WO2005091422A1 - 非水電解液及びそれを用いたリチウム二次電池 - Google Patents
非水電解液及びそれを用いたリチウム二次電池 Download PDFInfo
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- WO2005091422A1 WO2005091422A1 PCT/JP2005/004923 JP2005004923W WO2005091422A1 WO 2005091422 A1 WO2005091422 A1 WO 2005091422A1 JP 2005004923 W JP2005004923 W JP 2005004923W WO 2005091422 A1 WO2005091422 A1 WO 2005091422A1
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- formate
- group
- carbon atoms
- diformate
- aqueous electrolyte
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Classifications
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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
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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
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic 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
- 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
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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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
Definitions
- Patent Literature 1 discloses ethylene glycol diacetate and Patent Literature 2 discloses an acetate such as butyl acetate and a diacetate such as ethylene diacetate.
- Reference 3 describes vinyl acetate
- Patent Reference 4 describes aryl acetate. It is disclosed and suggests an improvement in cycle life.
- Patent Document 5 discloses a secondary battery in which oxidation resistance is improved by optimizing the lithium salt concentration using a fatty acid ester such as methyl formate and the charge / discharge capacity is increased.
- a fatty acid ester such as methyl formate
- Patent Document 5 JP-A-9-306538
- the present invention solves the above-mentioned problems related to the nonaqueous electrolyte for a lithium secondary battery, has excellent cycle characteristics of the battery, and has further improved battery characteristics such as electric capacity and storage characteristics in a charged state. It is an object of the present invention to provide a non-aqueous electrolyte capable of forming a lithium secondary battery having excellent characteristics, and a lithium secondary battery using the same.
- n is an integer of 0-3
- W is a (m + n) -valent connecting group composed of carbon atoms having 3-8 carbon atoms and hydrogen atoms.
- (m + n) is 3 or 4.
- R 1 is the same as above.
- the present invention provides a lithium secondary battery comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte in which an electrolyte salt is dissolved in a non-aqueous solvent, wherein the positive electrode is a material containing a lithium composite oxide.
- the negative electrode is a material capable of occluding and releasing lithium.
- the nonaqueous electrolyte has a formic acid ester compound represented by the general formula (I)-(IV) of 0.01% Provided is a lithium secondary battery characterized by containing 10% by weight!
- X 1 to X 5 each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 16 carbon atoms, It is a xyl group or a phenyl group.
- the halogen atom include fluorine, chlorine, bromine and iodine.
- a fluorine or chlorine atom is preferred, and a fluorine atom is particularly preferred.
- the alkyl group a linear or branched alkyl group having 13 to 13 carbon atoms is preferable.
- Specific examples of the compound represented by the general formula (I) include phenyl formate, o-fluoroformate, m-fluoroformate, p-fluoroformate, and ⁇ -formate.
- -Toluene formic acid ⁇ -bromophenol, formic acid p-hordophenol, formate pentafluorophore, formate pentachlorophenol, formate pentabromophenol, formate o-tolyl, formate m-tolyl, P-tolyl formate, o-tamyl formate, m-tamale formate, p-tamale formate, 4-cyclohexyl formate, biphenyl formate, and the like.
- formate, formate o-fluorophenyl, formate m-fluorophenyl, formate p-fluorophenyl, pentafluorophenol formate, pentachlorophenol formate, 4-formate formate Cyclohexylphenol and biphenyl formate are particularly preferred.
- Examples of the alkyl group having 1 to 12 carbon atoms of R 1 include a methyl group, an ethyl group, a propyl group, an isopropyl group, various butyl groups, various pentyl groups, various hexyl groups, various heptyl groups, various octyl groups, and the like.
- Examples of the cycloalkyl group having 3 to 8 carbon atoms include a cyclopropyl group, a cyclopentyl group, and a cyclohexyl group.
- 6-12 aryl groups include fluor, tolyl, xylyl, and naphthyl groups.
- Preferred examples of the straight-chain saturated hydrocarbon group having a main chain methylene chain of 2 to 6 include an ethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, and a hexamethylene group.
- a saturated hydrocarbon group having a methylene chain of 2 to 6 in the main chain and at least one alkyl group having 14 carbon atoms as a side chain it has a straight chain or a branched chain such as an isopropyl group or an isobutyl group.
- ethylene glycol diformate 1,3 propanediol diformate, 1,4 butanediol diformate, 1,2 propanediol diformate, 1,3 Butanediol diformate, 2-methyl-1,3 propanediol diformate, and 1,1,3 trimethyl-1,3 propanediol diformate are particularly preferred.
- R is a hydrogen atom and Z is an unsaturated hydrocarbon group having a carbon-carbon triple bond
- Z 2 butylene group
- 3 toxin 2,5-diol diformate (Z 1,4 dimethyl-2 butylene group)
- Diol diformate, 2,4 oxadiin 1,6-diol diformate, 1,1,6,6-tetramethyl-2,4 oxadiin-1,6-diol diformate are particularly preferred.
- R is an alkyl group and Z is an unsaturated hydrocarbon group having a carbon-carbon triple bond
- Z 2-butyne 1,4-diol formate acetate
- 2-butyne 1,4-diol formate acetate, 3xin 2,5-diol formate acetate, 2,4 oxadiin 1,6-diol formate acetate, 2,5 dimethyl-3-toxin 2, 5-diol formate acetate, 1,1,6,6-tetramethyl-2,4 oxadiyne 1,6-diol formate acetate are particularly preferred.
- 2-butyne 1,4-diol formate cyclopropanecarboxylate 2- Butyne 1,4-diol formate cyclobutane carboxylate and 3-xin-2,5-diol formate cyclopropane carboxylate are particularly preferred!
- specific examples of the compound in which R is an aryl group and Z is an unsaturated hydrocarbon group having a carbon-carbon double bond include 2-butene 1
- R is an aryl group and Z is an unsaturated hydrocarbon group having a carbon-carbon triple bond
- Z 2-butyne 1,4-diol formate benzoate
- Z 2-butyl -Lene group
- HZ 1,1,4,4-tetramethyl-2-butylene group)
- 2-butyne 1,4-diol formate benzoate and 3-hexyne 2,5-diol formate benzoate are particularly preferred! /.
- R 2 is a linear or branched alkyl group having 412 carbon atoms
- R 3 — R 5 are each independently a hydrogen atom or an alkyl group having 18 carbon atoms.
- R 7 -R 9 are each independently a straight-chain or branched-chain alkyl group having 120 carbon atoms, a straight-chain or branched-chain alkyl group having 120 carbon atoms
- 1 represents 20 linear or branched alkyl groups
- m represents an integer of 0-10
- n represents an integer of 1-10.
- the alkyl group of R 3 to R 5 is an alkyl group having 18 carbon atoms.
- the specific examples of the methyl group, ethyl group, and propyl group, among the specific examples of R 2 The same thing as the one in 18 is mentioned.
- the alkyl group of R 7 to R 9 is an alkyl group having a carbon number of 112, preferably 415.
- the specific groups of the above-mentioned R 2 the methyl group, the ethyl group, and the propyl group are preferred. And the same as those having 4 to 20 carbon atoms.
- the alkenyl group of R 7 to R 9 is an alkenyl group having 112, preferably 2 to 12 carbon atoms, and examples thereof include a bur group, an aryl group and a crotyl group.
- the alkyl group represented by R 7 to R 9 is an alkyl group having 112, preferably 2 to 12 carbon atoms, such as an ethynyl group, a 2-propynyl group, a 3-butynyl group, and a 1-methyl-2-proalkyl group. And a pinyl group.
- Specific examples of the compound represented by the general formula (V) include butyl formate, pentyl formate, hexyl formate, heptyl formate, octyl formate, decyl formate, isobutyl formate, 1-methylpentyl formate, and 1-formylate -Methylhexyl, 1-methylheptyl formate, 1-ethylhexyl formate, 1-methyl-4-butyl formate, 4-methylpentyl formate, 1,1-dimethylpentyl formate and the like.
- Specific examples of the compound represented by the general formula (VI) include vinyl formate and isopropyl formate.
- Specific examples of the compound represented by the general formula (VII) include allyl formate, 1-propyl formate, 2-methyl-1-propyl formate, 2-methylaryl formate and the like.
- formate ester conjugates represented by the general formulas (VI)-(VIII) vinyl formate, aryl formate, propynyl formate, butynyl formate, 2-pentynyl formate, 1-methyl-2-propyl formate Particularly preferred are 1-methyl-2-butulate, 1,1-dimethyl-2-probyl formate, 1,1 dimethyl-2-probyl formate and 1,1-ethylmethyl-2-probyl formate.
- the content of the formate compound represented by the general formula (I)-(IV) is excessively large, the conductivity of the electrolytic solution changes, and the battery Since the performance may be deteriorated, it is preferably 10% by weight or less, particularly preferably 5% by weight or less, most preferably 3% by weight or less based on the weight of the non-aqueous electrolyte.
- the amount is excessively small, a sufficient film is not formed and the expected battery characteristics cannot be obtained.
- % Or more, especially 0.05% by weight or more is preferred, and 0.1% by weight is most preferred.
- the non-aqueous solvent used in the present invention includes, for example, ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate, fluoroethylene carbonate (FEC), and bi-lene carbonate (VC).
- Cyclic carbonates such as dimethyl bi-lene carbonate and vinyl ethylene carbonate, ratatones such as ⁇ -butyrolataton (GBL), ⁇ valero-lata-ton, ⁇ -angelic lactone, dimethyl carbonate (DMC), methyl ethyl carbonate (MEC), and ethynolecarbonate (DEC), chain carbonates such as methinolepropinole carbonate, dipropinole carbonate, methinolebutynolecarbonate, dibutinolecarbonate, tetrahydrofuran, 2-methyltetrahydrofuran, 1,4-dioxane, 1, 2 —Dimethoxyethane, 1, 2— Ethers such as ethoxyx
- Combinations combinations of cyclic carbonates, chain carbonates, and ratatones, combinations of cyclic carbonates, ethers, combinations of cyclic carbonates, chain carbonates, ethers, cyclic carbonates, chain carbonates
- Various combinations such as a combination of a chain ester and a chain ester, may be mentioned, and the mixing ratio is not particularly limited.
- the ratio of the cyclic carbonates to the chain carbonates is preferably 20:80 to 40:60, more preferably 25:75 to 35:65, in terms of volume ratio.
- the volume ratio of the asymmetric chain carbonate methyl ethyl carbonate (MEC) to the symmetric chain carbonate dimethyl carbonate (DMC) and Z or getyl carbonate (DEC) is as follows: 100ZO-51Z49 is preferred. 100Z0-70-30 is more preferable.
- the ratio of carbonates to ratatones is preferably 10: 90-40: 60 by volume, especially 20: 80-35: 65.
- electrolyte salt used in the present invention examples include LiPF, LiBF, LiCIO, and LiN (SO).
- electrolyte salts are LiPF, LiBF, and LiN (SOCF).
- Preferred combinations of these electrolyte salts include a combination of LiPF and LiBF, Combination of LiPF and LiN (SO CF), combination of LiBF and LiN (SO CF), etc.
- LiPF LiPF
- LiBF LiPF
- Electrolyte salt can be mixed in any ratio, but used in combination with LiPF
- the total electrolyte salt is usually 0.5 to 3 M, preferably 0.7 to 2.0 M, more preferably 0.8 to 1.6 M, most preferably 0.8 to 8 M in the non-aqueous solvent. 1. Can be used after dissolving at a concentration of 2M.
- the electrolytic solution of the present invention is prepared by mixing the above-mentioned non-aqueous solvent such as ethylene carbonate (EC), propylene carbonate (PC), and methyl ethyl carbonate (MEC) with the above-mentioned electrolyte salt. And dissolving the formate ester conjugate represented by the above general formula (I)-(IV).
- EC ethylene carbonate
- PC propylene carbonate
- MEC methyl ethyl carbonate
- air or carbon dioxide is injected before the non-aqueous electrolyte is injected into the battery.
- air or carbon dioxide-containing gas in the battery after injecting, before or after sealing the battery, or use a combination of these methods. You can also.
- the air and carbon dioxide-containing gas should preferably contain as little moisture as possible.
- the dew point should preferably be 40 ° C or less.
- the dew point should preferably be 50 ° C or less! / ,.
- the non-aqueous electrolyte of the present invention is used as a component of a secondary battery, particularly a lithium secondary battery.
- the constituent members other than the non-aqueous electrolyte constituting the secondary battery are not particularly limited, and various constituent members conventionally used can be used.
- positive electrodes in a fully charged state such as LiCoO, LiMn O, and LiNiO
- a part of the lithium composite metal oxide may be substituted with another element.
- a part of Co of LiCoO is Sn, Mg, Fe, Ti, Al, Zr, Cr, V, Ga,
- the amount of the conductive agent added to the positive electrode mixture is preferably 11 to 10% by weight, and particularly preferably 2 to 5% by weight.
- the negative electrode As the negative electrode (negative electrode active material), a material capable of occluding and releasing lithium is used.
- lithium metal, lithium alloy, and carbon material [pyrolytic carbons, coatas, graphites (man-made) Graphite, natural graphite, etc.), organic polymer compound burners, carbon fiber], tin, tin compounds, silicon, and silicon compounds are used.
- the lattice spacing (002) which is preferred by carbon materials, is 0.340 nm.
- Powder materials such as carbon materials include ethylene propylene diene terpolymer (EPDM), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), styrene-butadiene copolymer (SBR), It is kneaded with a binder such as a copolymer of acrylonitrile and butadiene (NBR) and carboxymethylcellulose (CMC) and used as a negative electrode mixture.
- a binder such as a copolymer of acrylonitrile and butadiene (NBR) and carboxymethylcellulose (CMC) and used as a negative electrode mixture.
- the method for manufacturing the negative electrode is not particularly limited, and the negative electrode can be manufactured by the same method as the above-described method for manufacturing the positive electrode.
- the battery separator used in the present invention varies depending on the manufacturing conditions, but has an air permeability of 50 to 1000 hectares / lOOcc power S preferred ⁇ , 100 to 800 hectares / 100cc power preferred ⁇ , 300 One 500 second ZlOOcc is most preferred. If the air permeability is too high, the lithium ion conductivity will be reduced, and if the function as a battery separator is insufficient, the mechanical strength will be reduced if the function is too low.
- the porosity is preferably 30-60%, more preferably 35-55%, most preferably 40-50%. In particular, it is preferable that the porosity be in this range because the capacity characteristics of the battery are improved. Further, it is preferable that the thickness of the battery separator be as thin as possible because the energy density can be increased. 15-25 m force S best
- the density of the electrode material layer in order to enhance the effect of adding the formate ester conjugate represented by the general formula (I)-(IV).
- the density of the positive electrode mixture layer formed on the aluminum foil is preferably 3.2-4.
- OgZcm 3 is more preferable. 3.3-3.9 g / cm 3 , most preferably 3.4-3.8 g / cm 3 . If the density of the positive electrode mixture exceeds 4.0 gZcm 3 , the production may be substantially difficult.
- the density of the negative electrode mixture layer formed on the copper foil is 1.3-2. Og / cm 3 , more preferably 1.4-1.9 g / cm 3 , and most preferably 1.5-1. It is between 8 g / cm 3 . When the density of the negative electrode mixture layer exceeds 2. Og Zcm 3 , the production may be substantially difficult.
- the preferable thickness of the positive electrode layer (per one side of the current collector) is 30 to 120 / ⁇ , preferably 50 to 100 m, and the thickness of the negative electrode layer is The thickness (per one side of the current collector) is 1 to 100 ⁇ m, preferably 3 to 70 ⁇ m. If the thickness of the electrode material layer is smaller than the above preferable range, the amount of active material in the electrode material layer is reduced, so that the battery capacity is reduced. On the other hand, if the thickness is larger than the above range, the cycle characteristics and the rate characteristics deteriorate, which is not preferable.
- Ethylene carbonate (EC): Propylene carbonate (PC): Methyl ethyl carbonate (HMEC) (volume ratio) 30: 5: 65
- a non-aqueous solvent was prepared, and LiPF was added as an electrolyte salt to a concentration of 1 M. After preparing a non-aqueous electrolyte by dissolving
- poly fluoride molds - isopropylidene (binder) were mixed at a ratio of 3% by weight, a mixture by adding thereto ⁇ this 1-methyl-2-pyrrolidone down solvent is applied onto an aluminum foil, dried, A positive electrode was prepared by pressure molding and heat treatment.
- the electrode density of the positive electrode was 3.5 gZcm 3
- the electrode density of the negative electrode was 1.6 gZcm 3
- the thickness of the positive electrode layer (per one side of the current collector) was 70 ⁇ m
- the thickness of the negative electrode layer (per one side of the current collector) was 60 ⁇ m.
- the battery was charged to 4.2 V at a constant current of 2.2 A (1 C) at 25 ° C., and then charged at a constant voltage of 4.2 V for a total of 3 hours under a constant voltage.
- the battery was discharged to a final voltage of 3.0 V under a constant current of 2.2 A (1 C), and the charging and discharging were repeated.
- Initial discharge capacity (mAh) 1M LiPF without formate compound added—ECZPCZMEC (volume ratio 30Z5
- Example 1 Same as Example 1 except that 2-butyne 1,4-diol diformate was used as an additive in 0.5% by weight, 1% by weight, and 5% by weight, respectively, of the non-aqueous electrolyte. Then, a non-aqueous electrolyte was prepared to produce an 18650 size cylindrical battery, and the charge / discharge cycle was repeated. Table 1 shows the results.
- Example 3 was repeated except that LiMn O was used instead of LiCoO as the positive electrode (positive electrode active material).
- the electrode density of the positive electrode was 3.4 gZcm 3
- the electrode density of the negative electrode was 1.4 gZcm 3
- the thickness of the positive electrode layer (per one side of the current collector) was 70 ⁇ m
- the thickness of the negative electrode layer (per one side of the current collector) was 75 ⁇ m.
- the initial discharge capacity (mAh) is 1M LiPF -EC / VC / GBL (capacity not added with formate compound).
- a non-aqueous electrolyte was prepared in the same manner as in Example 16 except that hexyl formate was used as an additive in an amount of 1% by weight based on the non-aqueous electrolyte. The cycle was repeated. Table 2 shows the results.
- a non-aqueous electrolyte was prepared in the same manner as in Example 16 except that octyl formate was used in an amount of 0.1% by weight, 1% by weight, and 5% by weight with respect to the non-aqueous electrolyte, respectively. And a charge / discharge cycle was repeated. Table 2 shows the results.
- a non-aqueous electrolyte was prepared in the same manner as in Example 16 except that decyl formate was used in an amount of 0.5% by weight of the non-aqueous electrolyte as an additive. Discharge The cycle was repeated. Table 2 shows the results.
- a non-aqueous electrolyte was prepared in the same manner as in Example 16 except that no additives were used, and an 18650-size cylindrical battery was manufactured. The charge / discharge cycle was repeated. Table 2 shows the results.
- LiCoO cathode active material
- acetylene black conductive agent
- the battery was provided with a pressure release port and an internal current interrupt device (PTC element).
- the electrode density of the positive electrode was 3.6 gZcm 3
- the electrode density of the negative electrode was 1.7 gZcm 3
- the thickness of the positive electrode layer (per one side of the current collector) was 60 m
- the thickness of the negative electrode layer (per one side of the current collector) was 60 m.
- the battery was charged to 4.2V at a constant current of 2.2A (1C) at room temperature (25 ° C), and then charged at a constant voltage of 4.2V for a total of 3 hours under a constant voltage. Next, the battery was discharged to a final voltage of 2.8 V under a constant current of 2.2 A (1 C), and the charging and discharging were repeated.
- the initial discharge capacity is 1M LiPF -EC / PC / MEC (capacity ratio 30Z5Z65) without adding formic acid
- a non-aqueous electrolyte was prepared in the same manner as in Example 22 except that allyl formate was used at 1% by weight based on the non-aqueous electrolyte as an additive. Was repeated. Table 3 shows the results.
- a non-aqueous electrolyte was prepared in the same manner as in Example 22, except that 1,1 dimethyl-2-propynyl formate was used in an amount of 1% by weight based on the non-aqueous electrolyte. Fabrication and charge / discharge cycles were repeated. Table 3 shows the results.
- LiMn O is used as the positive electrode (positive electrode active material), and 2-propynyl formate is used as an additive.
- Cylindrical batteries of 18650 size was prepared in the same manner as a non-aqueous electrolyte solution of Example 22 was repeated charge and discharge cycles. Table 3 shows the results.
- a non-aqueous electrolyte was prepared in the same manner as in Example 22, except that no additives were used, to produce a cylindrical battery of 18650 size, and the charge / discharge cycle was repeated. Table 3 shows the results.
- a non-aqueous electrolyte was prepared in the same manner as in Example 22, except that 2-propyl acetate was used as an additive in an amount of 1% by weight based on the non-aqueous electrolyte. The discharge cycle was repeated. Table 3 shows the results.
- Example 28 29 LiCo Ni Mn O was used as the positive electrode (positive electrode active material), and formic acid 2-pro
- a non-aqueous electrolyte was prepared in the same manner as in Example 22 except that 1% by weight of peel or 2-butyne 1,4-diol diformate was used, and an 18650 size cylindrical battery was fabricated. Ital was repeated. Table 4 shows the results.
- the lithium secondary battery of the above example has a larger initial capacity and is superior in cycle characteristics as compared with the lithium secondary battery of the comparative example.
- a lithium secondary battery having excellent battery characteristics such as cycle characteristics, electric capacity, and storage characteristics of the battery can be obtained.
- the obtained lithium secondary battery can be suitably used as a cylindrical battery, a prismatic battery, a coin battery, a stacked battery, and the like.
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006511234A JP4899862B2 (ja) | 2004-03-22 | 2005-03-18 | 非水電解液及びそれを用いたリチウム二次電池 |
AT05721110T ATE492921T1 (de) | 2004-03-22 | 2005-03-18 | Nicht-wässrige elektrolytlösung und lithium- sekundärbatterie dieselbe verwendend |
EP05721110A EP1729365B1 (en) | 2004-03-22 | 2005-03-18 | Non-aqueous electrolyte solution and lithium secondary battery using the same |
US10/592,702 US7985502B2 (en) | 2004-03-22 | 2005-03-18 | Nonaqueous electrolyte solution and lithium secondary battery using same |
CA002558290A CA2558290A1 (en) | 2004-03-22 | 2005-03-18 | Nonaqueous electrolyte solution and lithium secondary battery using same |
KR1020067019498A KR101148539B1 (ko) | 2004-03-22 | 2005-03-18 | 비수 전해액 및 이를 이용한 리튬 2차 전지 |
DE602005025457T DE602005025457D1 (de) | 2004-03-22 | 2005-03-18 | Nicht-wässrige elektrolytlösung und lithium-sekundärbatterie dieselbe verwendend |
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JP2004082663 | 2004-03-22 | ||
JP2004-082663 | 2004-03-22 | ||
JP2004-082664 | 2004-03-22 | ||
JP2004082664 | 2004-03-22 |
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WO2005091422A1 true WO2005091422A1 (ja) | 2005-09-29 |
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US (1) | US7985502B2 (ja) |
EP (1) | EP1729365B1 (ja) |
JP (1) | JP4899862B2 (ja) |
KR (1) | KR101148539B1 (ja) |
AT (1) | ATE492921T1 (ja) |
CA (1) | CA2558290A1 (ja) |
DE (1) | DE602005025457D1 (ja) |
TW (1) | TW200601601A (ja) |
WO (1) | WO2005091422A1 (ja) |
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- 2005-03-18 KR KR1020067019498A patent/KR101148539B1/ko not_active IP Right Cessation
- 2005-03-18 AT AT05721110T patent/ATE492921T1/de not_active IP Right Cessation
- 2005-03-18 TW TW094108490A patent/TW200601601A/zh unknown
- 2005-03-18 DE DE602005025457T patent/DE602005025457D1/de active Active
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JP4527605B2 (ja) * | 2004-06-21 | 2010-08-18 | 三星エスディアイ株式会社 | リチウムイオン二次電池用電解液及びこれを含むリチウムイオン二次電池 |
JP2006012806A (ja) * | 2004-06-21 | 2006-01-12 | Samsung Sdi Co Ltd | リチウムイオン二次電池用電解液及びこれを含むリチウムイオン二次電池 |
US9088036B2 (en) * | 2006-12-12 | 2015-07-21 | Samsung Sdi Co., Ltd. | Rechargeable lithium battery |
WO2008102638A1 (ja) * | 2007-02-20 | 2008-08-28 | Sanyo Electric Co., Ltd. | 二次電池用非水電解液及び非水電解液二次電池 |
US8945781B2 (en) | 2007-02-20 | 2015-02-03 | Sanyo Electric Co., Ltd. | Non-aqueous electrolyte for secondary battery and non-aqueous electrolyte secondary battery |
US20140134481A1 (en) * | 2008-02-29 | 2014-05-15 | Mitsubishi Chemical Corporation | Nonaqueous electrolytic solution and nonaqueous-electrolyte battery |
US9083058B2 (en) | 2008-02-29 | 2015-07-14 | Mitsubishi Chemical Corporation | Nonaqueous electrolytic solution and nonaqueous-electrolyte battery |
US8916298B2 (en) | 2008-02-29 | 2014-12-23 | Mitsubishi Chemical Corporation | Nonaqueous electrolytic solution and nonaqueous-electrolyte battery |
JP2009295507A (ja) * | 2008-06-06 | 2009-12-17 | Mitsubishi Chemicals Corp | 非水系電解液及び非水系電解液電池 |
JP2011071098A (ja) * | 2009-08-31 | 2011-04-07 | Mitsubishi Chemicals Corp | 非水系電解液及びそれを用いたリチウム二次電池 |
WO2011025016A1 (ja) * | 2009-08-31 | 2011-03-03 | 三菱化学株式会社 | 非水系電解液及びそれを用いた非水系電解液電池 |
JP2013110102A (ja) * | 2011-10-28 | 2013-06-06 | Fujifilm Corp | 非水二次電池用電解液及び二次電池 |
WO2013061844A1 (ja) * | 2011-10-28 | 2013-05-02 | 富士フイルム株式会社 | 非水二次電池用電解液及び二次電池 |
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KR20160143836A (ko) * | 2014-04-17 | 2016-12-14 | 바스프 에스이 | 리튬계 배터리용 전해질 첨가제로서 알킬벤조에이트 유도체 |
KR102487263B1 (ko) | 2014-04-17 | 2023-01-10 | 고션 인코포레이티드 | 리튬계 배터리용 전해질 첨가제로서 알킬벤조에이트 유도체 |
KR20170012308A (ko) | 2014-05-30 | 2017-02-02 | 우베 고산 가부시키가이샤 | 비수 전해액 및 그것을 사용한 축전 디바이스 |
WO2015182690A1 (ja) * | 2014-05-30 | 2015-12-03 | 宇部興産株式会社 | 非水電解液およびそれを用いた蓄電デバイス |
JPWO2015182690A1 (ja) * | 2014-05-30 | 2017-04-20 | 宇部興産株式会社 | 非水電解液およびそれを用いた蓄電デバイス |
US10164293B2 (en) | 2014-05-30 | 2018-12-25 | Ube Industries, Ltd. | Nonaqueous electrolyte and electricity storing device in which same is used |
KR20230137891A (ko) | 2021-01-29 | 2023-10-05 | 니폰 제온 가부시키가이샤 | 비수계 전기 화학 소자 |
Also Published As
Publication number | Publication date |
---|---|
KR20070004755A (ko) | 2007-01-09 |
EP1729365B1 (en) | 2010-12-22 |
US20080241704A1 (en) | 2008-10-02 |
KR101148539B1 (ko) | 2012-05-25 |
EP1729365A1 (en) | 2006-12-06 |
JPWO2005091422A1 (ja) | 2008-02-07 |
DE602005025457D1 (de) | 2011-02-03 |
CA2558290A1 (en) | 2005-09-29 |
JP4899862B2 (ja) | 2012-03-21 |
ATE492921T1 (de) | 2011-01-15 |
TW200601601A (en) | 2006-01-01 |
US7985502B2 (en) | 2011-07-26 |
EP1729365A4 (en) | 2008-08-20 |
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