WO2004109824A1 - 非水電解質電池 - Google Patents
非水電解質電池 Download PDFInfo
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- WO2004109824A1 WO2004109824A1 PCT/JP2004/003542 JP2004003542W WO2004109824A1 WO 2004109824 A1 WO2004109824 A1 WO 2004109824A1 JP 2004003542 W JP2004003542 W JP 2004003542W WO 2004109824 A1 WO2004109824 A1 WO 2004109824A1
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- battery
- positive electrode
- aqueous electrolyte
- carbon
- carbonate
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M10/056—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
- H01M10/0569—Liquid materials characterised by the solvents
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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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
- H01M6/162—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte
- H01M6/164—Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte by the solvent
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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
- the present invention relates to a non-aqueous electrolyte battery, and particularly to a non-aqueous electrolyte and a positive electrode active material used for a non-aqueous electrolyte battery.
- Non-aqueous electrolyte batteries are attracting attention as small hailfields for electronic expansion, which have been getting more sophisticated and smaller in recent years, because of their high energy density S, and as large-capacity sources for power storage facilities and electric vehicles. Have been.
- a non-aqueous electrolyte battery has a positive electrode made of a lithium oxide complex oxide, a negative electrode made of a lithium metal, a lithium alloy, or a carbonaceous material capable of absorbing and releasing lithium ions, and a non-aqueous electrolyte used as a non-aqueous electrolyte.
- An electrolyte solution in which an electrolyte salt is dissolved is used.
- L i C o 0 2 The tiflB lithium ⁇ genus composite oxide known L i C o 0 2) L i N i 0 2, L i Mn_ ⁇ 2, L i Mn 2 ⁇ 4 Hitoshiryoku S.
- L i C o 0 2 with ⁇ - N a F e 0 2 3 ⁇ 43 ⁇ 4 structure is widely used because it has high energy density Ru.
- - N a F e 0 and have Nitsu lithium manganese two Kkerukobaruto composite oxide having 2 type crystal structure is reported in below non-patent documents 1-3.
- the Mn, Ni, and C0 forces occupying the 6b site of the layered structure represented by the space group R3-m are arranged in a manner similar to that of the superlattice structure. It is thought that the layer formed at the 6b site becomes strong, and that the reaction between oxygen due to lithium extraction is reduced. (Note that, in the description of the space group, a bar "1" should be added above 3 originally, but in this specification, it is described as "R3-m" for convenience. )
- non-aqueous material one in which a water salt is dissolved in a non-aqueous solvent is generally used.
- Lithium hexafluorophosphate (L i PF 6 ) is widely used as the above-mentioned salt, and the non-aqueous solvent is a high dielectric constant solvent such as ethylene carbonate and propylene carbonate.
- Cyclic Estenocarbonate, ⁇ -Ptirolacto Cyclic carboxylate esters, etc. are widely known.
- the non-aqueous solvent generally has a stable oxidation potential on the positive electrode side because of its noble potential, but may have a reduction potential on the negative electrode side because its reduction potential is relatively noble.
- a technique of adding vinylene carbonate or a derivative thereof reduced at a potential about IV noble with respect to the potential of metallic lithium to the non-aqueous material is disclosed in, for example, Patent Documents 1 to 4 described below. Is disclosed.
- a 3 ⁇ 4H odor composed of a product of vinylene carbonate is formed on the negative surface to prevent decomposition of the non-aqueous solvent.
- Non-Patent Document 1 Z. Noto (Z. Lu), DD Macneil (DDMacneil), JR Dern (JRDahn), "Electrochemical and Solid-State Letters" , (USA), 2001, Vol. 4, No. 12, ⁇ . ⁇ 200- ⁇ 203
- Non-Patent Document 2 Koyama (Y. Koyama), Tanaka (L Tanaka), Adachi (H. Adachi), Makimura (Y. Makimu ra), Yabuuchi (Yabuuchi), Kotsuki (T. Ohzuku), "The 42nd Battery Proceedings of Symposium on Discussions ”, (Japan), 2001, ⁇ .50-51
- Non-Patent Document 3 Makimura (Y. Makimura), Yabuuchi (N. Yabuuchi), Kotsuki (T. Ohzuku), Koyama (Y. Koya ma), "The 42nd Battery Symposium Proceedings", (Japan), 2001 year, P .52 ⁇ 53 Patent Document 1: JP-8 _45545 JP
- Patent Document 2 JP-A-11-67266
- Patent Document 3 JP 2001-85059 A
- Patent Document 4 Japanese Patent Application Laid-Open No. 2001-1 26763 Disclosure of the Invention
- the present invention has been made in view of the above problems, and has as its object (object) a non-aqueous material that suppresses the swelling of a battery during high-temperature storage and has excellent battery performance after storage. It is to run the battery.
- object a non-aqueous material that suppresses the swelling of a battery during high-temperature storage and has excellent battery performance after storage. It is to run the battery.
- the present invention has made intensive studies to determine the configuration of the non-aqueous electrolyte and combine it with a positive electrode active material having a specific crystal structure of 5 tonnes. It has been found that the above-mentioned problems are solved.
- the configuration of the present invention is as follows. However, the mechanism of action includes estimation, and the "success or failure" of the mechanism of action does not limit the present invention.
- the present invention provides a non-aqueous electrolyte battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the non-aqueous electrolyte contains at least a cyclic carbonate having a carbon-carbon 71 bond, and the tirtBIE electrode has a composition formula: L l, ab I ⁇ 0. 05, 0 ⁇ c ⁇ l), and includes a positive electrode active material composed of a composite oxide having a Hi-NaFeO 2 3 ⁇ 4 crystal structure. It is a non-aqueous electrolyte battery.
- a non-aqueous m-cell battery comprising a non-aqueous electrolyte comprising a non-aqueous electrolyte containing at least a cyclic carbonate having a carbon-carbon ⁇ bond, comprising a positive electrode active material comprising
- a lithium-ion protective film is formed on the surface of the negative electrode. Since ⁇ of the solvent can be suppressed, gas generation which causes swelling can be suppressed, and battery performance can be improved.
- the cyclic carbonate having a carbon atom-carbon ⁇ is vinylene carbonate, styrene carbonate, teconocarbonate, vinylinoleethylene carbonate, 1-phenylvinylene carbonate, 1,2-diphenylvinyl carbonate. It is preferable to use at least one selected from the group consisting of lencarbonate.
- the first charge is the first charge that is made up of a battery.
- the present invention has been studied on a non-aqueous electrolyte battery using at least a non-aqueous electrolyte containing at least a cyclic carbonate having a carbon-carbon ⁇ bond, and a positive electrode active material used for a positive electrode.
- a positive electrode active material used for a positive electrode by specifying the crystal structure and chemical composition of the positive electrode active material used for the positive electrode, battery swelling, especially when stored at high temperatures, was suppressed, and the battery characteristics after storage were excellent. It has been found that a remarkable effect is exerted.
- the positive electrode active material, shed _N a F e 0 2 has a crystal structure, the use of lithium-manganese-nickel-cobalt composite oxide having a specific chemical fiber, powder charging a battery state
- the even more specific composition range of the lithium-manganese-nickel-cobalt composite oxide having a Iyaonore ⁇ -N a F e 0 2 ® t B 3 ⁇ 4t # granulation the effect of suppressing swelling or capacity reduction of the battery It was found to be more pronounced.
- the oxidation ⁇ position materials that make up the non-aqueous ⁇ quality, in the ethylene carbonate Ya Echirumechiru carbonate which is a high dielectric constant solvent is about 5. 5 V (v. S . L i / L i +) contrast, in the vinylene carbonate is about 4. 5 V (v. s. L i / L i +).
- the L i C o 0 and second potential there is little difference from the potential of the lithium-manganese-nickel co North complex oxide having a a _N a F e 0 2 type crystal structure used in the present invention Ca S study. From this, it is difficult to think that the potential is simply related.
- the negative electrode used for the nonaqueous electrolyte battery of the present invention contains graphite.
- Graphite has a very high potential that is very close to the lithium metal potential (13.045 V vs. NHE at 7K descendants) and can reduce the irreversible capacity in power and charge. Accordingly, it is possible to obtain a nonaqueous electrolyte battery having a high energy density and a high energy density.
- the present invention is a non-aqueous mobile battery characterized in that the non-aqueous electrolyte is a mixture of a lithium salt and an organic lithium salt having a perfluoroalkyl group. . According to such a configuration, high-temperature storage performance can be further improved.
- FIG. 1 is a cross-sectional view of a nonaqueous electrolyte battery according to an example.
- FIG. 2 is a graph showing the high-temperature storage performance (rate of increase in J / L) of a battery according to an example.
- FIG. 3 is a graph showing the high-temperature storage performance (0.2 It recovery capacity fermentation) of a battery according to an example.
- FIG. 4 is a graph showing the high-temperature storage performance (1.0 It recovery capacity retention ratio) of the battery according to the example.
- FIG. 5 is a graph showing the electrochemical characteristics (211 high-rate ⁇ m characteristics) of the battery according to the example.
- 1 is a positive electrode
- 1 is a positive electrode mixture
- 1 is a positive electrode current collector
- 2 is a negative electrode
- 2 is a negative electrode mixture
- 2 is a negative electrode current collector
- 2 is a negative electrode current collector
- 2 is a negative electrode current collector.
- 4 is an electrode group
- 5 is a metal resin composite finolem.
- a non-aqueous solvent generally stored in a non-aqueous electrolyte for a non-aqueous battery can be used.
- cyclic carbonates such as propylene carbonate, ethylene carbonate, butylene carbonate, and chloroethylene carbonate
- cyclic esters ⁇ -petit mouth ratataton, y-valerolatatatone, Piolatatone, etc.
- linear carbonates diimethinolecarbonate, ethynolecarbonate, ethylmethylcarbonate, diphenylcarbonate, etc.
- linear esters methyl acetate, methinobutyrate ⁇
- tetrahydrofuran or its derivatives etherenole Worms (1,3-dioxane, dimethoxyethane, diethoxyethane, methoxyethoxytan, methyldiglyme, etc
- phosphoric esters which are generally flame-retardant solvents that may be used in addition to a non-aqueous electrolyte, can also be used.
- trimethinole phosphate trimethinole phosphate, triethyl phosphate, ethyl dimethyl phosphate, dimethyl methyl phosphate, tripropyl phosphate, triptyl phosphate, tri (trifluoromethyl) phosphate, tri (trifluoroethyl) phosphate, phosphoric acid Examples include, but are not limited to, birds (tripafluoroethyl). These may be used in the insects, or may be used as a mixture of two or more.
- the non-aqueous solvent constituting the non-aqueous electrolyte includes at least one kind of cyclic amide compound having no carbon-carbon ⁇ bond. This is preferred. As a result, even when the amount of the cyclic carbonate having a ⁇ bond, which is abominable, is reduced, the lithium ion-transferable record formed on the negative surface is particularly dense and has a high lithium ion permeability. Therefore, the amount of non-aqueous solvent (excluding a cyclic carbonate having a carbon-carbon ⁇ bond), which is a non-aqueous solvent, can be more effectively suppressed.
- the amount of the carbonate having a carbon-carbon ⁇ bond in the ring and the cyclic amide compound having no carbon-carbon ⁇ bond as a non-aqueous solvent in the entire non-aqueous fluid is determined by 0. 0 1 weight 0 / relative ⁇ S of total of non-aqueous electrolyte. Lay preferred that ⁇ 2 0 weight 0/0, more preferably 0.1 0 weight 0 /. To 1 0 weight 0/0. Non-water! The amount of non-aqueous solvent constituting non-aqueous solvent at the time of the first charge can be almost completely suppressed by setting the amount to 0.01% by weight or more with respect to the amount of ⁇ M of It can be performed more reliably.
- the 2 0 weight 0/0 or less with respect to ⁇ fi amount of the nonaqueous transliteration quality no ⁇ carbon one-carbon ⁇ as cyclic carbonate and a nonaqueous solvent having a carbon one-carbon ⁇ bond cyclic Since the ⁇ on the positive electrode side of the compound such as ⁇ ⁇ can be minimized, sufficient battery performance is obtained.
- a non-aqueous battery can be used.
- the content ratio of the cyclic carbonate having a self-carbon-to-carbon total of ⁇ and the cyclic carbonate having no carbon-to-carbon-carbon bond can be arbitrarily selected.
- a cyclic compound having no carbon-carbon ⁇ bond from among cyclic carbonates having a high dielectric constant and not having a carbon-carbon ⁇ bond, among which, It is preferable to use at least one selected from the group consisting of ethylene carbonate, propylene carbonate and butylene carbonate.
- an electrolyte salt which is generally used in a nonaqueous electrolyte battery and is stable in a wide potential range can be suitably used.
- L i BF 4 L i PF 6, L i C 10 4> L i CF 3 S0 3, L i N (CF 3 S0 2) 2, L i N (C 2 F 5 S0 2) 2 , L i N (CF 3 S 0 2 ) (C 4 F 9 S 0 2 ), L i C (CF 3 S 0 2 ) 3 , L i C (C 2 F 5 S o 2 ) 3
- L i BF 4 L i PF 6, L i C 10 4> L i CF 3 S0 3, L i N (CF 3 S0 2) 2, L i N (C 2 F 5 S0 2) 2 , L i N (CF 3 S 0 2 ) (C 4 F 9 S 0 2 ), L i C (CF 3 S 0 2 ) 3 , L i C (C 2 F 5 S o 2 ) 3
- L i C (CF 3 S 0 2 ) 3 L i C (C 2 F 5 S o 2 ) 3
- PA Full O b alkyl such L i PF 6 and inorganic lithium ⁇ beam salts such as or L i BF 4, L i N (CF 3 S0 2) 2 and L i N (C 2 F 5 S0 2) 2 It is more preferable to use a mixture with an organic lithium salt having a group, because not only the viscosity of the non-aqueous conversion can be kept low, but also the effect of improving the high-temperature storage performance can be obtained.
- the concentration of the electrolyte salt in the non-aqueous electrolyte is preferably 0.1 lm 0 l / l to 5 mol / l, more preferably lraol /, in order to reliably obtain a non-aqueous electrolyte battery having high battery characteristics. It is 1 to 2.5 mol / l. Ore to L i- Mn- N i- C o based composite oxide having a ⁇ -N a F e 0 2 crystals Ne ⁇ used as the positive electrode active material Te, Personal Protection for First Aid or Rescue Personnel ratio of Mn and N i is approximately 1: Les, preferably with one.
- a tiff self-condensed sardine is subject to ⁇ depending on the »nature of the precursor. At this time, if the amount of Mn is too large with respect to the amount of Ni, L i 2 generates Mn_ ⁇ 3 etc. and become easier, composite oxide to be formed is to lose uniformity.
- elements of the 6b site such as Mn, Ni, and Co in the composite oxide may be partially substituted with the difficult element M. That is, here, the different element M is Mn, Ni, Co,
- the element be at least one of the l to l6 groups excluding L i and o, and be an element that can replace the element at the tirm6b site.
- the use of any of V, Al, Mg, Cr, Ti, Cu, and Zn is particularly preferable because a particularly remarkable effect can be obtained on high-rate performance.
- the L i -Mn-N i -Co-based composite oxide according to the present invention has an elemental force within the 6 b site S that is uniformly mixed and diffused.
- the knitted precursor As a composite hydroxide or a composite carbonate. Above all, it is more preferable to obtain the compound hydroxide as a composite hydroxide because the conditions are simple and the control of the secondary particle morphology is easy.
- a preferred form of the precursor which can be used for the Li-Mn-Ni-Co-based composite oxide according to the present invention and a method for producing the precursor will be described.
- the knitting precursor is preferably a compound in which Mn atoms and, if necessary, Co atoms are arranged uniformly with Ni atoms at Ni sites in a Ni (OH) 2- type skirt crystal structure.
- the valence of the Mn atom constituting the precursor crystal is preferably divalent.
- Te is electrochemically inert materials, although there is work to stabilize the crystal structure of the composite oxide becomes a factor of lowering capacity Therefore, because it is preferable to do too much content of L i 2 Mn 0 3 contained in the composite oxide (positive electrode active material).
- the method of preparing the tiit precursor is not particularly limited as long as it satisfies the above-mentioned conditions.
- a “coprecipitation method” may be employed in which a drop of water containing at least Ni and Mn is dropped at night to form a precipitate. The precursor is obtained by drying the product obtained in the “coprecipitation method”. By adopting the “coprecipitation method”, it is easy to obtain a complex oxide that is the desired final product with high crystal structure stability due to the desorption / insertion of i, especially high battery performance. Can be produced.
- the pH of the anti-j3 ⁇ 4 night should be kept at an alkalinity of 11 or more. S is important. If the pH of the reaction solution is too high, the generation speed S of the Nada product becomes too high, and the density of the precursor tends to decrease. In this respect, the anti-night pH is preferably 13 or less, more preferably 12 or less. Second, it is extremely important to maintain a reducing atmosphere during the night. Under the above conditions, the valency of Mn is kept divalent, and the precursor obtained by drying the resulting product becomes a crystal mainly containing a ⁇ - ⁇ i (OH) 2 type structure.
- Hiichi N i (OH) It contains many type 2 structures.
- oxygen can be removed by filling the inside of the reaction vessel with Ab or a reducing agent such as hydrazine with an inert gas at the reaction time, and the reaction system can be made a reducing atmosphere.
- the precursor material of the precursor there is no particular limitation as long as it forms a reaction with an aqueous alkali solution, but a metal salt having a high solubility in water can be used. Is preferred.
- Highly soluble metal salts include Mn compounds such as manganese oxide, manganese carbonate, manganese sulfate, and manganese nitrate.
- Ni compounds include nickel hydroxide, nickel carbonate, nickel sulfate, and nickel nitrate. Examples of the compound include konoleto sulfate and cobalt nitrate.
- anti-ammonia ions be allowed to be released during the anti-S night.
- the presence of an ammonium ion mitigates the S precipitation ⁇ by passing through the metal-amine complex formation reaction, resulting in good crystal orientation, uniform composition, and secondary particle shape. Can be generated.
- the amount of ammonium ions in the reaction solution was excessively increased with respect to the amount of Mn, Ni, and Co in the reaction solution and the amount of metal ions derived from the raw materials. Generating and growing the growth nuclei is preferable because a very homogeneous and bulky precipitate is produced.
- ammonium sulfate for example, ammonium sulfate, aqueous ammonia or the like may be injected into the liquid system.
- the key metal ion rapidly precipitates due to the acid-base reaction, resulting in no crystal orientation, resulting in a non-uniform particle shape and non-uniform particle internal composition. A precipitate tends to form.
- the composite oxide has Mn and Ni as elements of the genus group.] — N i ( ⁇ H) 2
- the precursor comprising the Co compound is preferably an oxide or a carbonate salt.
- Co oxides include conolate monoxide, oxyhydroxide hydroxide, and cobalt tetroxide
- Co carbonate salts include basic cobalt carbonate.
- the precursor may be formed by coating a Co compound exemplified below with a compound of Mn and Ni. That is, Mn and Ni can be contained in the suspension of the Co compound by dropping firewood night to uniformly precipitate Mn-Ni precipitates.
- the C ⁇ compound is not particularly limited as long as it has low solubility, but preferably, it is a metal oxide ( ⁇ ), a metal hydroxide oxide ( ⁇ ), a nicotoxide tetroxide ( ⁇ ), cobalt ( ⁇ ), 7-conoxide ( ⁇ ) and the like may be used.
- the atmosphere inside the system must be a one-element atmosphere in order to suppress the increase in the valence of Mn.
- the presence of ammonium ion is necessary in some cases, but it may not be necessary depending on the conditions because the Co compound already exists. .
- the mixing of the precursor and the Li compound it is possible to use a method of mixing each powder in a positive manner.
- the mixing ratio [L i: (Mn + N i + Co)] requires a predetermined molar amount according to the desired composition. However, if the Li compound is a little ii3 ⁇ 4, the loss of Li due to destruction is reduced. It is preferable because the desired stoichiometry can be obtained by offsetting.
- the atomic ratio of the nematic oxide after the treatment [L i / (Mn + N i + Co)] is less than 1.35, more preferably less than 1.2, most preferably less than 1.10, and 0 If it exceeds 95, it can be used as a positive electrode active material for a lithium secondary battery having a high energy density, a high recharge rate, and a charge cycle performance. If the Fujimi ratio is 1.35 or more, there is a high possibility that excess Li compound will burn on the surface of the active material, resulting in a decrease in fuel capacity. If the disgust is 0.95 or less, structural changes occur, such as the occurrence of oxygen deficiency to compensate for the lack of charge, which may hinder Li movement and significantly reduce battery performance. There is.
- the temperature of the heat treatment is preferably from 900 ° C to 1050 ° C, more preferably from 950 ° C to 1025 ° C. If the search temperature is lower than 900 ° C, structural factors hinder the movement of L i A problem that the electric capacity is reduced occurs. On the other hand, synthesis is possible even if the heat treatment exceeds 150 ° C, but if the heat treatment exceeds 150 ° C, the density of particles will increase and the battery performance S will decrease. Also, since Li is easily volatilized during the heat treatment, a problem such as difficulty in obtaining a composite oxide having a desired composition is likely to occur.
- the crystal structure tends to decrease the pond performance because atoms are excessively generated between the ttff 6a site and the 6b site.
- the temperature within the range of 900 ° C. or more and 105 ° C. or less (preferably 950 ° C. or more and 105 ° C. or less), particularly high energy This is preferable because a positive electrode active material for a lithium secondary battery having a high density and excellent charge / cycle performance can be synthesized.
- the heat treatment time is preferably 3 hours or more and 50 hours or less. If the heat treatment time exceeds 50 hours, Li tends to volatilize during the heat treatment, so that it is difficult to obtain a composite oxide having a desired composition, and the battery performance tends to substantially deteriorate. On the other hand, if the heat treatment time is less than 3 hours, the crystal growth may be poor and the battery performance may be poor.
- the heat treatment atmosphere is preferably an atmosphere containing oxygen.
- the atmosphere containing oxygen is preferably air
- the materials used for the negative electrode of the nonaqueous electrolyte battery according to the present invention include carbonaceous materials, metal oxides (tin iodide, silicon oxide, etc.),
- fS is a material which has been modified by adding phosphorus and boron to these materials in order to improve the negative electrode properties; among graphite materials, graphite has a potential very close to that of metallic lithium.
- Lithium salt is used as the electrolyte salt, so that the self-direction can be reduced, and the irreversible capacity in charge and discharge can be reduced.
- the analysis results of X-ray diffraction and the like of the graphite that can be suitably used are shown below;
- the means for producing the nonaqueous electrolyte battery according to the present invention is not particularly limited.
- a power generating element composed of a positive electrode, a negative electrode, and a separator may be used as an electric package composed of 1 ⁇ 2t.
- a method of injecting liquid non-aqueous material into an electric package and finally sealing it may be used.
- a positive electrode, a negative electrode The separator and the separator are stored in the respective storage sections of the battery package having the positive electrode storage section, the negative electrode storage section, and the separator storage section. A method in which an electrolyte is injected and finally sealed may be used.
- the Kyokai 3IE electrode and the negative electrode are preferably produced using, in addition to the main component, the knitting active material, a derivative U and an adhesive.
- the IJ is not limited as long as it is an electron conductive material that does not adversely affect the battery characteristics.
- natural graphite scale graphite, flake graphite, earth graphite, etc.
- artificial graphite carbon black, acetylene Black or Ketjen Black, carbon whiskers, carbon fiber, metal powder (powder of copper, nickel, aluminum, silver, gold, etc.), metal powder, conductive ceramic material, etc.
- metal powder powder of copper, nickel, aluminum, silver, gold, etc.
- conductive ceramic material etc.
- acetylene black is preferred as the conductive agent from the viewpoint of conductive '14 coatability.
- the addition amount of the conductive agent 1% to 5 0 by weight 0/0 force transducer Mashiku relative to the total weight of the positive electrode or the negative electrode, in particular, 2% to 3 0% by weight.
- These mixing methods are physical mixing, and the ideal is homogeneous mixing. For this reason, powder mixers such as V-type mixers, S-type mixers, grinders, ball mills, and planetary Ponole mills are dried. 04 003542
- At least the surface layer of the powder of the positive electrode active material and the powder of the negative electrode active material can be made of a material having good electron conductivity or ion conductivity, or a compound having a hydrophobic group.
- substances with good electron conductivity such as gold, silver, carbon, nickel, and copper
- substances with good ion conductivity such as lithium carbonate, boron glass, and solid-state conversion
- the coating can be applied by applying techniques such as plating,
- the powder of the positive electrode active material and the powder of the negative electrode active material preferably have an average particle size of 100 m or less.
- the powder of the positive electrode active material is desirably 10 ⁇ or less for the purpose of improving the high output characteristics of the nonaqueous conversion battery.
- a pulverizer or a grinder is used. For example, mortar, Beaune mill, sand mill, vibrating ball mill, planetary pole mill, jet mill, counter jet mill, swirling air jet type jet mining sieve, etc. are used.
- wet or pulverization with water or an organic solvent such as hexane may be used.
- the splitting method is not particularly limited, and a sieve or an air classifier is used as needed in both the dry type and the wet type.
- the binders are usually thermoplastic resins such as polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, and polypropylene; ethylene-propylene diene terpolymer (EPDM); sulfonated EPDM; styrene butadiene rubber. (SBR), polymers having rubber elasticity such as fluororubber, and polysaccharides such as carboxymethinolulose can be used as one kind or as a mixture of two or more kinds.
- thermoplastic resins such as polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, and polypropylene; ethylene-propylene diene terpolymer (EPDM); sulfonated EPDM; styrene butadiene rubber. (SBR), polymers having rubber elasticity such as fluor
- a binder having a functional group that is compatible with lithium such as a polysaccharide
- the functional group may be deactivated by methylation. Desired Ray.
- the amount of the binder added is preferably 1% by weight to 50% by weight, and more preferably 2% by weight to 30% by weight, based on the total weight of the positive electrode or the negative electrode. Is preferred.
- Positive or negative electrode active material, negative electrode active material, conductive agent and I-adhesive are added to an organic solvent such as toluene or water and formed into an electrode shape. Can be suitably prepared.
- the positive electrode is in close contact with the positive electrode current collector and the negative electrode is in close contact with the negative electrode current collector.
- the positive electrode current collector include aluminum, titanium, and stainless steel.
- nickel, calcined carbon, conductive polymer, conductive glass, etc. the surface of aluminum, copper, etc. is coated with carbon, nickel, titanium, etc. for the purpose of improving adhesiveness and conductive oxidation.
- a material treated with silver or the like can be used.
- Current collectors for negative electrodes include copper, nickel, iron, stainless steel, titanium, aluminum, carbon dioxide, conductive polymers, conductive glass, and Al-Cd alloys, as well as adhesive and conductive materials.
- a material obtained by treating the surface of copper or the like with carbon, nickel, titanium or the like can be used.
- the surface of these materials can be oxidized.
- Regarding the shape of the current collector besides oil, film, sheet, net, and nodule.
- the thickness is not particularly limited, but a thickness of 1 to 500 / m is used.
- aluminum foil is excellent in oxidation resistance as a current collector for a positive electrode, and aluminum foil is stable in a reduction field and excellent in conductivity as a current collector for a negative electrode.
- the foil has a rough surface roughness of 0.2 / z niRa or more, whereby the adhesion between the positive electrode and the negative electrode and the current collector becomes excellent. Therefore, it is preferable to use a comfort foil because of having such a rough surface. In particular, S-foil that has been subjected to a napping treatment is most preferable.
- a separator for a non-aqueous electrolyte battery it is preferable to use a porous membrane / nonwoven fabric exhibiting excellent rate characteristics.
- Examples of a material constituting the separator for a non-aqueous battery include a polyolefin resin represented by polyethylene, polypropylene, etc .; a polyester resin represented by polyethylene terephthalate, polybutylene terephthalate; polyvinylidene fluoride; Vinylidene fluoride-hexafluoropropylene copolymer, vinylidene fluoride-perfluorovinyl ether copolymer, vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-trifluorofluorene ethylene copolymer Copolymer Copolymer, vinylidene fluoride-phenolic ethylene copolymer, vinylidene fluoride-hexafluoroacetone copolymer, vinylidene fluoride-ethylene copolymer, vinylidene fluoride-propylene copolymer, Vinylidene fluoride-trifluoropropylene
- the porosity of the separator for a non-aqueous electrolyte battery is preferably 98% by volume or less from the viewpoint of strength. Further, the porosity is preferably 20% by volume or more from the viewpoint of charge / discharge characteristics.
- the non-aqueous electrophoretic separator is, for example, a polymer gel composed of a polymer such as acrylonitrile, ethylene oxide, propylene oxide, methyl methacrylate, vinyl acetate, vinyl vinylidone, polyvinylidene fluoride, and an electrolytic solution. May be used.
- the separator for a non-aqueous electrolyte battery is desirably used in combination with the above-described porous membrane / nonwoven fabric and a polymer gel since the liquid retaining property of the electrolytic solution is improved. That is, a film in which a solvent-philic polymer having a thickness of a few meters or less is covered with a film is formed on the surface and the wall surface of the polyethylene pore-forming membrane, and the liquid is retained in the pores of the film. However, this lipophilic polymer gels.
- the upper word 3 ⁇ 4 solvent soluble polymers, other polyvinylidene mold two alkylidene, Atari rate monomers having Echirenokishido group or Esutenore group include epoxy monomers, monomers force having Isoshianeto group S crosslinked polymers such force s .
- crosslinking heat, actinic rays such as ultraviolet rays (UV) and electron beams (EB) can be used.
- the above-mentioned soluble polymer does not disturb the formation of the crosslinked product.
- the physical properties U include inorganic fillers (silicon oxide, titanium oxide, anolymium oxide, magnesium oxide, zirconium oxide, oxide oxide, metal oxides such as iron oxide, calcium carbonate, and magnesium carbonate). Metal carbonates such as shim; and polymers (polyvinylidene fluoride, vinylidene fluoride Z hexafluoropropylene copolymer, polyacrylonitrile, polymethyl methacrylate, etc.).
- the mouth weight is usually 50% by weight or less, preferably 20% by weight / 0 or less, based on the crosslinkable monomer.
- Preferred examples of the acrylate monomer include bifunctional or higher unsaturated monomeric power S. More specifically, bifunctional (meth) acrylates [ethylene glycol di (meth) acrylate, propylene glycol (Meth) acrylate, adipic acid Dineo Recohol ester di (meth) acrylate, polyethylene glycol with a degree of polymerization of 2 or more Poly (meth) acrylate, polypropylene with a degree of polymerization of 2 or more dalicol di (meth) acrylate, di (meth) polyoxyethylene / polyoxypropylene copolymer ) Acrylates, butanediol di (meth) acrylate, hexamethylene glycol di (meth) acrylate, etc.), trifunctional (meth) acrylates [trimethylolprono.
- a monofunctional monomer may be added to the tirt acrylate monomer for the purpose of adjusting physical properties and the like.
- the monofunctional monomers include unsaturated carboxylic acids [atalino, methacrylo VI, crotonic acid, cinnamic acid, binino!
- Benzoic acid maleic acid, fumano, itaconic acid, citraconic acid, mesaconic acid, Methylenemalonic acid, aconitic acid, etc.), unsaturated sulfonic acid [styrenesnolephonic acid, acrylamide-2-methylpropanesulfonic acid, etc.], or their salts [Li salt, Na salt, K salt, ammonium salt] , Tetraalkylammonium salts, etc.].
- the above unsaturated carboxylic acids are partially substituted with C 1 -C 18 aliphatic or alicyclic alcohols, alkylene (C 2 -C 4) glycols, polyalkylene (C 2 -C 4) glycols or the like.
- dalicidinooleatenes bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, brominated bisphenol A diglycidyl ether, phenol monophenol polylacid glycidinole ether, Cresono renopolak glycidyl etheno ⁇ ], glycidyl esters [hexahydrophthalazo glycidinole ester, glycidyl esteno dimer], glycidylamines [triglycidyl isocyanurate, tetradaricidinoresinaminophenyl] Methane, etc.), linear aliphatic epoxides [epoxidized polybutadiene, epoxidized soybean oil, etc.], alicyclic epoxides [3,4 epoxy-16 methinoresic mouth hexylmethinorecanoleboxylate, 3,
- curing agent examples include fatty acid male polyamines [diethylenetriamine, triethylenetetramine, 3,9- (3-aminopropyl) -2,4,8,10-tetrooxaspiro [5,5] didecane, etc.] Aromatic polyamines (meta-xylene diamine, diamino pheninolemethane, etc.), polyamides (dimer polyamide, etc.), water hydrates (phthalic anhydride, tetrahydromethino water phthalenoic acid, hexahydrophthalanoic anhydride, Anhydrous trim Ritic acid, methylnadic anhydride, etc.), phenols [phenol nopolak, etc.], polymenolecabbutane [polysanolefide, etc.], tertiary amines [tris (dimethinoleaminomethyl) phenol, 2-ethynoleic 4-methyl Imidazono], a noreic acid complex
- Illustrative examples of the monomer having a self-isosocyanate group include: tonorendiisocyanate, dipheninolemethanediisocyanate, 1,6-hexamethylenediisocyanate, 2,2,4 (2,2 , 4) -trimethinolehexamethylene diisocyanate, p-phenylenediisocyanate, 4, 4'-dicyclohexynolemethane diisocyanate, 3, 3, dimethinoresiphenyl 4, 4 ' Diisocyanate, dianisidine diiso
- polyols and polyamines [bifunctional compounds ⁇ water, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, etc. ⁇ , trifunctional compounds ⁇ glycerin, trimethylolpropane , 1,2,61-hexanetriol, triethanolanolamine, etc. ⁇ , tetrafunctional compound ⁇ pentaerythritol, ethylenediamine, tolylenediamine, diphenylmethanediamine, tetramethylonorecyclohexane, methyldarcoside, etc. ⁇ , 5 functional compounds ⁇ 2,2,6,6-tetrakis (hydroxymethyl) cyclohexanol, methyltriamine, etc. ⁇ , 6-functional compounds ⁇ sorbitol, mannitol, dulcitono ⁇ , 8 government compound g compounds ⁇ sucrose, etc. ⁇ ], Polyate Polyols [produced propylene oxide and
- a catalyst in the crosslinking, can be used in combination.
- the corner butterfly include organotin compounds, trialkylphosphines, amines [monoamines ⁇ N, N-diamine Methylcyclohexylamine, triethynoleamine, etc. ⁇ , cyclic monoamide pyridine,
- N-methylmorpholine etc. ⁇ diamines ⁇ N, N, N ', N'-tetramethinoleethylene diamine, N, N, N', N'-tetramethinole 1,3-butanediamine etc. ⁇ , triamines ⁇ N , N, N,, N '—pentamethylmethylentriamine, etc. ⁇ , hexamines ⁇ N, N, N, N, tetra (3-dimethylaminopropyl) -methanediamine, etc.), cyclic polyamidazabicyclo Octane (DAB CO), N, N, dimethinoleviperazine, 1,2-dimethinoleimidazole, 1,8-diazabicyclo (5,4,0) ⁇ decene-17 (DBU) ⁇ ], and And salts thereof.
- DBU CO cyclic polyamidazabicyclo Octane
- the liquid is injected before or after laminating the non-aqueous electrolyte electro-magnetic separator, the positive electrode, and the negative electrode, and finally, the liquid is mixed with a liquid material. By doing so, it is preferred. Further, in a non-aqueous electrolyte battery in which a positive electrode and a negative electrode are wound around a power generating element laminated via a separator for a non-aqueous electrolyte battery, the electrolytic solution is applied before and after the winding. It is preferable that the liquid is injected into the liquid. As the injection method, it is possible to inject at normal pressure, but a vacuum impregnation method and a pressure impregnation method can also be used.
- a thin material is preferable from the viewpoint of reducing the weight of the non-aqueous dry cell battery.
- a metal-resin composite material having a structure in which a metal foil is sandwiched between resin films is preferable.
- the actual metal foil include aluminum, iron, nickel, stainless steel, titanium, gold, silver, and other foils having no pinholes.
- lightweight and inexpensive aluminum foil is preferable.
- the resin film on the electrode side is a resin film having excellent piercing strength such as a polyethylene terephthalate film or a nylon film
- the resin film on the battery inner side is a resin film such as a polyethylene film or a nylon film.
- metal battery case cans with higher sealing reliability.
- the raw material liquid was adjusted at normal temperature (20 ° C).
- the raw material liquid used in this example had a manganese concentration of 0.58 Omo 1 / L, a nickel concentration of 0.58 Omo 1 / L, a konoleto concentration of 0.58 Omo 1ZL, and a hydrazine concentration of 0.0101 mo.
- a slurry of the coprecipitated product was collected 60 hours after the start of the dropping of the raw material liquid and within 5 hours.
- the collected slurry was washed with water, filtered, and dried at 100 ° C for one hour to obtain a powder of Ni-Mn-Co coprecipitated precursor.
- the N i -Mn-Co coprecipitated precursor mainly contained a ⁇ - ⁇ i (OH) 2 type crystal structure.
- the material is referred to as “positive electrode active material A”.
- the manganese concentration was 0.28 lmo 1 / L
- the nickel concentration was 0.281 mol / L
- the concent concentration was 1.179 mol / L
- the hydrazine concentration was 0.0101 mol 1 ZL.
- L i -Mn-N i- C o composite oxide obtained is, alpha belonging to the space group R 3 _m - N a F e 0 2 structure was mainly.
- Result of ICP composition analysis L i Mn 0. 16 N i 0. 16 C ⁇ 0.
- the 67 Omicron 2 composition was 3 ⁇ 4H Shinobu.
- This Li-Mn-Ni-Co composite oxide is referred to as "cathode active material B".
- manganese sulfate manganese sulfate (0.14 lmo 1 ZL), nickel concentration 0.14 mol / L, cobalt concentration 1.478 mol ZL, hydrazine concentration 0.0101 mol 1 / L MnS_ ⁇ 4) water 'Nada, nickel sulfate (N i S0 4) water? Gakuyoru, sulfate Kono belt (C o S 0 4) 7j deer night and hydrazine (NH 2 NH 2) 7j ⁇ by mixing sickle obtained
- a Li-Mn-Ni-Co composite oxide was obtained in the same manner as described above, except that the above-mentioned compound was used.
- FIG. 1 is a cross-sectional view of the nonaqueous electrolyte battery according to the present embodiment.
- the nonaqueous electrolyte battery according to the present embodiment has a positive electrode 1 in which a positive electrode mixture 11 is disposed on a positive electrode current collector 12, a negative electrode mixture 2 1 force S negative;
- the electrode group 4 includes a negative electrode 2 and a separator 3, a non-aqueous electrolyte, and a metal resin composite film 5 as a polymer. Non-water quality is impregnated in Ueto group 4.
- the metal-resin composite film 5 covers the electrode group 4, and the four sides are sealed by heat welding.
- the positive electrode 1 is obtained by mixing the positive electrode active material with acetylene black, which is a conductive material, and further mixing N-methyl-2-pyrrolidine firewood of polyvinylidene fluoride as a binder. After being formed on one side of the positive electrode body 12 made of, it was dried and pressed. Through the above steps, a positive electrode 1 in which the positive electrode mixture 11 was disposed on the positive electrode 12 was obtained. Note that the thickness of the positive electrode mixture is appropriately increased or decreased according to the design capacity of the battery.
- Negative electrode 2 is a mixture of graphite, which is the negative electrode active material, and N-methyl-2-pyrrolid of polyvinylidene fluoride, which is a binder, and applies this mixture to one surface of a negative electrode 22 made of copper foil. After drying, it was pressed. Through the above steps, a negative electrode 2 in which the negative electrode mixture 21 was placed 3 on the negative electrode 22 was obtained. The thickness of the negative electrode mixture 21 is appropriately increased or decreased according to the design capacity of the battery.
- Separator 3 is made of polytetrafluoroethylene perforated membrane (average pore diameter: 0.1 / zm, leaching rate: 50%, thickness: 23 ⁇ , weight: 12.5 2 g / m ⁇ Fujitsu 89 seconds / 100 ml) was used.
- the electrode group 4 was configured by opposing the tiffSE electrode mixture 11 and the # 3 negative electrode mixture 21, and arranging and separating the separator 3 between them.
- Nonaqueous Koboshihayashitsu is Echirenkabo sulfonates ⁇ Pi GETS chill carbonate machine ratio 5: 5 mixed solvent 1 liter in a mixing ratio of, dissolved 1 mole of L i PF 6, further 2 weight vinylene force Poneto %.
- the electrode group 4 was impregnated with the nonaqueous electrolyte by immersing the electrode group 4 in the nonaqueous electrolyte.
- the electrode group 4 was covered with the metal-resin composite film 5, and the four sides were sealed by heat welding.
- the nonaqueous electrolyte battery according to the present example obtained by the above manufacturing method was manufactured.
- a non-aqueous electrolyte battery having a nominal amount of 600 mAh was obtained by the above procedure using the above method. This Is referred to as “battery 2 of the present invention”.
- ethylene carbonate ⁇ Pi GETS chill carbonate f machine ratio 5 5 harm if in mixed solvent mixture 1 liters, L i PF 6 and L i N (CF 3 S 0 2) 2 and the 9
- a nonaqueous electrolyte battery having a nominal capacity of 60 O mAh was prepared in the same manner as the battery 1 of the present invention, using Li Mn 2 ⁇ 4 having a spinel skirt structure as the positive electrode active material. This is referred to as “Comparative Battery 1”.
- non-aqueous electrolyte a volume of ethylene carbonate ⁇ Pi Jefferies chill carbonate ratio of 5: 5 mixture 1 liter of the solvent in a mixing ratio of, in dissolving 1 mole of L i PF 6
- a non-aqueous electrolyte battery having a nominal solubility of 600 mAh was used in the same manner as Battery 1 of the present invention, except that vinylene carbonate was not mixed. This is referred to as “comparative battery 3_].
- the charge was a constant current constant charge with a current of 600 mA and a final voltage of 4.2 V, and the charge was 600 mA (l. 0 It) with a constant current of 3.0 V and a constant current of 3.0 V.
- the furnace capacity in the third cycle at this time was defined as “1.0 It initial quantity ( ⁇ 1 ⁇ )”.
- the battery was charged by constant current and constant voltage charging at a current of 600 mA and a final voltage of 4.2 V, and the voltage was measured. This was referred to as “before storage (mm)”.
- the present invention using using aqueous ⁇ containing a cyclic carbonate having a carbon-one-carbon% bond, a complex oxide having an NaFe0 2 type crystal structure shed the positive electrode active material
- the value of the I1.0 It recovery capacity ft maintenance rate of the 0.2 It recovery capacity ⁇ is given by the formula: L x Mn a Ni b C in o c 0 2 shown in relation to the value of c.
- the Figure 3 and in Figure 4 for the L i Mn 2 0 4 of Comparative Example 1 was in use in the positive electrode active material value having a spinel crystal structure, for comparison, shown in broken lines.
- Battery of the present invention 1 3.2 3.3 3.3 3.3 3.4
- Battery of the present invention 2 3.2 3.2 3.3 3.3 3.5
- Battery of the present invention 3 3.3 3.3 3.4 3.4 3.5
- the battery thickness of comparative battery 1 before storage was about 4 mm, compared to that of other batteries of about 3.2 to 3.4 mm. Thick. This is because the theoretical energy density of the L i Mn 2 0 4 with a spinel Le type binding B ⁇ structure used in the positive electrode active material is low, for adjusting the nominal soluble amount of the battery 6 0 O mA h, the positive electrode This is because agent 11 was thickly arranged.
- a positive electrode active material composed of a complex acid oxide having a structure.
- the effect of suppressing the swelling of the battery during high-temperature storage is significantly affected not only by the presence or absence of a cyclic carbonate having a carbon-carbon ⁇ bond in non-aqueous materials, but also by the type of positive electrode active material. It is understood that it receives.
- it has an alpha-NaFe_ ⁇ 2 crystal structure, composition formula: L i J: n a N i b C o c 0 Among 2 lithium Qian ⁇ genus composite oxide represented by a c rather 1, I It can be seen that by setting ab I ⁇ 0.05, the effect of suppressing battery swelling during high-temperature storage is extremely remarkably exhibited.
- the composite oxide which does not contain the difficult element ⁇ which has been subjected to SiflB is used as the positive electrode active material, but the composition formula is: Li x Mn a Ni b C o c In M d 0 2 , M is selected from V, Al, Mg, Cr, Ti, Cu, and Zn, and a composite oxide having a range of d ⁇ O.1 is used as a positive electrode active material. The same effect is used in. ⁇ , Which is used as the ⁇ .
- the non-aqueous conversion battery of the present invention has excellent storage performance in a high-temperature environment, it can be easily applied to a large-capacity large-capacity battery used for electric power storage, electric vehicles, and the like.
- the present invention can be embodied in various other forms without departing from its spirit or main characteristics. Therefore, the above-described embodiments or examples are merely examples in every respect and should not be construed as limiting.
- the scope of the present invention is defined by the claims, and is not restricted by the specification text. Furthermore, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention. Industrial applicability
- ⁇ According to the invention, a non-aqueous electrolyte battery which suppresses battery swelling during high-temperature storage and has excellent battery characteristics after storage can be obtained.
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Abstract
Description
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US6821677B2 (en) * | 2001-03-29 | 2004-11-23 | Kabushiki Kaisha Toshiba | Negative electrode active material and nonaqueous electrolyte battery |
US7393476B2 (en) * | 2001-11-22 | 2008-07-01 | Gs Yuasa Corporation | Positive electrode active material for lithium secondary cell and lithium secondary cell |
-
2004
- 2004-03-17 KR KR1020057023067A patent/KR100739921B1/ko active IP Right Grant
- 2004-03-17 CN CN2004800154004A patent/CN1799157B/zh not_active Expired - Fee Related
- 2004-03-17 WO PCT/JP2004/003542 patent/WO2004109824A1/ja active Application Filing
- 2004-03-17 US US10/558,887 patent/US20060257743A1/en not_active Abandoned
Patent Citations (6)
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JPH08213015A (ja) * | 1995-01-31 | 1996-08-20 | Sony Corp | リチウム二次電池用正極活物質及びリチウム二次電池 |
JPH10199525A (ja) * | 1997-01-16 | 1998-07-31 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
JPH1125957A (ja) * | 1997-05-08 | 1999-01-29 | Sanyo Electric Co Ltd | 非水電解質二次電池及び正極材料の製造方法 |
JP2002304993A (ja) * | 2001-04-04 | 2002-10-18 | Yuasa Corp | 正極活物質及びその製造方法並びにそれを用いた二次電池 |
JP2003068360A (ja) * | 2001-08-29 | 2003-03-07 | Mitsubishi Cable Ind Ltd | リチウム二次電池 |
JP2003168477A (ja) * | 2001-11-29 | 2003-06-13 | Yuasa Corp | 非水電解質電池 |
Also Published As
Publication number | Publication date |
---|---|
KR20060024786A (ko) | 2006-03-17 |
US20060257743A1 (en) | 2006-11-16 |
KR100739921B1 (ko) | 2007-07-16 |
CN1799157B (zh) | 2010-05-05 |
CN1799157A (zh) | 2006-07-05 |
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