WO2005119706A1 - 高性能全固体リチウム電池 - Google Patents
高性能全固体リチウム電池 Download PDFInfo
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- WO2005119706A1 WO2005119706A1 PCT/JP2005/010134 JP2005010134W WO2005119706A1 WO 2005119706 A1 WO2005119706 A1 WO 2005119706A1 JP 2005010134 W JP2005010134 W JP 2005010134W WO 2005119706 A1 WO2005119706 A1 WO 2005119706A1
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- lithium
- sulfide
- solid electrolyte
- electrode active
- active 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
- 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
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/122—Ionic conductors
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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
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0562—Solid materials
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
-
- 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
- H01M2300/0088—Composites
- H01M2300/0091—Composites in the form of mixtures
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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 high-purity lithium sulfide, and more specifically, a lithium ion conductive inorganic solid using lithium sulfide containing a small amount of impurities such as a lithium salt of sulfur sulfide and lithium N-methylaminobutyrate (LMAB).
- the present invention relates to a method for producing an electrolyte and a lithium battery using the electrolyte.
- the present invention provides a high-performance all-solid-state using a lithium ion conductive inorganic solid electrolyte produced from lithium sulfide and one or more components selected from diphosphorus pentasulfide, simple phosphorus and simple sulfur as a solid electrolyte. More specifically, the present invention relates to a lithium battery. More specifically, a positive electrode active material having an operating potential of 3 V or more and a negative electrode active material having a reduction potential (potential of the negative electrode active material) of 0.5 V or less are used.
- a secondary battery is a battery that can be charged and discharged.
- Inorganic solid electrolytes are nonflammable in nature and are safer materials than ordinary electrolytes.
- inorganic solid electrolytes are used instead of organic solvent electrolytes. It is effective to use a body electrolyte.
- Inorganic solid electrolytes are nonflammable in nature and have higher safety than commonly used organic solvent electrolytes! It is desired to develop an all-solid lithium battery which is a material and is highly safe using the electrolyte.
- Patent Document 1 Various methods for producing lithium sulfide are known (for example, Patent Document 1).
- lithium sulfide is produced in an aprotic organic solvent such as N-methyl-2-pyrrolidone (NMP). Since the process can be performed continuously, it is economical and simple. Is a manufacturing method.
- NMP N-methyl-2-pyrrolidone
- Patent Document 2 a method of reacting lithium hydroxide with a gaseous sulfur source at a temperature of 130 to 445 ° C (Patent Document 2) is known.
- lithium salts of sulfur oxides eg, lithium sulfite, lithium sulfate, lithium thiosulfate, etc.
- lithium sulfite lithium sulfate
- lithium thiosulfate lithium thiosulfate
- a solid electrolyte is produced by performing a melting reaction of this lithium sulfide with, for example, diphosphorus pentasulfide and quenching, a complete glass electrolyte cannot be easily obtained due to the influence of impurities.
- the obtained solid electrolyte is a crystallized substance having low ionic conductivity, the intended battery performance cannot be exhibited when used as a solid electrolyte for a lithium battery! ,.
- lithium ion conductive solid electrolyte used for the all solid lithium battery those having high ion conductivity are preferable.
- Such solid electrolyte a sulfide glass having an ion conductivity of 10- 3 S / cm in the 1980s, namely, Lil Li SP S, Lil- Li S- BS, Lil Li S- SiS etc. see
- Li PO Li S—SiS, Li SiO Li S—SiS, etc. were also found.
- Non-Patent Document 1 Using a carbon material as the negative electrode active material and Li PO Li S—SiS as the solid electrolyte
- the solid electrolyte reacts with the negative electrode active material and the reductive decomposition reaction of the solid electrolyte proceeds.
- a carbon material is used as a negative electrode active material
- lithium cobalt oxide (LiCoO) is used as a positive electrode active material
- Non-Patent Document 2 As a solid electrolyte, two layers of two electrolytes, Li S-P S Lil and Li S-GeS P S
- a solid electrolyte containing silicon or germanium such as Li S-SiS or Li S-GeS is used.
- the current flowing during charging of the battery is consumed in the reaction of inserting lithium ions into the carbon material and the reduction reaction of silicon or germanium.
- an improvement point has been considered in an all-solid lithium secondary battery using a carbon material or a material in which lithium ions are inserted between layers of a carbon material as a negative electrode active material.
- a substance that does not contain silicon and germanium is used as the solid charge in contact with the substance, and phosphorus sulfide (PS) is used as a raw material for the electrolyte.
- PS phosphorus sulfide
- lithium iodide Li
- the oxidation potential of the electrolyte is 2.9 V. Therefore, when a positive electrode active material having a battery operating potential of 3 V or more is used, An oxidative decomposition reaction occurs, and the secondary battery does not operate. Therefore, it is preferable not to use a compound such as lithium iodide.
- a single layer is preferred over a two layer. That is, as a negative electrode active material having a reduction potential of 0.5 V or less, for example, a carbon material typified by a graphite intercalation compound, and as a positive electrode active material having an operating potential of 3 V or more, a compound such as lithium cobaltate is used.
- a solid electrolyte By selecting a solid electrolyte to be used, it is expected that an all-solid-state lithium battery having a single-layer electrolyte and a high potential and high energy density of 4V class can be obtained.
- the graphite intercalation compound exhibits a theoretical capacity of 372 mAhZg and a base potential of about 0.4 IV, and lithium cobaltate exhibits a potential of 4 V on the basis of lithium as lithium ions are desorbed.
- Non-patent Reference 1 Kazunori Takada, batoshi Naknano, Taro Inada, Akinisa Kajiyama, hi deki Sasaki, Shigeo Kondo and Mamoru Watanabe, Journal of Electrochemical, 150 (3) A274-A277 (2003)
- Non-Patent Document 2 Kazunori Takada, Taro Inada, Akihisa Kajiyama, Hideki Sasaki, Shige o Kondo, Mamoru Watanabe, Masahiro Murayama, Ryoji Kanno, Solid State Ionics 1 58 (2003) 269-274
- Patent document 1 JP-A-7-330312
- Patent Document 2 JP-A-9283156
- the present invention provides a novel and efficient method for producing a lithium ion conductive inorganic solid electrolyte having high ion conductivity and a high performance lithium battery using the electrolyte. It is the purpose.
- Another object of the present invention is to make it possible to increase the energy density of an all-solid lithium battery by developing a high-performance solid electrolyte that can be used in a single layer.
- the present inventors have conducted intensive studies to achieve the above object, and as a result, have found that high-purity sulfide By subjecting lithium and one or more selected from diphosphorus pentasulfide, elemental phosphorus or elemental sulfur to a melting reaction, quenching, and further heat treatment, it is possible to obtain a lithium ion conductive inorganic solid electrolyte having high ion conductivity. I found what I can do.
- the present inventors have conducted intensive studies to achieve the above object, and as a result, as a solid electrolyte, lithium sulfide, one or more components selected from diphosphorus pentasulfide, elemental phosphorus and elemental sulfur.
- the above object can be achieved by using a lithium ion conductive inorganic solid electrolyte produced from and a positive electrode active material having an operating potential of 3 V or more and a negative electrode active material having a reduction potential of 0.5 V or less.
- the present invention has been completed based on such findings.
- a method for producing a lithium ion conductive inorganic solid electrolyte which comprises heat-treating the glass electrolyte obtained by the method according to any one of the above 1 to 3.
- At least a lithium ion conductive inorganic solid electrolyte in contact with the negative electrode active material is made of lithium sulfide and One or more components selected from diphosphorus sulfide, simple phosphorus and simple sulfur Lithium battery characterized by being manufactured,
- Lithium sulfide is purified by reacting lithium hydroxide and hydrogen sulfide in an organic solvent and then removing hydrogen sulfide.
- the total content of lithium salts of sulfur oxides is 0.15% by mass or less
- the present invention is selected from lithium sulfide having a content of lithium salt of sulfur sulfide and lithium N-methylaminobutyrate of 0.15% by mass or less, diphosphorus pentasulfide, elemental phosphorus or elemental sulfur, respectively.
- After melting reaction of one or more, quenching and further by heat treatment, is 1 X 10- 3 (SZcm) easily obtain high ionic conductivity of lithium ion conductive inorganic solid electrolyte in the order ionic conductivity
- a high-performance lithium battery can be manufactured by using the electrolyte.
- a lithium ion conductive inorganic solid electrolyte produced from lithium sulfide and one or more components selected from diphosphorus pentasulfide, elemental phosphorus and elemental sulfur can be used as a single layer.
- a positive electrode active material having a potential of 3 V or more and a negative electrode active material having a reduction potential of 0.5 V or less a high-performance all-solid lithium battery can be easily manufactured.
- FIG. 1 is a view showing X-ray diffraction patterns of powder samples of Example 1 and Comparative Example 1.
- FIG. 2 is a view showing an X-ray diffraction pattern of a powder sample of Example 2.
- FIG. 3 is a diagram showing the charge / discharge characteristics of the battery obtained in Example 3.
- FIG. 4 is a graph showing the charge / discharge cycle characteristics of the battery obtained in Example 3.
- FIG. 5 is a view showing the charge / discharge characteristics of the battery obtained in Comparative Example 3.
- the glass electrolyte of the present invention can be produced by subjecting a high-purity lithium sulfide to a melting reaction with at least one selected from phosphorus pentasulfide, elemental phosphorus and elemental sulfur, followed by quenching.
- the high-purity lithium sulfide used in the present invention has a total lithium salt content of 0.15% by mass or less, preferably 0.1% by mass or less, and lithium lithium N-methylaminobutyrate. The content is 0.15% by mass or less, preferably 0.1% by mass or less.
- the obtained electrolyte is vitreous (completely amorphous).
- the obtained electrolyte is initially a crystallized product, and the ionic conductivity of the crystallized product is low.
- the crystallized product is subjected to the following heat treatment, it is not possible to obtain a lithium ion conductive inorganic solid electrolyte having a high ionic conductivity with no change in the crystallized product.
- the content of lithium N-methylaminobutyrate is 0.15% by mass or less, the degraded lithium N-methylaminobutyrate does not lower the cycle performance of the lithium secondary battery.
- the mixing (melting) molar ratio of the above-mentioned lithium sulfide and one or more components selected from phosphorus pentasulfide, elemental phosphorus and elemental sulfur is usually 50:50 to 80:20, preferably 60:40 to 75. : 25.
- the melting reaction temperature of the above mixture is usually 500 to 1000 ° C, preferably 600 to 1000 ° C. C, more preferably 900 to: L000 ° C, and the melting reaction time is usually 1 hour or more, preferably 6 hours or more.
- the quenching temperature of the molten reactant is usually 10 ° C or lower, preferably 0 ° C or lower, and the cooling rate is about 1 to 100000Zsec, preferably 1 to 100OKZsec.
- the thus-obtained electrolyte is glassy (fully amorphous), which is usually an ionic conductivity of 1. 0 X 10- 5 ⁇ 8. 0 X 10- 5 (SZcm).
- the lithium ion conductive inorganic solid electrolyte of the present invention can be produced by subjecting the glass electrolyte of the present invention to heat treatment.
- the heat treatment is usually about 170 to 370 ° C., preferably 180 to 330 ° C., and more preferably 200 to 290 ° C.
- the heat treatment time depends on the heat treatment temperature, but is usually 1 minute or more. It takes 5 minutes to 24 hours.
- lithium ion conductive inorganic solid electrolyte usually, ionic conductivity is a 7. 0 X 10- 4 ⁇ 3. 0 X 10- 3 (SZcm).
- a lithium battery having excellent long-term stability can be obtained.
- the method for producing lithium sulfide used in the present invention is not particularly limited as long as the method can reduce the above impurities.
- the method a or b is particularly preferred.
- Lithium hydroxide and sulfide hydrogen are reacted in an aprotic organic solvent at 0 to 150 ° C to produce lithium hydrosulfide, and then the reaction solution is desulfurized at 150 to 200 ° C. (Patent Document 1).
- Patent Document 1 A method in which lithium hydroxide and hydrogen sulfate are reacted at 150 to 200 ° C. in an aprotic organic solvent to directly produce lithium sulfide.
- Patent Document 2 A method of reacting lithium hydroxide with a gaseous sulfur source at a temperature of 130 to 445 ° C (Patent Document 2).
- the method for purifying the lithium sulfide obtained as described above is not particularly limited.
- Preferred purification methods include, for example, Japanese Patent Application No. 2003-363403.
- the lithium sulfide obtained as described above is washed at a temperature of 100 ° C. or higher using an organic solvent.
- NMP N-methyl-2-pyrrolidone
- NMP N-methyl-2-pyrrolidone
- LMAB lithium minobutyrate
- the organic solvent used for washing is preferably an aprotic polar solvent, and the aprotic organic solvent used for lithium sulfate production and the aprotic polar organic solvent used for washing are the same. Is more preferred.
- aprotic polar organic solvent examples include, for example, non-protonic polar organic compounds such as amide compounds, ratatum compounds, urea compounds, organic sulfur compounds, and cyclic organic phosphorus compounds. It can be suitably used as a single solvent or a mixed solvent.
- examples of the amido conjugate include N, N dimethylformamide, N, N dimethylformamide, N, N dimethylacetamide, and N, N dipropylacetate.
- examples include amides and N, N-dimethylbenzoic acid amides.
- ratatam compound examples include, for example, caprolactam, N-methylcaprolactam, Nethylcaprolatatam, N-isopropyl caprolatum, N-isobutylcaprolatatam, N-n-propyl caprolatum, N-n-butylcaprolatatam N-alkyl prolatatams such as N-cyclohexylcaprolatatam, N-methyl 2-pyrrolidone (NMP), N-ethyl 2-pyrrolidone, N-isopropyl-12-pyrrolidone, N-isobutyl-2-pyrrolidone, N-n-propyl — 2-pyrrolidone, N-n-butyl-2-pyrrolidone, N-cyclohexyl-2-pyrrolidone, N-methyl-3-methyl—2 pyrrolidone, N-ethyl 3-methyl-2-pyrrolidone, N—methyl 3,4,5-trimethyl-1-
- organic sulfur conjugate examples include dimethyl sulfoxide, getyl sulfoxide, diphenylene sulfone, 1-methyl 1-oxo sulfolane, 1-phenyl-11-oxo sulfolane, and the like. .
- Each of these various aprotic organic compounds may be used alone or in combination of two or more. It can be used as the non-protonic organic solvent by mixing and further mixing with other solvent components not interfering with the object of the present invention.
- N-alkyl-proprotamata and N-alkylpyrrolidone preferred are N-alkyl-proprotamata and N-alkylpyrrolidone, and particularly preferred is N-methyl-2-pyrrolidone (NMP).
- the amount of the organic solvent used for washing is not particularly limited, and the number of times of washing is not particularly limited, but is preferably two or more times.
- the washing is preferably performed under an inert gas such as nitrogen or argon.
- the washed lithium sulfide is heated at a temperature equal to or higher than the boiling point of the aprotic organic solvent used for washing, under an inert gas stream such as nitrogen, under normal pressure or reduced pressure, for 5 minutes or longer, preferably about 2 minutes.
- the lithium sulfide used in the present invention can be obtained.
- the solid electrolyte (glass electrolyte or lithium ion conductive inorganic solid electrolyte) obtained by the method of the present invention is incorporated in a lithium battery, it can be applied to a known mode without any particular limitation.
- the solid electrolyte is formed into a sheet shape.
- any of coin type, button type, sheet type, laminated type, cylindrical type, flat type, square type, large type used for electric vehicles and the like can be applied.
- the solid electrolyte obtained by the method of the present invention is used for lithium batteries such as portable information terminals, portable electronic devices, household small power storage devices, motorcycles using electric motors, electric vehicles, and hybrid electric vehicles. Capabilities that can be performed are not particularly limited to these.
- the lithium ion conductive inorganic solid electrolyte of the present invention lithium sulfide, diphosphorus pentasulfide, It can be produced from one or more components selected from simple phosphorus and simple sulfur. Specifically, it can be produced by subjecting a lithium sulfide, one or more components selected from diphosphorus pentasulfide, elemental phosphorus and elemental sulfur to a raw material, to a melting reaction, and then quenching.
- lithium sulfide and one or more components selected from diphosphorus pentasulfide, elemental phosphorus and elemental sulfur as raw materials.
- the lithium sulfide used in the present invention has a total content of at least 0.15% by mass or less, preferably 0.1% by mass or less of lithium salt of sulfur oxidized product, and lithium N-methylaminobutyrate.
- the content is 0.15% by mass or less, preferably 0.1% by mass or less.
- the obtained electrolyte is a glassy electrolyte (completely amorphous).
- the obtained electrolyte is initially a crystallized product, and the ionic conductivity of the crystallized product is low.
- the crystallized product does not change.
- a lithium ion conductive inorganic solid electrolyte having high ionic conductivity cannot be obtained.
- the content of lithium N-methylaminobutyrate is 0.15% by mass or less, the deterioration of lithium N-methylaminobutyrate does not lower the cycle performance of the lithium battery. To obtain it, it is necessary to use lithium sulfide with reduced impurities.
- the mixing molar ratio of the above lithium sulfide and one or more components selected from diphosphorus pentasulfide, elemental phosphorus and elemental sulfur is usually 50:50 to 80:20, preferably 60:40 to 75:25.
- the melting reaction temperature using lithium sulfide and at least one component selected from diphosphorus pentasulfide, elemental phosphorus and elemental sulfur is usually 500 to 1000 ° C, preferably 600 to 1000 ° C, and more preferably 900 to: L000 ° C, and the melting reaction time is usually 1 hour or more, preferably 6 hours or more.
- the quenching temperature of the reactant is usually 10 ° C. or lower, preferably 0 ° C. or lower, and the cooling rate is about 1 to 100000Zsec, preferably 1 to 100OKZsec.
- the mechanical-milling method using lithium sulfide and one or more components selected from diphosphorus pentasulfide, elemental phosphorus, and elemental sulfur as raw materials can carry out the reaction at room temperature.
- a glassy electrolyte (completely amorphous) can be produced at room temperature, so that pyrolysis of the raw material does not occur, and a glassy electrolyte of the charged composition can be obtained. There is.
- the mechanical milling method also has the advantage that the glassy electrolyte can be finely divided at the same time as the production of the glassy electrolyte (completely amorphous).
- the base revolves while the pot rotates, and can generate very high impact energy efficiently.
- the rotation speed and rotation time of the mechanical milling method are not particularly limited, but the higher the rotation speed, the faster the generation rate of the vitreous electrolyte (completely amorphous), and the longer the rotation time, the more the raw material to the vitreous electrolyte becomes. The conversion is higher.
- the thus-obtained electrolyte is glassy electrolyte (completely amorphous), usually I O emissions conductivity is 1. 0 X 10- 5 ⁇ 8. 0 X 10- 5 (SZcm) .
- the lithium ion conductive inorganic solid electrolyte of the present invention is preferably produced by further heat-treating the above-mentioned glassy electrolyte.
- the heat treatment temperature is usually about 170 to 370 ° C, preferably 180 to 330 ° C, and more preferably 200 to 290 ° C.
- the heat treatment time depends on the heat treatment temperature, but is usually 1 minute or more. It takes 5 minutes to 24 hours.
- lithium ion conductive inorganic solid electrolyte usually, ionic conductivity is a 7. 0 X 10- 4 ⁇ 3. 0 X 10- 3 (SZcm).
- the method for producing lithium sulfide used in the present invention 2 is not particularly limited as long as it can reduce at least the above impurities.
- the method for purifying lithium sulfide obtained as described above is not particularly limited.
- a preferable purification method is, for example, Japanese Patent Application No. 2003-363403.
- Examples of the negative electrode active material having a reduction potential of 0.5 V or less in the present invention include a carbon material or a material having lithium ions inserted between layers of the carbon material, and are preferably a carbon material.
- the carbon material exhibits an extremely low potential of about 0.4 IV in increasing the energy density of the lithium battery, and is excellent in increasing the energy density of the lithium battery.
- lithium ions are inserted between layers of the carbon material in a charged state, and lithium ions between layers are desorbed in a completely discharged state, Return to the original carbon material.
- the positive electrode active material having an operating potential of 3 V or more in the present invention LiCoO, LiN
- Examples include lithium metal salts such as iO and LiMnO, and MnO and VO.
- the carbon material as the negative electrode active material in the present invention is stable in a state where lithium ions are not inserted between layers, practically, the carbon material does not contain lithium ions. It is preferable to form a lithium battery using a carbon material.
- lithium cobalt oxide (LiCoO 2) is most suitable.
- the present invention can be applied to a known mode without any particular limitation.
- an all-solid lithium battery including a sealing plate, insulating packing, an electrode plate group, a positive electrode plate, a positive electrode lead, a negative electrode plate, a negative electrode lead, a solid electrolyte, and an insulating ring in a battery case
- the solid electrolyte is formed into a sheet.
- the shape of the all-solid lithium battery can be applied to any of coin type, button type, sheet type, stacked type, cylindrical type, flat type, square type, large type used for electric vehicles and the like.
- a conventionally known method can be used as a method for manufacturing an all-solid lithium battery using the lithium ion conductive inorganic solid electrolyte of the present invention.
- the lithium ion conductive inorganic solid electrolyte of the present invention can be used as an all-solid lithium battery for a portable information terminal, a portable electronic device, a small household power storage device, a motorcycle using a motor as a power source, an electric vehicle, a hybrid electric vehicle, and the like. Forces that can be used are not particularly limited to these.
- NMP was decanted at this temperature.
- NMP100 mL was mashed, stirred at 105 ° C for about 1 hour, NMP was decanted at this temperature, and the same operation was repeated a total of four times.
- the impurity content in the obtained lithium sulfide was measured.
- the impurities such as lithium sulfite (Li SO), lithium sulfate (Li SO), and lithium thiosulfate
- Titanium (Li S O) and lithium N-methylaminobutyrate (LMAB) are ion chromatographed.
- the quartz tube was put into ice water and rapidly cooled.
- the quartz tube was opened, and the powder sample of the obtained molten reaction product was subjected to X-ray diffraction. As a result, the peaks of lithium sulfide and pentasulfide were lost, and vitrification proceeded. (See Fig. 1, CPS indicates the X-ray reflection intensity.)
- Example 1 The glass electrolyte obtained in Example 1 was heat-treated at 250 ° C. for 30 minutes.
- this powder sample where the one row of the measurement of the electrical conductivity by an AC impedance method, ion conductivity at room temperature was 8. 4 X 10- 4 SZcm.
- a molten reaction product and a quenching operation were performed in the same manner as in Example 1 except that the commercially available lithium sulfide (manufactured by Aldrich Chemical Co., Ltd.) of Reference Example 2 was used instead of the high-purity lithium sulfide of Reference Example 1. Powder sample! As a result of X-ray diffraction, it was confirmed that the reaction product did not undergo vitrification and was a crystallized product (see FIG. 1).
- this powder sample where measurement of the electrical conductivity was one row by the AC impedance method and an ion conductivity 3. 6 X 10- 5 SZcm at room temperature.
- the crystal electrolyte obtained in Comparative Example 1 was heat-treated at 250 ° C. for 30 minutes. About the powder sample of the heat-treated product obtained! As a result of X-ray diffraction, it was confirmed that it was the same as Comparative Example 1 (see FIG. 1).
- this powder sample where the one row of the measurement of the electrical conductivity by an AC impedance method, ion conductivity at room temperature was 5. 9 X 10- 5 SZcm.
- lithium battery Using carbon graphite (manufactured by TIMCAL, SFG-15) as the negative electrode active material and lithium cobalt oxide (LiCoO) as the positive electrode active material, a lithium battery was produced as follows.
- the lithium ion conductive solid electrolyte obtained in Example 2 and carbon graphite were mixed at a mass ratio of 1: 1 to obtain a negative electrode material.
- the lithium ion conductive solid electrolyte 150 mg was interposed therebetween and molded into a three-layered pellet to obtain a measurement cell.
- the initial charging and discharging efficiency 85.8%.
- Figure 3 shows the charge / discharge characteristics
- the vertical axis indicates the terminal voltage (V), and the horizontal axis indicates the capacity for lithium cobalt oxide (lg).
- V terminal voltage
- Lg lithium cobalt oxide
- the operating potential of this battery [potential difference of the positive electrode when the standard electrode potential of lithium metal is set as a reference (OV)] is 3.5 V, and the potential of the negative electrode active material [based on the standard electrode potential of lithium metal] (Potential difference of the negative electrode in the case of (OV)) was 0.4.
- GeS was used as the solid electrolyte.
- Li S—PS (Cholicon-based electrolyte, composition ratio: Li; 0.35, Ge: 0.25, P: 0.75, S;
- a measurement cell was prepared and the battery characteristics were examined in the same manner as in Example 3 except for using 4).
- the initial charge / discharge efficiency was 16.5%.
- Figure 5 shows the charge / discharge characteristics
- the vertical axis represents the terminal voltage (V), and the horizontal axis represents the capacity with respect to the cholesteric electrolyte lg.
- V terminal voltage
- H cholesteric electrolyte
- the solid electrolyte obtained by the method of the present invention can be used in lithium-ion batteries such as portable information terminals, portable electronic devices, small household power storage devices, motorcycles using electric motors as electric power sources, electric vehicles, and hybrid electric vehicles. Power that can be used for batteries The invention is not particularly limited to these. Further, the all-solid lithium battery of the present invention can be used as a battery for a portable information terminal, a portable electronic device, a small household power storage device, a motorcycle using a motor as a power source, an electric vehicle, a hybrid electric vehicle, and the like. .
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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DE112005001270T DE112005001270T5 (de) | 2004-06-04 | 2005-06-02 | Leistungsstarke Festkörper-Lithiumbatterie |
JP2006514126A JP4873479B2 (ja) | 2004-06-04 | 2005-06-02 | 高性能全固体リチウム電池 |
US11/628,030 US20070248888A1 (en) | 2004-06-04 | 2005-06-02 | High-Performance All-Solid Lithium Battery |
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JP2004167453 | 2004-06-04 | ||
JP2004-167453 | 2004-06-04 | ||
JP2004234201 | 2004-08-11 | ||
JP2004-234201 | 2004-08-11 |
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WO2005119706A1 true WO2005119706A1 (ja) | 2005-12-15 |
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PCT/JP2005/010134 WO2005119706A1 (ja) | 2004-06-04 | 2005-06-02 | 高性能全固体リチウム電池 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070248888A1 (ja) |
JP (1) | JP4873479B2 (ja) |
DE (1) | DE112005001270T5 (ja) |
TW (1) | TW200603451A (ja) |
WO (1) | WO2005119706A1 (ja) |
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- 2005-06-02 JP JP2006514126A patent/JP4873479B2/ja not_active Expired - Fee Related
- 2005-06-02 WO PCT/JP2005/010134 patent/WO2005119706A1/ja active Application Filing
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WO2007015409A1 (ja) * | 2005-08-02 | 2007-02-08 | Idemitsu Kosan Co., Ltd. | 固体電解質シート |
JP2008004334A (ja) * | 2006-06-21 | 2008-01-10 | Idemitsu Kosan Co Ltd | 硫化物系固体電解質の製造方法 |
CN100486024C (zh) * | 2006-09-29 | 2009-05-06 | 中国科学院上海硅酸盐研究所 | 一种用于二次锂电池的锂镧硅硫固体电解质材料及其制备方法 |
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JP2008103285A (ja) * | 2006-10-20 | 2008-05-01 | Idemitsu Kosan Co Ltd | 全固体バイポーラ電池 |
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JP2012041207A (ja) * | 2010-08-13 | 2012-03-01 | Idemitsu Kosan Co Ltd | 固体電解質ガラス及びその製造方法 |
WO2013042371A1 (ja) | 2011-09-22 | 2013-03-28 | 出光興産株式会社 | ガラス粒子 |
WO2013069243A1 (ja) | 2011-11-07 | 2013-05-16 | 出光興産株式会社 | 固体電解質 |
EP3361545A1 (en) | 2011-11-07 | 2018-08-15 | Idemitsu Kosan Co., Ltd. | Solid electrolyte |
WO2014002483A1 (ja) | 2012-06-29 | 2014-01-03 | 出光興産株式会社 | 正極合材 |
WO2014073197A1 (ja) | 2012-11-06 | 2014-05-15 | 出光興産株式会社 | 固体電解質 |
CN112670560A (zh) * | 2020-09-04 | 2021-04-16 | 华中科技大学 | 硫化物固态电解质及其高温液相制备方法 |
CN112670560B (zh) * | 2020-09-04 | 2022-03-25 | 华中科技大学 | 硫化物固态电解质及其高温液相制备方法 |
CN114039087A (zh) * | 2021-11-08 | 2022-02-11 | 厦门大学 | 硫化物固体电解质及其应用 |
WO2024010077A1 (ja) * | 2022-07-07 | 2024-01-11 | 出光興産株式会社 | 硫化物固体電解質の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4873479B2 (ja) | 2012-02-08 |
US20070248888A1 (en) | 2007-10-25 |
TW200603451A (en) | 2006-01-16 |
JPWO2005119706A1 (ja) | 2008-04-03 |
DE112005001270T5 (de) | 2007-04-26 |
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