problems. Preferably, an optimal shape that can improve battery characteristics such as charge / discharge characteristics is appropriately selected.
- the conductive material is blended for the purpose of improving the conductivity of the active material layer.
- the electrically conductive material that can be used in the present embodiment is not particularly limited, and conventionally known forms can be appropriately referred to. Examples thereof include carbon blacks such as acetylene black, furnace black, channel black, and thermal black; carbon fibers such as vapor grown carbon fiber (VGCF); and carbon materials such as graphite.
- VGCF vapor grown carbon fiber
- graphite graphite
- the binder is not limited to the following, but heat such as polyvinylidene fluoride (PVDF), carboxymethylcellulose (CMC), polytetrafluoroethylene (PTFE), polyvinyl acetate, and acrylic resin (for example, LSR).
- PVDF polyvinylidene fluoride
- CMC carboxymethylcellulose
- PTFE polytetrafluoroethylene
- acrylic resin for example, LSR
- thermosetting resins such as plastic resins, polyimides, epoxy resins, polyurethane resins, and urea resins
- rubber materials such as styrene-butadiene rubber (SBR).
- R zjis (1) is preferably 3.0 to 10.0 ⁇ m, more preferably 3.0 to 6.0 ⁇ m.
- the positive electrode has a structure in which a positive electrode active material layer 15 is formed on the surface of the positive electrode current collector 12.
- the positive electrode current collector 12 is a member for electrically connecting the positive electrode active material layer 15 and the outside, and is made of a conductive material.
- a conductive material There is no restriction
- a constituent material of the current collector for example, a metal or a conductive polymer can be employed. Specific examples include iron, chromium, nickel, manganese, titanium, molybdenum, vanadium, niobium, copper, silver, platinum, stainless steel, and carbon, which may form a simple substance, an alloy, or a composite.
- a structure having a structure in which a conductive filler is dispersed in a base material made of a nonconductive polymer can also be adopted as one form of the current collector.
- the thickness of the current collector is not particularly limited, but is usually about 1 to 100 ⁇ m.
- the size of the current collector is determined according to the intended use of the lithium ion secondary battery.
- the positive electrode active material layer 13 includes a positive electrode active material, and may further include a conductive material, a binder, and the like for increasing electrical conductivity as necessary.
- the positive electrode active material layer 15 may include an electrolyte.
- the positive electrode active material is not particularly limited as long as it is a material capable of occluding and releasing lithium, and a positive electrode active material usually used for a lithium ion secondary battery can be used.
- lithium-transition metal composite oxides are preferable.
- Li—Mn composite oxides such as LiMn 2 O 4
- Li—Ni composite oxides such as LiNiO 2 , LiNi 0.5 Mn 0.5 O 2, etc.
- Li—Ni—Mn based composite oxide may be used in combination.
- the average particle diameter of the positive electrode active material is not particularly limited, but is preferably 1 to 100 ⁇ m, more preferably 1 to 20 ⁇ m, from the viewpoint of increasing the capacity, reactivity, and cycle durability of the positive electrode active material. Within such a range, the secondary battery can suppress an increase in the internal resistance of the battery during charging and discharging under high output conditions, and can extract a sufficient current.
- the positive electrode active material is secondary particles, it can be said that the average particle diameter of the primary particles constituting the secondary particles is desirably in the range of 10 nm to 1 ⁇ m. It is not limited to. However, although it depends on the manufacturing method, the positive electrode active material may not be a secondary particle formed by aggregation, agglomeration, or the like.
- the shape of the positive electrode active material varies depending on the type and manufacturing method, and examples thereof include a spherical shape (powdered shape), a plate shape, a needle shape, a column shape, and a square shape, but are not limited thereto. Any shape can be used without any problems. Preferably, an optimal shape that can improve battery characteristics such as charge / discharge characteristics is appropriately selected.
- R zjis (3) is preferably 1.5 to 3.5 ⁇ m, more preferably 2.0 to 3.0 ⁇ m.
- the separator 17 functions as a spatial partition (spacer) between the negative electrode active material layer 13 and the positive electrode active material layer 15. In addition, it also has a function of incorporating a non-aqueous electrolyte that is a lithium ion transfer medium between the positive and negative electrodes during charging and discharging.
- the separator 17 incorporates a non-aqueous electrolyte as described above.
- a non-aqueous electrolyte as described above.
- a liquid electrolyte and a polymer gel electrolyte can be employ
- the liquid electrolyte is a lithium salt dissolved in an organic solvent.
- organic solvent examples include dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate (DPC), ethyl methyl carbonate (EMC), methyl propionate (MP), methyl acetate (MA), methyl formate (MF). ), 4-methyldioxolane (4MeDOL), dioxolane (DOL), 2-methyltetrahydrofuran (2MeTHF), tetrahydrofuran (THF), dimethoxyethane (DME), ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate (BC) ), And ⁇ -butyrolactone (GBL). These solvents may be used alone or as a mixture of two or more.
- lithium salt is not particularly limited, LiPF 6, LiBF 4, LiClO 4, LiAsF 6, LiTaF 6, LiSbF 6, LiAlCl 4, Li 2 B 10 Cl 10, LiI, LiBr, LiCl, LiAlCl, LiHF 2 , Inorganic acid anion salt such as LiSCN, LiCF 3 SO 3 , Li (CF 3 SO 2 ) 2 N, LiBOB (lithium bisoxide borate), LiBETI (lithium bis (perfluoroethylenesulfonylimide); Li (C 2 And organic acid anion salts such as F 5 SO 2 ) 2 N). These lithium salts may be used alone or in the form of a mixture of two or more.
- the gel electrolyte has a configuration in which the above liquid electrolyte is injected into a matrix polymer having lithium ion conductivity.
- the matrix polymer having lithium ion conductivity include a polymer having polyethylene oxide in the main chain or side chain (PEO), a polymer having polypropylene oxide in the main chain or side chain (PPO), polyethylene glycol (PEG), poly Acrylonitrile (PAN), polymethacrylic acid ester, polyvinylidene fluoride (PVdF), copolymer of polyvinylidene fluoride and hexafluoropropylene (PVdF-HFP), polyacrylonitrile (PAN), poly (methyl acrylate) (PMA), poly (Methyl methacrylate) (PMMA) etc.
- PEO polymer having polyethylene oxide in the main chain or side chain
- PPO polymer having polypropylene oxide in the main chain or side chain
- PEG polyethylene glycol
- PAN poly Acryl
- a polymerizable polymer for example, PEO or PPO
- a polymer electrolyte using an appropriate polymerization initiator.
- a polymerization treatment may be performed.
- the nonaqueous electrolyte mentioned above may be contained in the active material layer of the electrode.
- constituent material of the separator 17 include, for example, a microporous film made of polyolefin such as polyethylene or polypropylene, hydrocarbon such as polyvinylidene fluoride-hexafluoropropylene (PVdF-HFP), glass fiber, or the like. Can be mentioned.
- a microporous film made of polyolefin such as polyethylene or polypropylene
- hydrocarbon such as polyvinylidene fluoride-hexafluoropropylene (PVdF-HFP), glass fiber, or the like.
- PVdF-HFP polyvinylidene fluoride-hexafluoropropylene
- FIG. 2 sectional drawing which represented typically the separator with a heat resistant insulating layer which concerns on one Embodiment of this invention is shown.
- the separator 1 with a heat resistant insulating layer shown in FIG. 2 is formed by forming heat resistant insulating layers (5a, 5b) on both surfaces of a porous substrate layer 3.
- the porous substrate layer 3 has a configuration of a microporous film made of, for example, polyethylene.
- the heat-resistant insulating layers (5a, 5b) have a configuration in which alumina (Al 2 O 3 ) particles are connected through, for example, carboxymethyl cellulose (CMC) as a binder.
- alumina (Al 2 O 3 ) particles are connected through, for example, carboxymethyl cellulose (CMC) as a binder.
- CMC carboxymethyl cellulose
- the separator 1 with a heat resistant insulating layer Since the heat resistant insulating layers (5a, 5b) have a porous structure due to gaps formed by the alumina particles, the separator 1 with a heat resistant insulating layer has a porous structure as a whole. Therefore, the separator 1 with a heat-resistant insulating layer functions as a separator having lithium ion conductivity as a whole.
- each member of the separator with a heat resistant insulating layer in the form shown in FIG. 2 will be described.
- the porous substrate layer 3 functions as a substrate when the heat-resistant insulating layers (5a, 5b) are formed.
- the material constituting the porous substrate layer 3 is not particularly limited, but resin materials such as thermoplastic resins and thermosetting resins, metal materials, cellulosic materials, and the like can be used. Among these, it is preferable to use a porous substrate layer made of a resin material (hereinafter also referred to as “resin porous substrate layer”) from the viewpoint of providing a separator with a heat-resistant insulating layer with a shutdown function.
- Examples of the resin material constituting the resin porous substrate layer include polyethylene (PE), polypropylene (PP), a copolymer obtained by copolymerizing ethylene and propylene (ethylene-propylene copolymer), ethylene or Copolymers obtained by copolymerizing propylene with ethylene and other monomers other than propylene, polystyrene (PS), polyvinyl acetate (PVAc), polyethylene terephthalate (PET), polyvinylidene fluoride (PFDV), polytetrafluoro Ethylene (PTFE), Polysulfone (PSF), Polyethersulfone (PES), Polyetheretherketone (PEEK), Polyimide (PI), Polyamideimide (PAI), Phenol resin (PF), Epoxy resin (EP), Melamine resin (MF), urea tree (UF), alkyd resins, polyurethane (PUR) is. These resins may be used alone or in a mixture of two or more.
- the resin material constituting the resin porous substrate layer preferably contains a resin having a melting temperature of 120 to 200 ° C. so that the separator with a heat-resistant insulating layer exhibits a shutdown function in a temperature range of 120 to 200 ° C.
- a resin having a melting temperature of 120 to 200 ° C. so that the separator with a heat-resistant insulating layer exhibits a shutdown function in a temperature range of 120 to 200 ° C.
- PE polyethylene
- PP polypropylene
- a copolymer obtained by copolymerizing ethylene and propylene ethylene-propylene copolymer
- ethylene or another monomer other than ethylene and propylene and ethylene and propylene It is preferable to use a resin porous substrate layer containing a copolymer obtained by copolymerizing the above.
- the resin material constituting the resin porous substrate layer contains a resin having a melting temperature of 120 to 200 ° C.
- a resin having a melting temperature of 120 to 200 ° C. it may be used in combination with a thermoplastic resin or a thermosetting resin having a melting temperature exceeding 200 ° C.
- the ratio of the resin having a melting temperature of 120 to 200 ° C. in the entire resin porous substrate layer is preferably 50% by mass or more, more preferably 70% or more, and further preferably 90% or more. Particularly preferably, it is 95% or more, and most preferably 100%.
- a laminate in which two or more layers made of the above materials are laminated may be used as the resin porous substrate layer.
- a resin porous substrate layer having a three-layer structure of PP / PE / PP may be mentioned. Since the three-layered porous resin substrate layer has a PE melting temperature of 130 ° C., a shutdown function is exhibited when the battery temperature reaches 130 ° C. Even if the battery temperature rises further, the melting temperature of PP is 170 ° C., so that it is possible to prevent the entire surface from being short-circuited, and a separator with higher safety can be obtained.
- the shape of the resin porous substrate layer is not particularly limited, and a woven fabric, a nonwoven fabric, a microporous membrane, or the like can be used. Among these, a microporous film is preferable from the viewpoint of ensuring high lithium ion conductivity. Further, the porosity of the resin porous substrate layer is preferably 40 to 85%, more preferably 50 to 70%, and further preferably 55 to 60%. By setting the porosity to the above range, sufficient lithium ion conductivity and strength can be ensured.
- the thickness of the resin porous substrate layer is not particularly limited, but is preferably 1 to 200 ⁇ m, more preferably 5 to 100 ⁇ m, still more preferably 7 to 30 ⁇ m, and particularly preferably 10 to 20 ⁇ m. . If the thickness is 5 ⁇ m or more, the electrolyte retainability is good, and if it is 200 ⁇ m or less, the resistance is difficult to increase excessively.
- the heat resistant insulating layers (5a, 5b) are disposed on one or both sides of the porous substrate layer and have a function of reinforcing the strength of the separator.
- the porous substrate layer is a resin porous substrate layer made of a resin material, it also serves to relieve internal stress caused by an increase in battery temperature and suppress deformation due to thermal contraction of the separator.
- the heat resistant insulating layer includes inorganic particles and a binder.
- Inorganic particles contribute to the mechanical strength and heat shrinkage suppression effect of the heat-resistant insulating layer.
- the material used as the inorganic particles is not particularly limited. Examples thereof include silicon, aluminum, zirconium, titanium oxides (SiO 2 , Al 2 O 3 , ZrO 2 , TiO 2 ), hydroxides and nitrides, and composites thereof.
- These inorganic particles may be derived from mineral resources such as boehmite, zeolite, apatite, kaolin, mullite, spinel, olivine and mica, or may be artificially produced. Moreover, only 1 type may be used individually for these inorganic particles, and 2 or more types may be used together. Among these, from the viewpoint of cost, silica (SiO 2 ) or alumina (Al 2 O 3 ) is preferably used, and alumina (Al 2 O 3 ) is more preferably used.
- the binder has a role of adhering the inorganic particles and the inorganic particles to the resin porous substrate layer.
- the heat-resistant insulating layer is stably formed, and peeling between the porous substrate layer and the heat-resistant insulating layer is prevented.
- the binder used for the heat-resistant insulating layer of this embodiment is not particularly limited, and those skilled in the art can appropriately adopt conventionally known binders.
- PTFE polyvinyl fluoride
- PVDF polytetrafluoroethylene
- PTFE polyvinyl fluoride
- PVDF polytetrafluoroethylene
- PTFE polyvinyl fluoride
- methyl acrylate methyl acrylate
- PVDF polyvinylidene fluoride
- these compounds only 1 type may be used independently and 2 or more types may be used together.
- the binder content in the heat-resistant insulating layer is preferably 2 to 20% by mass with respect to 100% by mass of the heat-resistant insulating layer.
- the binder content is 2% by mass or more, the peel strength between the heat-resistant insulating layer and the porous substrate layer can be increased, and the vibration resistance of the separator can be improved.
- the binder content is 20% by mass or less, the gaps between the inorganic particles are appropriately maintained, so that sufficient lithium ion conductivity can be ensured.
- the thickness of one heat-resistant insulating layer is preferably 1 to 20 ⁇ m, more preferably 2 to 10 ⁇ m, and further preferably 3 to 7 ⁇ m.
- the thickness of the heat-resistant insulating layer is in such a range, it is preferable because sufficient strength can be imparted to the separator with the heat-resistant insulating layer, and the bulk and weight of the separator itself do not become too large.
- the compositions of the two heat-resistant insulating layers may be the same or different, but are preferably the same from the viewpoint of handling during production.
- the total thickness of the separator with a heat-resistant insulating layer of this embodiment is not particularly limited as long as sufficient strength can be secured. However, from the viewpoint of making the size of the battery more compact, it is preferable not to be too thick. Specifically, the thickness of the separator with a heat-resistant insulating layer is preferably 10 to 50 ⁇ m, and more preferably 15 to 30 ⁇ m.
- the manufacturing method of the separator with a heat-resistant insulating layer of the present embodiment is not particularly limited, and can be manufactured by appropriately referring to conventionally known techniques.
- the manufacturing method of the separator with a heat resistant insulating layer when the resin porous substrate layer is used as the porous substrate layer will be described.
- polyolefin When producing a microporous membrane of polyolefin as a resin porous substrate, first, polyolefin is dissolved in a solvent such as paraffin, liquid paraffin, paraffin oil, tetralin, ethylene glycol, glycerin, decalin and the like. Thereafter, it can be produced by extruding it into a sheet, removing the solvent, and performing uniaxial stretching and biaxial stretching (simultaneous and sequential).
- a solvent such as paraffin, liquid paraffin, paraffin oil, tetralin, ethylene glycol, glycerin, decalin and the like.
- a method for forming a heat-resistant insulating layer on the resin porous substrate will be described.
- a dispersion liquid in which inorganic particles and a binder are dispersed in a solvent is prepared.
- the dispersion is applied to one or both surfaces of the resin porous substrate, and the solvent is dried to form a heat resistant insulating layer.
- NMP N-methyl-2-pyrrolidone
- PVDF polyvinylidene fluoride
- the coating method is not particularly limited, and examples thereof include a knife coater method, a gravure coater method, a screen printing method, a Mayer bar method, a die coater method, a reverse roll coater method, an ink jet method, a spray method, and a roll coater method.
- the basis weight ratio can be controlled within a predetermined range by adjusting the coating amount of the dispersion liquid on the resin porous substrate. For example, the coating amount can be adjusted so that the basis weight of the heat-resistant insulating layer is about 5 to 20 g / m 2 .
- the temperature at which the solvent is removed is not particularly limited and can be appropriately set depending on the solvent used.
- the temperature is preferably 50 to 70 ° C.
- NMP is used as the solvent
- the temperature is preferably 70 to 90 ° C.
- the solvent may be dried under reduced pressure. Further, a part of the solvent may be left without being completely removed.
- the separator with a heat-resistant insulating layer which is a preferred embodiment of the separator 17 has been described in detail, the technical scope of the present invention is not limited to such a form. In other words, even if the separator has a configuration other than the separator with a heat-resistant insulating layer, the predetermined functions and effects of the present application can be similarly exhibited as long as the requirements specified in the claims are satisfied.
- R zjis (2) and R zjis (4) are each preferably 1.0 to 4.0 ⁇ m, more preferably 1.0 to 3.0 ⁇ m.
- R zjis (2) and R zjis (4) may be the same or different, but are preferably the same.
- the material which comprises a current collector plate (25, 27) is not restrict
- a constituent material of the current collector plate for example, metal materials such as aluminum, copper, titanium, nickel, stainless steel (SUS), and alloys thereof are preferable. From the viewpoint of light weight, corrosion resistance, and high conductivity, aluminum and copper are more preferable, and aluminum is particularly preferable.
- the positive electrode current collector plate 25 and the negative electrode current collector plate 27 may be made of the same material or different materials.
- a laminate sheet 29 as shown in FIG. 1 can be used.
- the laminate sheet may be configured as a three-layer structure in which polypropylene, aluminum, and nylon are laminated in this order.
- a conventionally known metal can case can also be used as an exterior.
- the surface roughness (R zjis ) of the surface of the member (separator or active material layer) was measured with a laser microscope. Specifically, the surface of 128 ⁇ m ⁇ 100 ⁇ m was observed, and the surface roughness (R zjis ) in the range of 128 ⁇ m was measured from the on-line cross-sectional profile at an arbitrary location.
- Example 1 (Preparation of negative electrode) Artificial graphite (average particle size: 15 ⁇ m) 96.5% by mass as a negative electrode active material and 3.5% by mass of polyvinylidene fluoride (PVDF) as a binder are dispersed in N-methyl-2-pyrrolidone (NMP) to prepare a slurry. Prepared.
- PVDF polyvinylidene fluoride
- This slurry was applied to one side of a 10 ⁇ m thick copper foil serving as a negative electrode current collector with a die coater, dried at 120 ° C. for 3 minutes, and then compression molded with a roll press.
- the application amount (weight per unit area) of the solid content (active material and binder) of the negative electrode is 106 g / m 2
- the slurry application amount and the pressing conditions are set so that the bulk density of the active material layer is 1.35 g / cm 3. It was adjusted.
- the surface roughness (R zjis (1)) of the surface of the negative electrode active material layer of the negative electrode thus produced was 5.91 ⁇ m.
- This slurry was applied to one side of a 20 ⁇ m thick aluminum foil serving as a positive electrode current collector with a die coater, dried at 130 ° C. for 3 minutes, and then compression molded with a roll press.
- the coating amount (weight per unit area) of the solid content (active material, conductive material, and binder) of the positive electrode is 250 g / m 2, and the slurry coating amount so that the bulk density of the active material layer is 3.00 g / cm 3 .
- press conditions were adjusted.
- the surface roughness (R zjis (3)) of the positive electrode active material layer of the positive electrode thus produced was 2.46 ⁇ m.
- a separator with a heat-resistant insulating layer in which heat-resistant insulating layers (thickness: 5 ⁇ m each) were disposed on both surfaces of a polyolefin resin porous film (thickness: 30 ⁇ m) obtained by biaxial stretching was produced.
- alumina particles BET specific surface area: 5 m 2 / g, average particle size: 0.48 ⁇ m
- polyethylene as a binder
- this slurry was applied on a polyolefin resin porous film (thickness: 16 ⁇ m) using a gravure coater, and then dried at 60 ° C. to remove water, thereby preparing a separator with a heat-resistant insulating layer.
- Example 2 In the heat-resistant insulating layer constituting the separator with the heat-resistant insulating layer, Example 1 described above except that alumina particles which are inorganic particles have a BET specific surface area of 15 m 2 / g and an average particle size of 0.55 ⁇ m. Each member was prepared and prepared by the same method as described above.
- Example 3 In the heat-resistant insulating layer constituting the separator with the heat-resistant insulating layer, Example 1 described above except that alumina particles which are inorganic particles have a BET specific surface area of 52 m 2 / g and an average particle diameter of 2.8 ⁇ m. Each member was prepared and prepared by the same method as described above.
- each member was prepared and prepared by the same method as in Example 3 described above, except that the negative electrode active material contained in the negative electrode active material layer had an average particle size of 12 ⁇ m.
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Abstract
Description
本実施形態に係るリチウムイオン二次電池10は、セパレータ17に接する側の負極活物質層13の表面の表面粗さ(Rzjis(1))に対する、負極活物質層13に接する側のセパレータ17の表面の表面粗さ(Rzjis(2))の比の値として定義される表面粗さ比RA(=Rzjis(2)/Rzjis(1))が、0.15~0.85である点に特徴を有する。
負極は、負極集電体11の表面に負極活物質層13が形成されてなる構造を有する。
バインダとしては、以下に制限されることはないが、ポリフッ化ビニリデン(PVDF)、カルボキシメチルセルロース(CMC)、ポリテトラフルオロエチレン(PTFE)、ポリ酢酸ビニル、およびアクリル樹脂(例えば、LSR)などの熱可塑性樹脂、ポリイミド、エポキシ樹脂、ポリウレタン樹脂、およびユリア樹脂などの熱硬化性樹脂、ならびにスチレン-ブタジエンゴム(SBR)などのゴム系材料が挙げられる。
正極は、正極集電体12の表面に正極活物質層15が形成されてなる構造を有する。
セパレータ17は、負極活物質層13と正極活物質層15との間の空間的な隔壁(スペーサ)として機能する。また、これと併せて、充放電時における正負極間でのリチウムイオンの移動媒体である非水電解質を内蔵する機能をも有する。
図2に示す形態において、多孔質基体層3は、耐熱絶縁層(5a、5b)を形成する際の基体として機能する。多孔質基体層3を構成する材料は、特に制限はないが、熱可塑性樹脂および熱硬化性樹脂などの樹脂材料、金属材料、セルロース系材料などが使用できる。このうち、耐熱絶縁層付セパレータにシャットダウン機能を付与する観点から、樹脂材料からなる多孔質基体層(以下、「樹脂多孔質基体層」とも称する)を用いることが好ましい。
耐熱絶縁層(5a、5b)は、上記多孔質基体層の片面または両面に配置され、セパレータの強度を補強する機能を有する。特に多孔質基体層が樹脂材料から構成される樹脂多孔質基体層である場合、電池温度が上昇することにより生じる内部応力を緩和し、セパレータの熱収縮による変形等を抑制する役割も果たす。当該耐熱絶縁層は、無機粒子およびバインダを含む。
集電板(25、27)を構成する材料は、特に制限されず、リチウムイオン二次電池用の集電板として従来用いられている公知の高導電性材料が用いられうる。集電板の構成材料としては、例えば、アルミニウム、銅、チタン、ニッケル、ステンレス鋼(SUS)、これらの合金等の金属材料が好ましい。軽量、耐食性、高導電性の観点から、より好ましくはアルミニウム、銅であり、特に好ましくはアルミニウムである。なお、正極集電板25と負極集電板27とでは、同一の材料が用いられてもよいし、異なる材料が用いられてもよい。
また、図示は省略するが、集電体11と集電板(25、27)との間を正極リードや負極リードを介して電気的に接続してもよい。正極および負極リードの構成材料としては、公知のリチウムイオン二次電池において用いられる材料が同様に採用されうる。なお、外装から取り出された部分は、周辺機器や配線などに接触して漏電したりして製品(例えば、自動車部品、特に電子機器等)に影響を与えないように、耐熱絶縁性の熱収縮チューブなどにより被覆することが好ましい。
外装としては、図1に示すようなラミネートシート29が用いられうる。ラミネートシートは、例えば、ポリプロピレン、アルミニウム、ナイロンがこの順に積層されてなる3層構造として構成されうる。なお、場合によっては、従来公知の金属缶ケースもまた、外装として用いられうる。
以下の実施例・比較例において、部材表面の表面粗さ(Rzjis)および動摩擦係数は、以下の手法により測定した。
レーザー顕微鏡にて、部材(セパレータまたは活物質層)表面の表面粗さ(Rzjis)を測定した。具体的には、128μm×100μmの表面を観察し、任意箇所の線上断面プロファイルより、128μmの範囲の表面粗さ(Rzjis)を測定した。
JIS No.K7125に規定される摩擦係数測定法に準拠し、セパレータ上に電極(正極または負極)を載せ、さらにその上にすべり片200gを載せて、電極の端部を引張試験機を用いて100mm/minの速度で引張った際の荷重変位を測定した。測定開始部より20~100mmの荷重平均値を動摩擦力とし、すべり片の法線力で除して動摩擦係数を算出した。
(負極の作製)
負極活物質として人造グラファイト(平均粒子径:15μm)96.5質量%、バインダとしてポリフッ化ビニリデン(PVDF)3.5質量%をN-メチル-2-ピロリドン(NMP)中に分散させてスラリーを調製した。
正極活物質としてリチウムコバルト複合酸化物(LiCoO2)を92.2質量%、導電性材料としてアセチレンブラックを4.6質量%、バインダとしてポリフッ化ビニリデン(PVDF)3.2質量%をN-メチル-2-ピロリドン(NMP)中に分散させてスラリーを調製した。
エチレンカーボネート:エチルメチルカーボネート=1:2(体積比)の混合溶媒に、溶質としてLiPF6を濃度1.0mol/Lとなるように溶解させて、非水電解液を調製した。
2軸延伸して得られたポリオレフィン樹脂多孔膜(厚さ:30μm)の両表面に耐熱絶縁層(厚さ:各5μm)が配置されてなる耐熱絶縁層付セパレータを作製した。具体的には、まず、無機粒子であるアルミナ粒子(BET比表面積:5m2/g、平均粒子径:0.48μm)95質量%およびバインダであるポリエチレン5質量%を水に分散させてスラリーを調製した。次いで、このスラリーをポリオレフィン樹脂多孔膜(厚さ:16μm)上にグラビアコーターを用いて塗布した後、60℃で乾燥して水を除去することで、耐熱絶縁層付セパレータを作製した。
耐熱絶縁層付セパレータを構成する耐熱絶縁層において、無機粒子であるアルミナ粒子としてBET比表面積:15m2/g、平均粒子径:0.55μmのものを用いたこと以外は、上述した実施例1と同様の手法により、各部材を作製・調製した。
耐熱絶縁層付セパレータを構成する耐熱絶縁層において、無機粒子であるアルミナ粒子としてBET比表面積:52m2/g、平均粒子径:2.8μmのものを用いたこと以外は、上述した実施例1と同様の手法により、各部材を作製・調製した。
負極活物質層に含まれる負極活物質として平均粒子径:12μmのものを用いたこと以外は、上述した実施例3と同様の手法により、各部材を作製・調製した。
Claims (5)
- 正極集電体の表面に正極活物質層が形成されてなる正極と、
負極集電体の表面に負極活物質層が形成されてなる負極と、
前記正極活物質層と前記負極活物質層との間に前記負極活物質層に接するように介在し、非水電解質を内蔵するセパレータと、
を含む単電池層を備える発電要素を有する非水電解質二次電池であって、
前記セパレータに接する側の前記負極活物質層の表面の表面粗さ(Rzjis(1))に対する、前記負極活物質層に接する側の前記セパレータの表面の表面粗さ(Rzjis(2))の比の値RA(=Rzjis(2)/Rzjis(1))が、0.15~0.85である、非水電解質二次電池。 - 前記セパレータが、
多孔質基体層と、
前記多孔質基体層の片面または両面に形成された無機粒子およびバインダを含む耐熱絶縁層と、
を備える耐熱絶縁層付セパレータである、請求項1に記載の非水電解質二次電池。 - 前記セパレータが前記正極活物質層にも接するように前記正極活物質層と前記負極活物質層との間に介在し、前記セパレータに接する側の正極活物質層の表面の表面粗さ(Rzjis(3))に対する、前記正極活物質層に接する側の前記セパレータの表面の表面粗さ(Rzjis(4))の比の値RB(=Rzjis(4)/Rzjis(3))が、0.15~1.5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RBが、前記RAよりも大きい、請求項3に記載の非水電解質二次電池。
- 前記RBが、0.5以上である、請求項3または4に記載の非水電解質二次電池。
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RU2014138819/07A RU2569670C1 (ru) | 2012-02-28 | 2013-01-29 | Аккумуляторная батарея с неводным электролитом |
US14/381,077 US10224527B2 (en) | 2012-02-28 | 2013-01-29 | Non-aqueous electrolyte secondary battery |
EP13754361.7A EP2822080B1 (en) | 2012-02-28 | 2013-01-29 | Non-aqueous electrolyte secondary battery |
KR1020147023837A KR101623674B1 (ko) | 2012-02-28 | 2013-01-29 | 비수전해질 이차 전지 |
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- 2013-01-29 US US14/381,077 patent/US10224527B2/en active Active
- 2013-01-29 WO PCT/JP2013/051886 patent/WO2013129009A1/ja active Application Filing
- 2013-01-29 RU RU2014138819/07A patent/RU2569670C1/ru active
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Cited By (9)
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JP5624251B2 (ja) * | 2012-07-30 | 2014-11-12 | 帝人株式会社 | 非水電解質電池用セパレータ及び非水電解質電池 |
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WO2015034080A1 (ja) * | 2013-09-09 | 2015-03-12 | 宇部興産株式会社 | セパレータ及びそれを用いた蓄電デバイス |
JPWO2015034080A1 (ja) * | 2013-09-09 | 2017-03-02 | 宇部興産株式会社 | セパレータ及びそれを用いた蓄電デバイス |
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CN107078272A (zh) * | 2014-10-23 | 2017-08-18 | 赛昂能源有限公司 | 用于电化学电池的离子传导复合材料 |
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WO2019102883A1 (ja) * | 2017-11-21 | 2019-05-31 | マクセルホールディングス株式会社 | 非水電解質電池 |
Also Published As
Publication number | Publication date |
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KR20140121457A (ko) | 2014-10-15 |
EP2822080B1 (en) | 2015-12-23 |
RU2569670C1 (ru) | 2015-11-27 |
MX2014010347A (es) | 2014-11-13 |
BR112014021393B1 (pt) | 2021-03-02 |
KR101623674B1 (ko) | 2016-05-23 |
CN104205465B (zh) | 2017-11-10 |
CN104205465A (zh) | 2014-12-10 |
US10224527B2 (en) | 2019-03-05 |
EP2822080A1 (en) | 2015-01-07 |
MX340420B (es) | 2016-07-08 |
MY167670A (en) | 2018-09-21 |
US20150017510A1 (en) | 2015-01-15 |
JP5910164B2 (ja) | 2016-04-27 |
EP2822080A4 (en) | 2015-04-01 |
JP2013178952A (ja) | 2013-09-09 |
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