WO2015133097A1 - 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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- WO2015133097A1 WO2015133097A1 PCT/JP2015/000998 JP2015000998W WO2015133097A1 WO 2015133097 A1 WO2015133097 A1 WO 2015133097A1 JP 2015000998 W JP2015000998 W JP 2015000998W WO 2015133097 A1 WO2015133097 A1 WO 2015133097A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—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
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
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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
- 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
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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 using a non-aqueous electrolyte containing monofluorotoluene.
- Non-aqueous electrolyte secondary batteries represented by lithium ion secondary batteries have high energy density and are widely used in mobile phones, notebook PC power supplies, etc., and in recent years, they are used as power sources for automobiles such as electric vehicles. Has also been considered.
- the nonaqueous electrolyte secondary battery includes a positive electrode plate in which a positive electrode mixture layer containing a positive electrode active material is formed on the surface of a positive electrode current collector, and a negative electrode mixture layer containing a negative electrode active material on the surface of the negative electrode current collector It is possible to charge / discharge by making the negative electrode plate formed with the electrode face each other through an electrically separating separator and transferring ions between the positive electrode and the negative electrode through a non-aqueous electrolyte in which a supporting salt is dissolved in a non-aqueous solvent. Designed to be
- the non-aqueous electrolyte secondary battery is normally controlled so that the voltage does not exceed a predetermined region, but if the current is forcibly supplied to the battery for some reason, the battery has exceeded the storage capacity of the battery. There may be an overcharge condition with voltage. In such an overcharged state, the nonaqueous solvent may undergo an oxidative decomposition reaction on the surface of the positive electrode, or lithium metal may be deposited in a dendritic form on the negative electrode, causing a short circuit. This is an important issue for non-aqueous electrolyte secondary batteries.
- Overcharge inhibitors include compounds that form a film with high resistance on the surface of the active material by oxidative polymerization in an overcharged state, compounds that cause self-discharge and internal short circuit by oxidation-reduction reactions, or internal pressure-operated Compounds that actuate shut-off valves are known.
- Patent Document 1 discloses that aromatic compounds such as toluene, ethylbenzene, cyclohexylbenzene, 4-t-butyltoluene, and biphenyl can be used as an overcharge inhibitor.
- monofluorotoluene has a function as an overcharge inhibitor. And when the battery containing monofluorotoluene becomes an overcharged state, it is desired that the effect of preventing the overcharge of monofluorotoluene appears more quickly.
- An object of this invention is to provide the nonaqueous electrolyte secondary battery which improved the overcharge prevention effect of the nonaqueous electrolyte containing monofluorotoluene.
- the present inventor has improved the overcharge prevention effect of monofluorotoluene by incorporating a specific fluorophosphate compound in a nonaqueous electrolyte containing monofluorotoluene. I found out that I can do it.
- a first aspect of the present invention is a nonaqueous electrolyte secondary battery including a nonaqueous electrolyte, wherein the nonaqueous electrolyte is monofluorotoluene and a fluorophosphate compound represented by the following general formula (1) And the content of the monofluorotoluene is 10% by mass or less based on the mass of the nonaqueous electrolyte, and the content of the fluorophosphate compound represented by the general formula (1) is the nonaqueous electrolyte. It is a nonaqueous electrolyte secondary battery which is 6 mass% or less with respect to the mass of.
- R 1 represents an alkali metal element or an alkyl group having 1 to 3 carbon atoms
- R 2 represents fluorine
- 1 carbon atom Represents an alkoxy group of ⁇ 3.
- the nonaqueous electrolyte secondary battery which improved the overcharge prevention effect of the nonaqueous electrolyte containing monofluorotoluene can be provided.
- FIG. 1 is a schematic cross-sectional view of one embodiment of the nonaqueous electrolyte secondary battery of the present invention.
- FIG. 2 is a schematic diagram showing a power storage device provided with the nonaqueous electrolyte secondary battery of the present invention.
- FIG. 3 is a schematic view showing an automobile provided with a power storage device provided with the nonaqueous electrolyte secondary battery of the present invention.
- the fluorophosphate compound represented by the general formula (1) is lithium difluorophosphate and lithium monofluorophosphate. It is 1 or more types.
- the fluorophosphate compound represented by the general formula (1) is lithium difluorophosphate.
- the monofluorotoluene is 2-fluorotoluene.
- the content of monofluorotoluene is 8 mass relative to the mass of the nonaqueous electrolyte. % Or less.
- the content of the fluorophosphate compound represented by the general formula (1) is: It is 4 mass% or less with respect to the mass of a nonaqueous electrolyte.
- the positive electrode, the negative electrode, the separator, and the insulating layer are provided. And the negative electrode.
- the insulating layer is a porous layer containing an inorganic oxide.
- the insulating layer is formed on a surface of the separator that faces the positive electrode.
- a tenth aspect of the present invention is an assembled battery in which a plurality of nonaqueous electrolyte secondary batteries according to any one of the first to ninth aspects are provided.
- An eleventh aspect of the present invention is a power storage device including the assembled battery according to the tenth aspect.
- a twelfth aspect of the present invention is an automobile provided with the power storage device according to the eleventh aspect.
- a thirteenth aspect of the present invention is a plug-in hybrid vehicle provided with the power storage device according to the eleventh aspect.
- a fourteenth aspect of the present invention is a method for manufacturing a nonaqueous electrolyte secondary battery comprising a nonaqueous electrolyte, comprising monofluorotoluene and a fluorophosphate compound represented by the general formula (1).
- a non-aqueous electrolyte the content of monofluorotoluene is 10% by mass or less based on the mass of the non-aqueous electrolyte, and the content of the fluorophosphate compound represented by the general formula (1) is the mass of the non-aqueous electrolyte.
- It is a manufacturing method of the nonaqueous electrolyte secondary battery which is 6 mass% or less with respect to this. Such a manufacturing method makes it possible to manufacture a nonaqueous electrolyte secondary battery in which the effect of preventing overcharge of a nonaqueous electrolyte containing monofluorotoluene is improved.
- the nonaqueous electrolyte secondary battery of the present invention is a nonaqueous electrolyte secondary battery comprising a nonaqueous electrolyte having a specific composition.
- the nonaqueous electrolyte secondary battery of the present invention may include a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode in addition to the nonaqueous electrolyte.
- members constituting the nonaqueous electrolyte secondary battery of the present invention will be described in detail.
- the nonaqueous electrolyte used for the nonaqueous electrolyte secondary battery of the present invention contains monofluorotoluene and a specific fluorophosphate compound.
- monofluorotoluene and a specific fluorophosphoric acid compound coexist in the nonaqueous electrolyte, it becomes possible to improve the overcharge prevention effect by monofluorotoluene.
- the film derived from the fluorophosphate compound represented by the general formula (1) is formed at the positive electrode-nonaqueous electrolyte interface, so that the monofluorotoluene becomes positive-nonaqueous in the overcharged state of the battery. It is conceivable that a selective oxidation reaction is performed at the electrolyte interface and the oxidative decomposition reaction of the nonaqueous solvent is suppressed.
- the viscosity of the non-aqueous electrolyte is reduced to increase the permeability, and the battery performance such as cycle characteristics is not impaired when the battery is not in an overcharged state. It is possible.
- Monofluorotoluene is not particularly limited with respect to the bonding site of the fluorine atom, and may be any of the ortho, meta, and para positions, or a mixture thereof.
- monofluorotoluene metalfluorotoluene or orthofluorotoluene in which the binding site of the fluorine atom is in the meta position or ortho position is preferable because the reaction initiation potential is high.
- monofluorotoluene in which the binding site of the fluorine atom is para-positioned has a high reaction speed, but has a low reaction initiation potential, so that the battery reacts in a normal operating voltage range where the battery is not overcharged. Therefore, the battery characteristics may be adversely affected.
- the nonaqueous electrolyte of the present invention contains 10% by mass or less of monofluorotoluene with respect to the total mass of the nonaqueous electrolyte.
- the content of monofluorotoluene is not particularly limited as long as it is 10% by mass or less with respect to the mass of the nonaqueous electrolyte, but it is preferably 8% by mass or less.
- the content of monofluorotoluene is preferably 0.5% by mass or more, more preferably 2% by mass or more, and still more preferably 4% by mass or more, based on the mass of the nonaqueous electrolyte.
- the overcharge preventing effect can be sufficiently exhibited, which is preferable.
- the content of monofluorotoluene exceeds 10% by mass with respect to the mass of the nonaqueous electrolyte, the ionic conductivity of the nonaqueous electrolyte is lowered and the input / output characteristics of the battery are lowered, which is not preferable.
- the fluorophosphate compound used in the present invention is a compound represented by the following general formula (1).
- R 1 represents an alkali metal element or an alkyl group having 1 to 3 carbon atoms.
- R 1 is preferably a lithium atom or an alkyl group having 1 to 3 carbon atoms, more preferably lithium or an alkyl group having 1 or 2 carbon atoms, still more preferably lithium.
- R 2 represents fluorine, a group —OA (A represents an alkali metal), or an alkoxy group having 1 to 3 carbon atoms.
- R 2 is preferably fluorine, a group —O—Li, or an alkoxy group having 1 to 3 carbon atoms, more preferably fluorine, a group —O—Li, or an alkoxy group having 1 or 2 carbon atoms, still more preferably fluorine. Or the group -O-Li.
- fluorophosphate compound represented by the general formula (1) include lithium difluorophosphate [in the general formula (1), R 1 is lithium, R 2 is fluorine], lithium monofluorophosphate [general In formula (1), R 1 is lithium, R 2 is a group —O—Li], methyl difluorophosphate [in general formula (1), R 1 is a methyl group, R 2 is fluorine], ethyl difluorophosphate [
- R 1 is an ethyl group
- R 2 is fluorine
- propyl difluorophosphate in general formula (1), R 1 is a propyl group
- R 2 is fluorine] dimethyl monofluorophosphate [general In formula (1), R 1 is a methyl group, R 2 is a methoxy group], diethyl monofluorophosphate [in general formula (1), R 1 is an ethyl group, R 2 is an ethoxy group], ethyl monofluorophosphate -
- fluorophosphate compounds represented by the general formula (1) may be used singly or in combination of two or more.
- the non-aqueous electrolyte of the present invention contains the fluorophosphate compound represented by the general formula (1) in an amount of 6% by mass or less based on the total mass of the non-aqueous electrolyte.
- the content of the fluorophosphate compound represented by the general formula (1) is not particularly limited as long as it is 6% by mass or less, preferably 4% by mass or less, based on the mass of the nonaqueous electrolyte. More preferably, it is 2% by mass or less, and still more preferably 2% by mass or less.
- the content of the fluorophosphate compound represented by the general formula (1) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and even more based on the mass of the non-aqueous electrolyte. Preferably it is 0.5 mass% or more. By satisfying such a content, the overcharge prevention effect can be improved. Moreover, when the content of the fluorophosphate compound represented by the general formula (1) is 4% by mass or less with respect to the mass of the nonaqueous electrolyte, it is preferable that the nonaqueous electrolyte is hardly colored.
- the non-aqueous electrolyte includes a supporting salt.
- the supporting salt used for the non-aqueous electrolyte is not particularly limited, and lithium salts that are stable in a wide potential region generally used for non-aqueous electrolyte secondary batteries can be used.
- Examples of the supporting salt include LiBF 4 , LiPF 6 , LiClO 4 , LiCF 3 SO 3 , LiN (CF 3 SO 2 ) 2 , LiN (C 2 F 5 SO 2 ) 2 , LiN (CF 3 SO 2 ) (C 4 F 9 SO 2), LiC (CF 3 SO 2) 3, LiB (C 2 O 4) 2, LiC (C 2 F 5 SO 2) 3 and the like.
- These supporting salts may be used alone or in combination of two or more.
- the content of the supporting salt in the non-aqueous electrolyte is not particularly limited, and may be appropriately set according to the type of the supporting salt to be used, the type of the non-aqueous solvent, etc., preferably 5.0 mol / L or less, more preferably Is desirably 2.0 mol / L or less. Further, the content of the supporting salt in the nonaqueous electrolyte is preferably 0.1 mol / L or more, more preferably 0.8 mol / L or more.
- the non-aqueous electrolyte includes a non-aqueous solvent in order to dissolve the above-described components.
- the nonaqueous solvent used for the nonaqueous electrolyte is not particularly limited, and an organic solvent generally used as the nonaqueous solvent for the nonaqueous electrolyte can be used.
- Examples of the non-aqueous solvent include propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate. These non-aqueous solvents may be used alone or in combination of two or more.
- the nonaqueous electrolyte includes a negative electrode film forming agent and a positive electrode protective agent as necessary.
- a negative electrode film forming agent include vinylene carbonate and vinyl ethylene carbonate.
- a positive electrode protective agent include propane sultone.
- the content of these additives in the non-aqueous electrolyte is not particularly limited and may be appropriately set according to the type of the additive, etc., but preferably 5 mass with respect to the mass of the non-aqueous electrolyte. % Or less is desirable. Further, the content of the additive is preferably 0.01% by mass or more, more preferably 0.2% by mass with respect to the mass of the nonaqueous electrolyte.
- a positive electrode plate in which a positive electrode mixture layer is formed on a positive electrode current collector is used.
- the positive electrode mixture layer contains a positive electrode active material.
- the positive electrode active material is not particularly limited as long as it can reversibly occlude and release lithium ions, and may be an inorganic compound or an organic compound.
- Specific examples of the inorganic compound used as the positive electrode active material include lithium nickel composite oxide (eg, Li x NiO 2 ), lithium cobalt composite oxide (eg, Li x CoO 2 ), lithium nickel cobalt composite oxide.
- LiNi 1-y Co y O 2 lithium nickel cobalt manganese composite oxide (for example, LiNi x Co y Mn 1-xy O 2 ), spinel type lithium manganese composite oxide (Li x Mn 2 O 4, etc.) ), lithium phosphates having an olivine structure (e.g., Li x FePO 4, Li x Fe 1-y Mn y PO 4 and the like) and the like.
- the organic compound used as the positive electrode active material include conductive polymer materials such as polyaniline and polypyrrole, disulfide polymer materials, and carbon fluoride. These positive electrode active materials may be used individually by 1 type, and may be used in combination of 2 or more type.
- the positive electrode mixture layer may contain additives such as a conductive agent, a binder, and a filler as necessary.
- Examples of the conductive agent include conductive materials such as carbon black, acetylene black, ketjen black, carbon whisker, carbon fiber, metal (copper, nickel, aluminum, silver, gold, etc.) powder, metal fiber, and conductive ceramic material. Is mentioned. These electrically conductive agents may be used individually by 1 type, and may be used in combination of 2 or more type.
- binder examples include polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), vinylidene fluoride-hexafluoropropylene copolymer, styrene-butadiene rubber (SBR), polyacrylonitrile, fluorine rubber, and the like. It is done. These binders may be used individually by 1 type, and may be used in combination of 2 or more type. When styrene-butadiene rubber is used as the binder, it is preferable to add carboxymethyl cellulose (CMC) as a thickener.
- CMC carboxymethyl cellulose
- metal materials such as aluminum, a tantalum, niobium, titanium, hafnium, a zirconium, zinc, tungsten, bismuth, and an alloy containing these metals; carbon Examples thereof include carbonaceous materials such as cloth and carbon paper. Among these, aluminum is preferable.
- the positive electrode used in the present invention is prepared by coating the positive electrode mixture on the positive electrode current collector so as to have a predetermined shape, and adjusting the density and thickness of the positive electrode mixture layer by drying, roll pressing, or the like. Is done. Known methods and conditions such as coating and drying may be employed.
- a negative electrode plate having a negative electrode mixture layer formed on a negative electrode current collector is used.
- the negative electrode mixture layer includes a negative electrode active material.
- the negative electrode active material is not particularly limited as long as it can reversibly store and release lithium ions.
- Specific examples of the negative electrode active material include amorphous carbon such as non-graphitizable carbon (hard carbon) and graphitizable carbon (soft carbon); graphite; Al, Si, Pb, Sn, Zn, Cd, etc. Alloys of these metals and lithium; tungsten oxide; molybdenum oxide; iron sulfide; titanium sulfide; lithium titanate and the like.
- These negative electrode active materials may be used individually by 1 type, and may be used in combination of 2 or more type.
- the negative electrode mixture layer may contain additives such as a conductive agent, a binder, and a filler as necessary. About the kind of these additives, it is the same as that of what is mix
- a negative electrode collector used for a negative electrode For example, metal materials, such as copper, nickel, stainless steel, nickel plating steel, chromium plating steel, are mentioned. Among these, copper is preferable from the viewpoint of ease of processing and cost.
- the negative electrode used in the present invention is prepared by coating the negative electrode mixture on the negative electrode current collector so as to have a predetermined shape, and adjusting the density and thickness of the negative electrode mixture layer by drying, roll pressing, etc. Is done. Known methods and conditions such as coating and drying may be employed.
- the separator used in the nonaqueous electrolyte secondary battery of the present invention is not particularly limited as long as it has insulating properties, and a microporous film, a nonwoven fabric, or the like is used.
- the material constituting the separator include polyolefin resins such as polyethylene and polypropylene. These materials may be used individually by 1 type, and may be used in combination of 2 or more type.
- the separator can be disposed between the positive electrode and the negative electrode.
- an insulating layer may be disposed between the positive electrode and the negative electrode, separately from the separator.
- the insulating layer can be an insulating porous layer, for example, a porous layer containing an inorganic oxide, a porous layer containing resin beads, or a porous layer containing a heat resistant resin such as an aramid resin. Etc. can be adopted.
- the insulating layer is preferably a porous layer containing an inorganic oxide.
- the porous layer containing the inorganic oxide as the insulating layer may contain a binder or a thickener as necessary.
- the binder and the thickener contained in the porous layer are not particularly limited, and for example, the same one used for the mixture layer (positive electrode mixture layer or negative electrode mixture layer) should be used. Can do.
- the inorganic oxide known ones can be used, but inorganic oxides excellent in chemical stability are preferred. Examples of such inorganic oxides include alumina, titania, zirconia, magnesia, silica, boehmite and the like. It is preferable to use a powdered inorganic oxide.
- the average particle size of the inorganic oxide is not particularly limited, but is preferably 10 ⁇ m or less, more preferably 8 ⁇ m or less, even more preferably 5 ⁇ m or less, and even more preferably 3 ⁇ m or less.
- the average particle size of the inorganic oxide is not particularly limited, but is preferably 0.01 ⁇ m or more, more preferably 0.05 ⁇ m or more, and still more preferably 0.1 ⁇ m or more.
- An inorganic oxide can be used individually or in combination of 2 or more types.
- the insulating layer can be formed at any one or more of the surfaces of one side of the separator, both surfaces of the separator, the surface of the positive electrode mixture layer, and the surface of the negative electrode mixture layer. Further, when an insulating layer is formed on the surface of the mixture layer, it is sufficient that at least a part of the mixture layer is covered with the insulating layer, and the entire surface of the mixture layer may be covered with the insulating layer.
- a known method for forming the insulating layer a known method can be employed.
- a mixture for forming an insulating layer containing an inorganic oxide and a binder is used on one surface of the separator and both surfaces of the separator. It can form by apply
- the content of the binder is not particularly limited, but is preferably 20 with respect to the total amount of the inorganic oxide and the binder. It is desirable that the content be 10% by mass or less, more preferably 10% by mass or less. Further, the content of the binder is preferably 1% by mass or more, more preferably 2% by mass or more with respect to the total amount of the inorganic oxide and the binder. By satisfying such a range, the mechanical strength and lithium ion conductivity of the insulating layer can be achieved in a balanced manner.
- the thickness of the insulating layer is not particularly limited, but is preferably 20 ⁇ m or less, more preferably 15 ⁇ m or less. Further, the thickness of the insulating layer is preferably 2 ⁇ m or more, more preferably 4 ⁇ m or more.
- the form in which the insulating layer is formed on the surface (one surface or both surfaces) of the separator is compared with the form in which the insulating layer is formed on the surface of the mixture layer (positive electrode mixture layer or negative electrode mixture layer). Since a layer in which the mixture layer and the insulating layer are mixed is not formed at the interface between the mixture layer and the insulating layer, the conductive path in the mixture layer is favorably maintained, which is preferable.
- the form in which the insulating layer is formed on the surface of the separator facing the positive electrode is a porous layer compared to the form of the insulating layer formed on the surface of the separator facing the negative electrode Since an insulating layer that can hold the electrolyte satisfactorily exists near the positive electrode surface, a large amount of the fluorophosphate compound represented by the general formula (1) is present at the positive electrode-non-aqueous electrolyte interface, and is represented by the general formula (1). The formation of a low-resistance film derived from a fluorophosphate compound is promoted, which is preferable.
- Other battery components include terminals, insulating plates, battery cases, etc. In the nonaqueous electrolyte secondary battery of the present invention, these components may be used as they are. There is no problem.
- the configuration of the nonaqueous electrolyte secondary battery of the present invention is not particularly limited, and examples thereof include a cylindrical battery having a positive electrode, a negative electrode, and a roll separator, a square battery, a flat battery, and the like.
- the nonaqueous electrolyte secondary battery of the present invention is produced by using a nonaqueous electrolyte containing monofluorotoluene and the fluorophosphate compound represented by the general formula (1).
- the nonaqueous electrolyte secondary battery of the present invention is manufactured by assembling a nonaqueous electrolyte secondary battery using a nonaqueous electrolyte, a positive electrode, a negative electrode, and a separator.
- the power storage device 30 includes a plurality of power storage units 20. Each power storage unit 20 is composed of an assembled battery including a plurality of nonaqueous electrolyte secondary batteries 1.
- the power storage device 30 can be mounted as a power source for vehicles such as an electric vehicle (EV), a hybrid vehicle (HEV), and a plug-in hybrid vehicle (PHEV).
- EV electric vehicle
- HEV hybrid vehicle
- PHEV plug-in hybrid vehicle
- the power storage device 30 in which the nonaqueous electrolyte secondary battery of the present invention is used can be mounted on the automobile 100 as a power source for automobiles such as an electric vehicle (EV), a hybrid vehicle (HEV), and a plug-in hybrid vehicle (PHEV).
- a power source for automobiles such as an electric vehicle (EV), a hybrid vehicle (HEV), and a plug-in hybrid vehicle (PHEV).
- PHEV plug-in hybrid vehicle
- Batteries mounted as a power source for plug-in hybrid vehicles (PHEV) tend to be overcharged when using batteries, compared to batteries mounted as a power source for electric vehicles (EV) or hybrid vehicles (HEV). Therefore, the usefulness of applying the present invention is great. That is, the nonaqueous electrolyte secondary battery of the present invention is preferable when used as a power source for a plug-in hybrid vehicle (PHEV) because the effects of the present invention can be used more effectively.
- the charging mode of the power source used for the plug-in hybrid vehicle includes the charging mode of the power source used for the electric vehicle (EV) (the mode in which the power source is charged at the charging stand) and the power source used for the hybrid vehicle (HEV). Therefore, the power source of the plug-in hybrid vehicle (PHEV) is compared with the power source of the electric vehicle (EV) or the hybrid vehicle (HEV). It becomes easy to become an overcharge state.
- batteries mounted as power sources for plug-in hybrid vehicles (PHEVs) tend to set a wider range of SOC (State Of Charge) than batteries mounted as power sources for hybrid vehicles (HEV). Therefore, it becomes easy to be in an overcharge state.
- FIG. 1 A schematic cross-sectional view of the nonaqueous electrolyte secondary battery of this example is shown in FIG.
- This non-aqueous electrolyte secondary battery 1 includes a positive electrode 3 formed by applying a positive electrode mixture to an aluminum current collector, and a negative electrode 4 formed by applying a negative electrode mixture to a copper current collector via a separator 5.
- the rotated power generation element 2 and the nonaqueous electrolyte are housed in a battery case 6, and the battery has a size of 34 mm width ⁇ 48 mm height ⁇ 5.0 mm thickness.
- a battery lid 7 provided with a safety valve 8 is attached to the battery case 6 by laser welding, a negative electrode terminal 9 is connected to the negative electrode 4 via a negative electrode lead 11, and a positive electrode 3 is connected to the battery lid via a positive electrode lead 10. Has been.
- the nonaqueous electrolyte secondary battery shown in FIG. 1 was manufactured as follows. 1. Production of Nonaqueous Electrolyte Secondary Battery of Example 1 (1) Production of Positive Electrode Plate LiNi 1/3 Mn 1/3 Co 1/3 O 2 as a positive electrode active material, acetylene black as a conductive additive, and polyfluoride as a binder Viscosity was obtained by adding an appropriate amount of NMP (N-methyl-2-pyrrolidone) to a mixture in which the ratio of the positive electrode active material, the conductive additive and the binder was 90% by mass, 5% by mass and 5% by mass, respectively, using vinylidene fluoride. The paste-like positive electrode mixture was prepared.
- NMP N-methyl-2-pyrrolidone
- This positive electrode mixture was applied to both sides of an aluminum foil having a thickness of 20 ⁇ m and dried to prepare a positive electrode plate.
- the positive electrode plate was provided with a portion where the aluminum foil not coated with the positive electrode mixture was exposed, and the portion where the aluminum foil was exposed and the positive electrode lead were joined.
- a separator made of a polyethylene microporous film is interposed between the positive electrode plate and the negative electrode plate, and the positive electrode plate and the negative electrode plate are wound to produce a power generation element.
- the power generation element is housed in the battery case from the opening of the battery case, the positive electrode plate lead is joined to the battery lid, the negative electrode plate lead is joined to the negative electrode terminal, and then the battery lid is fitted into the opening of the battery case.
- EC ethylene carbonate
- EMC ethyl methyl carbonate
- the nonaqueous electrolyte secondary of Example 1 having a nominal capacity of 800 mAh is obtained by injecting the nonaqueous electrolyte into the battery case from the injection port provided on the side surface of the battery case and then sealing the injection port with a stopper.
- a battery (hereinafter sometimes simply referred to as “battery”) was produced.
- Example 2 Production of Nonaqueous Electrolyte Secondary Batteries of Examples 2 to 4 and Example 17
- the lithium monofluorophosphate in Example 1 was replaced with lithium monofluorophosphate, and the inclusion of lithium monofluorophosphate with respect to the total mass of the nonaqueous electrolyte
- a battery of Example 2 was produced in the same manner as the battery of Example 1, except that the amount was 1.0% by mass.
- Example 3 The same method as the battery of Example 1 except that the lithium difluorophosphate of Example 1 was replaced with methyl difluorophosphate and the content of methyl difluorophosphate with respect to the total mass of the nonaqueous electrolyte was 1.0% by mass. A battery of Example 3 was produced.
- Example 4 The same method as the battery of Example 1 except that lithium difluorophosphate of Example 1 was replaced with ethyl difluorophosphate and the content of ethyl difluorophosphate with respect to the total mass of the nonaqueous electrolyte was 1.0 mass%. A battery of Example 4 was produced.
- Example 17 The same method as the battery of Example 1 except that the lithium difluorophosphate of Example 1 was replaced with sodium difluorophosphate and the content of sodium difluorophosphate with respect to the total mass of the nonaqueous electrolyte was 1.0% by mass. A battery of Example 17 was produced.
- Example 1 except that 2-fluorotoluene in Example 1 was replaced with 4-fluorotoluene (parafluorotoluene) and the content of 4-fluorotoluene was 5.0% by mass relative to the total mass of the nonaqueous electrolyte.
- a battery of Example 16 was produced in the same manner as the battery.
- Example 1 except that 2-fluorotoluene in Example 1 was replaced with fluorobenzene so that the content of fluorobenzene was 5.0% by mass with respect to the total mass of the nonaqueous electrolyte and no lithium difluorophosphate was contained.
- a battery of Comparative Example 3 was produced in the same manner as the battery of.
- a comparative example was made in the same manner as the battery of Example 1, except that 2-fluorotoluene in Example 1 was replaced with fluorobenzene and the content of fluorobenzene was 5.0% by mass relative to the total mass of the nonaqueous electrolyte. 4 batteries were produced.
- Evaluation Test 1 An initial discharge capacity confirmation test was conducted by using the batteries of Examples 1 to 17 and Comparative Examples 1 to 4 by the following method. Each battery was initially charged at a constant current of 800 mA up to 4.2 V at a constant current of 800 mA and further at a constant voltage of 4.2 V for 3 hours, and then discharged at a constant current of 800 mA and a final voltage of 2.5 V. The capacity was measured.
- the overcharge test at 25 degreeC was done with the following method.
- Each battery after the initial discharge capacity measurement was charged at a constant current of 800 mA up to 4.2 V at 25 ° C., and further charged at a constant voltage of 4.2 V for a total of 3 hours, so that the batteries were fully charged. Then, after charging for 1 hour (overcharge) at a constant current of 800 mA at 25 ° C., the surface temperature of the side surface portion of the battery case of the battery was measured.
- the present invention by measuring the surface temperature (battery surface temperature) of the battery case side surface portion of the battery, it was evaluated whether or not the effect of preventing overcharge of the nonaqueous electrolyte containing monofluorotoluene was improved.
- the surface temperature of the battery is low, monofluorotoluene is selectively oxidized at the positive electrode-nonaqueous electrolyte interface in the overcharged state of the battery, and the oxidative decomposition reaction of the nonaqueous solvent is suppressed.
- the amount of heat generated in the secondary battery is considered to have decreased. That is, if the battery surface temperature is low, it can be determined that the overcharge prevention effect of the nonaqueous electrolyte containing monofluorotoluene has been improved.
- Table 1 shows the overcharge test results of the batteries (Examples 1 to 17 and Comparative Examples 1 to 4) measured as described above.
- a battery (Example 1) containing 5.0% by mass of 2-fluorotoluene and 1.0% by mass of lithium difluorophosphate with respect to the total mass of the nonaqueous electrolyte contains 2-fluorotoluene.
- the battery surface temperature is low, so that the oxidative decomposition reaction of the nonaqueous solvent in the overcharged state of the battery is suppressed, and nonaqueous containing monofluorotoluene It was found that the electrolyte overcharge prevention effect was improved.
- R 1 is lithium or an alkyl group having 1 to 3 carbon atoms
- R 2 is fluorine, a group —O—Li, or 1 to 3 carbon atoms.
- the batteries (Examples 1 to 16) containing the fluorophosphate compound which is an alkoxy group had a battery surface temperature of 70 ° C. or lower.
- a battery (Example 17) containing a compound (sodium difluorophosphate) in which R 1 is sodium and R 2 is fluorine is a battery.
- the surface temperature was 71.7 ° C.
- R 1 is lithium or an alkyl group having 1 to 3 carbon atoms
- R 2 is fluorine, a group —O—Li, or 1 to 3 carbon atoms.
- a fluorophosphate compound that is an alkoxy group is preferable because the effect of preventing overcharge of a nonaqueous electrolyte containing monofluorotoluene can be further improved.
- lithium difluorophosphate, methyl difluorophosphate and difluorophosphorus which are difluorophosphate compounds which are fluorophosphate compounds represented by the general formula (1)
- the surface temperature of the battery of Example 1 using lithium difluorophosphate was the lowest. That is, it was found that lithium difluorophosphate is preferably used in order to improve the overcharge prevention effect of the nonaqueous electrolyte containing monofluorotoluene.
- lithium monofluorophosphate containing lithium in the compound like lithium difluorophosphate, lithium monofluorophosphate containing lithium in the compound [general In formula (1), R 1 is preferably lithium and R 2 is preferably a group —O—Li].
- the non-aqueous electrolyte secondary battery according to the present invention improves the effect of preventing overcharge of a non-aqueous electrolyte containing monofluoroo-toluene, suppresses temperature rise in the overcharged state of the battery, and can reduce the influence on adjacent devices. Therefore, it can be effectively used for power sources for automobiles such as electric vehicles (EV), hybrid vehicles (HEV), and plug-in hybrid vehicles (PHEV), power sources for electronic devices, and power storage power sources.
- EV electric vehicles
- HEV hybrid vehicles
- PHEV plug-in hybrid vehicles
- Nonaqueous electrolyte secondary battery 2 Power generation element 3 Positive electrode plate (positive electrode) 4 Negative electrode plate (negative electrode) DESCRIPTION OF SYMBOLS 5 Separator 6 Battery case 7 Battery cover 8 Safety valve 9 Negative electrode terminal 10 Positive electrode lead 11 Negative electrode lead 20 Power storage unit 30 Power storage device 40 Car body 100 Car
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Abstract
Description
このように、非水電解質中でモノフルオロトルエンと特定のフルオロリン酸化合物とを共存させることによって、モノフルオロトルエンの過充電防止効果を向上させることができる。
本発明の非水電解質二次電池に用いられる非水電解質は、モノフルオロトルエンと、特定のフルオロリン酸化合物とを含む。このように非水電解質中に、モノフルオロトルエンと特定のフルオロリン酸化合物とを共存させることによって、モノフルオロトルエンによる過充電防止効果を向上させることが可能になる。この要因としては、正極-非水電解質界面に、一般式(1)で表されるフルオロリン酸化合物由来の被膜が形成されることにより、電池の過充電状態においてモノフルオロトルエンが正極-非水電解質界面において選択的に酸化反応して、非水溶媒の酸化分解反応が抑制されることが考えられる。
本発明の非水電解質二次電池の正極には、正極集電体上に正極合剤層が形成された正極板が使用される。
本発明の非水電解質二次電池の負極には、負極集電体上に負極合剤層が形成された負極板が使用される。
本発明の非水電解質二次電池に用いられるセパレータは、絶縁性を備えるものであることを限度として特に制限されず、微多孔性膜や不織布等が使用される。セパレータを構成する材料としては、例えば、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂が挙げられる。これらの材料は、1種単独で使用してもよく、また2種以上を組み合わせて使用してもよい。セパレータは、正極と負極との間に配置することができる。
また、その他の電池の構成部材としては、端子、絶縁板、電池ケース等があるが、本発明の非水電解質二次電池において、これらの構成要素は従来用いられているものをそのまま用いても差し支えない。
本発明の非水電解質二次電池の構成については、特に制限されず、例えば、正極、負極及びロール状のセパレータを有する円筒型電池、角型電池、扁平型電池等が挙げられる。
本発明の非水電解質二次電池は、モノフルオロトルエンと、前記一般式(1)で表されるフルオロリン酸化合物とを含む非水電解質を用いることにより製造される。具体的には、本発明の非水電解質二次電池は、非水電解質、正極、負極、及びセパレータを用いて非水電解質二次電池を組み立てることによって製造される。
本発明の非水電解質二次電池を複数組み合わせた組電池を用いた蓄電装置を構成することができ、その一実施形態を図2に示す。蓄電装置30は、複数の蓄電ユニット20を備えている。それぞれの蓄電ユニット20は、複数の非水電解質二次電池1を備えた組電池から構成される。蓄電装置30は、電気自動車(EV)、ハイブリッド自動車(HEV)、プラグインハイブリッド自動車(PHEV)等の自動車用電源として搭載することができる。
本発明の非水電解質二次電池が用いられる蓄電装置30は、電気自動車(EV)、ハイブリッド自動車(HEV)、プラグインハイブリッド自動車(PHEV)等の自動車用電源として、自動車100に搭載することができ、その一実施形態を図3に示す。プラグインハイブリッド自動車(PHEV)の電源として搭載される電池は、電気自動車(EV)又はハイブリッド自動車(HEV)の電源として搭載される電池と比較して、電池使用時に過充電状態になり易い傾向にあるため、本発明を適用することによる有用性が大きい。すなわち、本発明の非水電解質二次電池は、プラグインハイブリッド自動車(PHEV)の電源として用いられる場合、本発明の効果をより有用に利用できるため、好ましい。
この非水電解質二次電池1は、アルミニウム集電体に正極合剤を塗布してなる正極3と、銅集電体に負極合剤を塗布してなる負極4とがセパレータ5を介して巻回された発電要素2と、非水電解質とを電池ケース6に収納してなり、寸法が幅34mm×高さ48mm×厚さ5.0mmの電池である。
1.実施例1の非水電解質二次電池の作製
(1)正極板の製造
正極活物質としてLiNi1/3Mn1/3Co1/3O2、導電助剤としてアセチレンブラック及び結着剤としてポリフッ化ビニリデンを用い、正極活物質、導電助剤及び結着剤の比率をそれぞれ90質量%、5質量%及び5質量%とした混合物にNMP(N-メチル-2-ピロリドン)を適量加えて粘度を調整し、ペースト状の正極合剤を作製した。この正極合剤を厚み20μmのアルミニウム箔の両面に塗布して乾燥させることにより正極板を作製した。正極板には正極合剤が塗布されていないアルミニウム箔が露出した部位を設け、アルミニウム箔が露出した部位と正極リードとを接合した。
負極活物質としてグラファイト(黒鉛)、結着剤としてスチレン-ブタジエンゴム(SBR)及び増粘剤としてカルボキシメチルセルロース(CMC)用い、負極活物質、結着剤及び増粘剤をそれぞれ95質量%、3質量%及び2質量%とした混合物に水を適量加えて粘度を調整し、ペースト状の負極合剤を作製した。この負極合剤を厚み10μmの銅箔の両面に塗布して乾燥させることにより負極板を作製した。負極板には負極合剤が塗布されていない銅箔が露出した部位を設け、銅箔が露出した部位と負極板リードとを接合した。
前記正極板と前記負極板との間にポリエチレン製微多孔膜からなるセパレータを介在させて、正極板と負極板とを巻回することにより発電要素を作製した。発電要素を電池ケースの開口部から電池ケース内に収納して、正極板リードを電池蓋に接合し、負極板リードを負極端子に接合した後に、電池蓋を電池ケースの開口部に勘合させてレーザー溶接で電池ケースと電池蓋とを接合することによって非水電解質が電池ケース内に注液されていない未注液状態の二次電池を作製した。
エチレンカーボネート(EC):エチルメチルカーボネート(EMC)=30:70(体積比)の混合溶媒にLiPF6を1mol/Lの濃度で溶解させ、2-フルオロトルエン(オルトフルオロトルエン)及びジフルオロリン酸リチウムをそれぞれ非水電解質の総質量に対して、5.0質量%及び1.0質量%含有させて非水電解質を調整した。この非水電解質を電池ケースの側面に設けた注液口から電池ケース内部に注液した後に、注液口を栓で封口することで公称容量が800mAhである実施例1の非水電解質二次電池(以下、単に「電池」と記載することがある)を作製した。
実施例1のジフルオロリン酸リチウムをモノフルオロリン酸リチウムに代えて、非水電解質の総質量に対するモノフルオロリン酸リチウムの含有量を1.0質量%にしたこと以外は実施例1の電池と同じ方法にて実施例2の電池を作製した。
非水電解質の総質量に対するジフルオロリン酸リチウムの含有量をそれぞれ0.05質量%、0.5質量%、1.5質量%、2.0質量%、4.0質量%、6.0質量%及び0.00質量%(ジフルオロリン酸リチウムを含有しない)にしたこと以外は実施例1の電池と同じ方法にて実施例5~10及び比較例1の電池を作製した。
非水電解質の総質量に対する2-フルオロトルエンの含有量をそれぞれ2.0質量%、4.0質量%、8.0質量%、10.0質量%及び0.00質量%(2-フルオロトルエンを含有しない)にしたこと以外は実施例1の電池と同じ方法にて実施例11~14及び比較例2の電池を作製した。
実施例1の2-フルオロトルエンを3-フルオロトルエン(メタフルオロトルエン)に代えて、非水電解質の総質量に対する3-フルオロトルエンの含有量を5.0質量%にしたこと以外は実施例1の電池と同じ方法にて実施例15の電池を作製した。
(1)過充電試験
実施例1~17及び比較例1~4の各電池を用いて、以下の方法により初期放電容量確認試験をおこなった。各電池を、25℃において800mA定電流で4.2Vまで、さらに4.2V定電圧で、合計3時間充電した後、800mA定電流で終止電圧2.5Vの条件で放電をおこなうことにより初期放電容量を測定した。
非水電解質の質量に対して、モノフルオロトルエンを10.0質量%以下及び一般式(1)で表されるフルオロリン酸化合物を6.0質量%以下含有する電池(実施例1~17)は、電池表面温度が70℃以下となった。一方、モノフルオロトルエンを10.0質量%以下含有して一般式(1)で表されるフルオロリン酸化合物を含有しない電池(比較例1)は、電池表面温度が71.7℃を超える値となった。これは、実施例1~17の電池では、正極-非水電解質界面に一般式(1)で表されるフルオロリン酸化合物由来の低抵抗な被膜が形成され、電池の過充電状態においてモノフルオロトルエンが正極-非水電解質界面において選択的に酸化反応することで、当該正極-非水電解質界面における非水溶媒の酸化分解反応が抑制され、非水溶媒の酸化反応に伴う発熱が抑制されたためであると考えられる。即ち、例えば、非水電解質の総質量に対して、2-フルオロトルエンを5.0質量%及びジフルオロリン酸リチウムを1.0質量%含有する電池(実施例1)は、2-フルオロトルエンを5.0質量%含有する電池(比較例1)と比較して、電池表面温度が低いことから、電池の過充電状態における非水溶媒の酸化分解反応が抑制され、モノフルオロトルエンを含む非水電解質の過充電防止効果が向上していることがわかった。
2 発電要素
3 正極板(正極)
4 負極板(負極)
5 セパレータ
6 電池ケース
7 電池蓋
8 安全弁
9 負極端子
10 正極リード
11 負極リード
20 蓄電ユニット
30 蓄電装置
40 車体本体
100 自動車
Claims (14)
- 前記一般式(1)で表されるフルオロリン酸化合物が、ジフルオロリン酸リチウム及びモノフルオロリン酸リチウムの1種以上である、請求項1に記載の非水電解質二次電池。
- 前記一般式(1)で表されるフルオロリン酸化合物が、ジフルオロリン酸リチウムである、請求項1に記載の非水電解質二次電池。
- 前記モノフルオロトルエンが、2-フルオロトルエンである、請求項1乃至請求項3のいずれか一項に記載の非水電解質二次電池。
- 前記モノフルオロトルエンの含有量が、前記非水電解質の質量に対して8質量%以下である、請求項1乃至請求項4のいずれか一項に記載の非水電解質二次電池。
- 前記一般式(1)で表されるフルオロリン酸化合物の含有量が、前記非水電解質の質量に対して4質量%以下である、請求項1乃至請求項5のいずれか一項に記載の非水電解質二次電池。
- 正極、負極、セパレータ及び絶縁層を備え、
前記セパレータ及び前記絶縁層は、前記正極と前記負極との間に配置される、請求項1乃至請求項6に記載の非水電解質二次電池。 - 前記絶縁層は、無機酸化物を含有する多孔質層である、請求項7に記載の非水電解質二次電池。
- 前記絶縁層は、前記セパレータの表面のうち、前記正極と対向する表面に形成される、請求項7又は請求項8に記載の非水電解質二次電池。
- 請求項1乃至請求項9のいずれか一項に記載の非水電解質二次電池が、複数備えられる、組電池。
- 請求項10に記載の組電池が、備えられる、蓄電装置。
- 請求項11に記載の蓄電装置が、備えられる、自動車。
- 請求項11に記載の蓄電装置が、備えられる、プラグインハイブリッド自動車。
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DE112015001082.3T DE112015001082T5 (de) | 2014-03-03 | 2015-02-26 | Sekundärbatterie mit nicht-wässrigem Elektrolyten |
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JP (1) | JP6536563B2 (ja) |
CN (2) | CN111640980A (ja) |
DE (1) | DE112015001082T5 (ja) |
WO (1) | WO2015133097A1 (ja) |
Cited By (5)
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WO2016024496A1 (ja) * | 2014-08-11 | 2016-02-18 | 関東電化工業株式会社 | モノフルオロリン酸エステル塩を含む非水電解液、及びそれを用いた非水電解液電池 |
JP2016170858A (ja) * | 2015-03-11 | 2016-09-23 | 株式会社Gsユアサ | 非水電解質二次電池及び非水電解質二次電池の製造方法 |
WO2017111096A1 (ja) * | 2015-12-25 | 2017-06-29 | ステラケミファ株式会社 | 二次電池用非水電解液及びそれを備えた二次電池 |
CN107408666A (zh) * | 2015-09-25 | 2017-11-28 | 株式会社东芝 | 非水电解质电池用电极、非水电解质电池及电池包 |
EP3477758A4 (en) * | 2016-07-22 | 2019-12-25 | GS Yuasa International Ltd. | WATER-FREE ELECTROLYTE, ENERGY STORAGE ELEMENT AND METHOD FOR PRODUCING AN ENERGY STORAGE ELEMENT |
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JP6880453B2 (ja) * | 2017-09-11 | 2021-06-02 | トヨタ自動車株式会社 | 非水電解液二次電池 |
JP6883262B2 (ja) * | 2017-09-11 | 2021-06-09 | トヨタ自動車株式会社 | 非水電解液二次電池 |
JP6883263B2 (ja) | 2017-09-11 | 2021-06-09 | トヨタ自動車株式会社 | 非水電解液二次電池 |
CN112448034A (zh) * | 2019-09-05 | 2021-03-05 | 东莞市杉杉电池材料有限公司 | 一种高电压锂离子电池用非水电解液及锂离子电池 |
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Also Published As
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JPWO2015133097A1 (ja) | 2017-04-06 |
CN106063019B (zh) | 2020-06-16 |
CN106063019A (zh) | 2016-10-26 |
US10141607B2 (en) | 2018-11-27 |
DE112015001082T5 (de) | 2016-12-08 |
CN111640980A (zh) | 2020-09-08 |
JP6536563B2 (ja) | 2019-07-03 |
US20170077550A1 (en) | 2017-03-16 |
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