WO2011065388A1 - 固体電池 - Google Patents
固体電池 Download PDFInfo
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- WO2011065388A1 WO2011065388A1 PCT/JP2010/070958 JP2010070958W WO2011065388A1 WO 2011065388 A1 WO2011065388 A1 WO 2011065388A1 JP 2010070958 W JP2010070958 W JP 2010070958W WO 2011065388 A1 WO2011065388 A1 WO 2011065388A1
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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
- H01M4/131—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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—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
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a solid state battery.
- batteries particularly secondary batteries
- a lithium ion secondary battery is known to have a relatively large energy density.
- a liquid electrolyte electrolytic solution
- organic solvent has been conventionally used as a medium for moving ions.
- secondary batteries using an electrolytic solution have problems such as leakage of the electrolytic solution. Therefore, development of a solid battery in which all the constituent elements are made of solid using a solid electrolyte has been underway.
- a compound having a NASICON structure has been studied as a solid electrolyte used in a solid state battery.
- -x (PO 4 ) 3 hereinafter referred to as LATP
- LAGP Li 1 + x Al x Ge 2 ⁇ x (PO 4 ) 3
- LAGP is known to be difficult to reduce compared to LATP, but its reduction resistance is not always sufficient.
- LTO lithium-titanium composite oxide having a spinel structure, Li 4 Ti 5 O 12
- the reduction potential of LTO is known to be relatively high at 1.5 V (vs Li / Li + ).
- an object of the present invention is to provide a solid battery having high stability by improving the reduction resistance of the solid electrolyte.
- the present inventors examined the reduction resistance of the solid electrolyte using first-principles calculation.
- the electrode active material the solid electrolyte
- Zr NASICON LiZr 2 (PO 4 ) 3
- a solid battery according to one aspect of the present invention is a solid battery including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer, the positive electrode layer and the negative electrode layer include an electrode active material, and the solid electrolyte layer is a solid electrolyte. And a LiZr 2 (PO 4 ) 3 containing layer is provided on at least a part of the surface of the solid electrolyte contained in the solid electrolyte layer.
- the LiZr 2 (PO 4 ) 3 containing layer is provided on at least a part of the surface of the solid electrolyte contained in the solid electrolyte layer, the positive electrode layer or the negative electrode layer an electrode active material contained in, between the solid electrolyte contained in the solid electrolyte layer, so that the LiZr 2 (PO 4) 3-containing layer is present.
- restoration of the solid electrolyte by an electrode active material can be suppressed.
- a solid battery having high stability can be produced.
- a LiZr 2 (PO 4 ) 3 -containing layer is provided between the solid electrolyte layer and at least one of the positive electrode layer and the negative electrode layer.
- the LiZr 2 (PO 4 ) 3 -containing layer exists between the solid electrolyte layer and at least one of the positive electrode layer or the negative electrode layer, the interface between the solid electrolyte layer and at least one of the positive electrode layer or the negative electrode layer Thus, a solid battery excellent in stability can be obtained.
- the solid electrolyte layer includes a solid electrolyte covered with a LiZr 2 (PO 4 ) 3 containing layer.
- the solid electrolyte layer is provided between the first solid electrolyte layer containing the solid electrolyte and the first solid electrolyte layer and at least one of the positive electrode layer or the negative electrode layer, and contains LiZr 2 (PO 4 ) 3. And a second solid electrolyte layer comprising a solid electrolyte coated with the layer.
- the positive electrode layer and the negative electrode layer contain a solid electrolyte.
- a solid state battery according to another aspect of the present invention is a solid state battery including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer, wherein the positive electrode layer and the negative electrode layer include an electrode active material and a solid electrolyte.
- a LiZr 2 (PO 4 ) 3 -containing layer is provided on at least a partial surface of at least one of the electrode active material or the solid electrolyte contained in at least one of the negative electrode layers.
- LiZr 2 (PO 4 ) 3 is contained on at least a partial surface of at least one of the electrode active material or the solid electrolyte contained in at least one of the positive electrode layer and the negative electrode layer. Since the electrode layer is formed by mixing the solid electrolyte and the electrode active material, the LiZr 2 (between the electrode active material and the solid electrolyte in at least one of the positive electrode layer and the negative electrode layer is formed. There will be a PO 4 ) 3 containing layer. Thereby, reduction
- a LiZr 2 (PO 4 ) 3 -containing layer exists between the electrode active material and the solid electrolyte.
- the LiZr 2 (PO 4 ) 3 containing layer preferably covers the surface of the electrode active material.
- the LiZr 2 (PO 4 ) 3 containing layer preferably covers the surface of the solid electrolyte.
- the solid electrolyte is represented by the general formula Li 1 + x M I x M II 2-x (PO 4) 3 [ wherein, M I is Al or It is preferable that at least one of the solid electrolytes having a NASICON structure represented by “Ga and M II are Ti or Ge” is included.
- the electrode active material is preferably at least one of a lithium titanium composite oxide having a spinel structure or a titanium oxide.
- the reduction resistance of the solid electrolyte is improved by interposing a substance made of LiZr 2 (PO 4 ) 3 between the solid electrolyte and the electrode active material. That is, it is possible to suppress the reduction of the solid electrolyte by the electrode active material. Thereby, a solid battery with high stability can be produced.
- FIG. 1 It is sectional drawing which shows a schematic structure as a structural example (a) of the solid battery of Embodiment 1 of this invention. It is sectional drawing which shows a schematic structure as a structural example (b) of the solid battery of Embodiment 1 of this invention. It is sectional drawing which shows a schematic structure as a structural example (c) of the solid battery of Embodiment 1 of this invention. It is sectional drawing which shows schematic structure as a structural example (d) of the solid battery of Embodiment 1 of this invention, or the structural example (b) of the solid battery of Embodiment 2.
- FIG. 2 It is sectional drawing which shows a schematic structure as a structural example (a) of the solid battery of Embodiment 2 of this invention. It is a figure which shows one example of the component which forms a positive electrode layer or a negative electrode layer in the structure of the solid battery of Embodiment 2 of this invention. It is a figure which shows another example of the component which forms a positive electrode layer or a negative electrode layer in the structure of the solid battery of Embodiment 2 of this invention. It is a figure which shows another example of the component which forms a positive electrode layer or a negative electrode layer in the structure of the solid battery of Embodiment 2 of this invention.
- the electronic structure of a solid electrolyte particularly a solid electrolyte having a NASICON type structure such as LATP, LAGP, or Zr NASICON, consists of a valence band mainly composed of O2p and a conduction band mainly composed of a d orbital of a central metal element.
- the valence band is full of electrons.
- electrons are empty in the conduction band. Therefore, as a result, there are no conduction electrons, and the solid electrolyte having a NASICON structure is electronically an insulator. Since lithium ions can move in this NASICON-type crystal, electric conduction by ions is possible. Therefore, since it is possible to separate the movement of electrons and the movement of ions, the crystals of NASICON type structure can serve as the electrolyte of the battery.
- the reduction resistance of the solid electrolyte having the NASICON structure can be evaluated by an electromotive force with respect to metallic lithium in the lithium ion insertion reaction into the solid electrolyte having the NASICON structure.
- this electromotive force shows a high potential, lithium ions are likely to be inserted into the solid electrolyte, and the solid electrolyte is likely to be reduced.
- this electromotive force is low, lithium ions are hardly inserted into the solid electrolyte, and the solid electrolyte is difficult to be reduced.
- the electromotive force of the battery is made possible by calculating the difference between the sum of the internal energy of the solid electrolyte and metallic lithium before the reaction and the internal energy of the reduced state into which lithium ions have been inserted after the reaction.
- the central metal is a mixed state of Ti and Zr.
- the electromotive force is equivalent to the case where the central metal is Ti, and it can be seen that Ti having low reduction resistance dominates the reducing property of this substance.
- LiZr 2 (PO 4 ) 3 As a solid electrolyte, it is effective to combine LiZr 2 (PO 4 ) 3 with an electrode active material or a solid electrolyte having a NASICON structure. .
- an electrode active material or a solid electrolyte having a NASICON structure By interposing a substance made of LiZr 2 (PO 4 ) 3 between the electrode active material and the solid electrolyte having a NASICON structure, this problem can be solved while taking advantage of LiZr 2 (PO 4 ) 3 .
- any method may be used for interposing a substance composed of LiZr 2 (PO 4 ) 3 between the solid electrolyte having a NASICON type structure and the electrode active material, and is not limited to the interposition method.
- a method for coating or adhering a substance composed of LiZr 2 (PO 4 ) 3 to a solid electrolyte or electrode active material having a NASICON structure an electrode active material or a solid electrolyte having a NASICON structure and LiZr 2 (PO 4 ) 3 can be used.
- a layer serving as a precursor of a substance composed of LiZr 2 (PO 4 ) 3 on the surface of a solid electrolyte or electrode active material having a NASICON structure by a sol-gel method by mechanically dispersing and mixing fine particles with the substance composed of the formed beforehand, LiZr 2 when co-firing of the battery (PO 4) formation of 3 composed of a synthetic and a surface layer of the material and be performed simultaneously, etc. can be considered.
- the solid state battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a positive electrode layer 11 and a negative electrode layer 12.
- the solid electrolyte layer 13 is disposed.
- the LiZr 2 (PO 4 ) 3 containing layer 14 is provided between the negative electrode layer 12 and the solid electrolyte layer 13.
- the solid electrolyte layer 13 is formed from the first solid electrolyte layer 130.
- the first solid electrolyte layer 130 is composed of a large number of solid electrolyte particles 15.
- the positive electrode layer 11 or the negative electrode layer 12 may be composed of a large number of electrode active material particles 16, and is composed of a mixture of a large number of solid electrolyte particles 15 and electrode active material particles 16 as shown in FIG. May be.
- the solid state battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a positive electrode layer 11 and a negative electrode layer 12.
- the solid electrolyte layer 13 is disposed.
- the LiZr 2 (PO 4 ) 3 containing layer 14 is provided between the positive electrode layer 11 and the solid electrolyte layer 13.
- the solid electrolyte layer 13 is formed from the first solid electrolyte layer 130.
- the first solid electrolyte layer 130 is composed of a large number of solid electrolyte particles 15.
- the positive electrode layer 11 or the negative electrode layer 12 may be composed of a large number of electrode active material particles 16, and is composed of a mixture of a large number of solid electrolyte particles 15 and electrode active material particles 16 as shown in FIG. May be.
- the solid state battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a positive electrode layer 11 and a negative electrode layer 12.
- the solid electrolyte layer 13 is disposed.
- the solid electrolyte layer 13 includes a first solid electrolyte layer 130 and two second solid electrolyte layers 131 provided on both sides of the first solid electrolyte layer 130.
- the second solid electrolyte layer 131 is provided between the first solid electrolyte layer 130 and at least one of the positive electrode layer 11 or the negative electrode layer 12.
- the first solid electrolyte layer 130 is composed of a large number of solid electrolyte particles 15.
- the second solid electrolyte layer 131 is composed of a large number of solid electrolyte particles 15 covered with the LiZr 2 (PO 4 ) 3 containing layer 14.
- the positive electrode layer 11 or the negative electrode layer 12 may be composed of a large number of electrode active material particles 16, and is composed of a mixture of a large number of solid electrolyte particles 15 and electrode active material particles 16 as shown in FIG. May be.
- the solid state battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a positive electrode layer 11 and a negative electrode layer 12.
- the solid electrolyte layer 13 is disposed.
- the solid electrolyte layer 13 is formed from the second solid electrolyte layer 131.
- the second solid electrolyte layer 131 is composed of a large number of solid electrolyte particles 15 covered with the LiZr 2 (PO 4 ) 3 containing layer 14.
- the positive electrode layer 11 or the negative electrode layer 12 may be composed of a large number of electrode active material particles 16, and is composed of a mixture of a large number of solid electrolyte particles 15 and electrode active material particles 16 as shown in FIG. May be.
- the LiZr 2 (PO 4 ) 3 containing layer 14 is provided on at least a part of the surface of the solid electrolyte particles 15 included in the solid electrolyte layer 13. Therefore, the LiZr 2 (PO 4 ) 3 -containing layer 14 exists between the electrode active material particles 16 included in the positive electrode layer 11 or the negative electrode layer 12 and the solid electrolyte particles 15 included in the solid electrolyte layer 13. Become. Thereby, reduction
- the LiZr 2 (PO 4 ) 3 containing layer 14 is provided between the solid electrolyte layer 13 and at least one of the positive electrode layer 11 or the negative electrode layer 12. Therefore, the reaction at the interface between the solid electrolyte layer 13 and at least one of the positive electrode layer 11 or the negative electrode layer 12 is suppressed, and a solid battery having excellent stability can be obtained.
- the solid state battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a positive electrode layer 11 and a negative electrode layer 12.
- the solid electrolyte layer 13 is disposed.
- the solid electrolyte layer 13 is formed from the first solid electrolyte layer 130.
- the first solid electrolyte layer 130 is composed of a large number of solid electrolyte particles 15.
- Positive electrode layer 11 or negative electrode as shown in FIG. 10. 12 includes a number of solid electrolyte particles 15 and the electrode active material particles 16, LiZr 2 (PO 4) 3 -containing layer 14 covers the surface of electrode active material particles 16 Alternatively, as shown in FIG.
- the positive electrode layer 11 or the negative electrode layer 12 includes a large number of solid electrolyte particles 15 and electrode active material particles 16, and the LiZr 2 (PO 4 ) 3 -containing layer 14 includes the solid electrolyte particles 15.
- the positive electrode layer 11 or the negative electrode layer 12 includes a large number of solid electrolyte particles 15 and electrode active material particles 16, and a LiZr 2 (PO 4 ) 3 containing layer as shown in FIG. 14 may exist so as to fill a region between the solid electrolyte particles 15 and the electrode active material particles 16.
- the solid state battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a positive electrode layer 11 and a negative electrode layer 12.
- the solid electrolyte layer 13 is disposed.
- the solid electrolyte layer 13 is formed from the second solid electrolyte layer 131.
- the second solid electrolyte layer 131 is composed of a large number of solid electrolyte particles 15 covered with the LiZr 2 (PO 4 ) 3 containing layer 14. As shown in FIG.
- the positive electrode layer 11 or the negative electrode layer 12 includes a large number of solid electrolyte particles 15 and electrode active material particles 16, and the LiZr 2 (PO 4 ) 3 containing layer 14 covers the surface of the electrode active material particles 16.
- the positive electrode layer 11 or the negative electrode layer 12 includes a large number of solid electrolyte particles 15 and electrode active material particles 16, and the LiZr 2 (PO 4 ) 3 -containing layer 14 includes the solid electrolyte particles 15.
- the positive electrode layer 11 or the negative electrode layer 12 includes a large number of solid electrolyte particles 15 and electrode active material particles 16, and a LiZr 2 (PO 4 ) 3 containing layer as shown in FIG. 14 may exist so as to fill a region between the solid electrolyte particles 15 and the electrode active material particles 16.
- the solid state battery 10 of Embodiment 2 configured as described above, at least a part of the surface of at least one of the electrode active material particles 16 or the solid electrolyte particles 15 included in at least one of the positive electrode layer 11 or the negative electrode layer 12 is formed.
- LiZr 2 (PO 4) 3-containing layer 14 is provided, in the case where the electrode layer by mixing the solid electrolyte and the electrode active material, at least one of the positive electrode layer 11 or negative electrode layer 12, the electrode active material A LiZr 2 (PO 4 ) 3 -containing layer 14 exists between the particles 16 and the solid electrolyte particles 15.
- restoration of the solid electrolyte by an electrode active material in at least one of the positive electrode layer 11 or the negative electrode layer 12 can be suppressed.
- the solid battery 10 with high stability can be manufactured.
- the LTO powder and the fine powder of LiZr 2 (PO 4 ) 3 are processed with a mechanical milling device. By this treatment, the surface of the LTO particles is covered with a fine powder of LiZr 2 (PO 4 ) 3 .
- This surface-treated LTO powder is used as a negative electrode active material.
- This negative electrode active material is mixed with LATP, which is a solid electrolyte having a NASICON structure.
- a slurry is prepared by adding a binder and a solvent to the mixture. A negative electrode green sheet is produced from this slurry.
- a slurry is prepared by adding a binder and a solvent to LATP, which is a solid electrolyte having a NASICON structure.
- LATP a solid electrolyte having a NASICON structure.
- An electrolyte green sheet is produced from this slurry.
- lithium manganate having a spinel structure that is a positive electrode active material and LATP that is a solid electrolyte having a NASICON structure are mixed.
- a slurry is prepared by adding a binder and a solvent to the mixture.
- a positive electrode green sheet is produced from this slurry.
- the negative electrode green sheet, the electrolyte green sheet, and the positive electrode green sheet manufactured as described above are laminated and heat-treated to manufacture a sintered and integrated solid battery.
- the LTO powder surface-treated by the mechanical milling method is in a state in which LiZr 2 (PO 4 ) 3 fine particles are firmly attached to the surface of the LTO particles.
- the surface state of the LTO particles is maintained even after the LTO powder is mixed with a solid electrolyte having a NASICON structure and a green sheet is produced from the mixture.
- LiZr 2 (PO 4) 3 particles are not substantially change as it is, LiZr 2 (PO 4 ) Sintering of the solid electrolyte of NASICON type structure existing around the three fine particles and sintering of LTO having LiZr 2 (PO 4 ) 3 fine particles fixed on the surface occur. At this time, sintering proceeds from both sides of the LiZr 2 (PO 4 ) 3 layer, and the surface of LiZr 2 (PO 4 ) 3 also sinters with these substances and integration proceeds.
- the sintered LiZr 2 (PO 4 ) 3 is interposed between the LTO particles, that is, the electrode active material and the solid electrolyte having a NASICON type structure.
- LTO particles that is, the electrode active material
- the solid electrolyte having a NASICON type structure With this structure, direct bonding between the solid electrolyte having a NASICON structure and the electrode active material can be prevented, and reduction of the solid electrolyte having a NASICON structure by the electrode active material can be prevented. Thereby, a solid battery with high stability can be produced.
- the solid battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a solid electrolyte layer 13 disposed between the positive electrode layer 11 and the negative electrode layer 12.
- the solid electrolyte layer 13 is formed from the first solid electrolyte layer 130.
- the first solid electrolyte layer 130 is composed of a number of LATP particles as the solid electrolyte particles 15.
- the negative electrode layer 12 includes LATP particles as a large number of solid electrolyte particles 15 and LTO particles as a large number of electrode active material particles 16, and the LiZr 2 (PO 4 ) 3 -containing layer 14 includes The surface of the electrode active material particles 16 is covered.
- the positive electrode layer 11 is a mixture of LATP particles as a large number of solid electrolyte particles 15 and lithium manganate particles as a large number of electrode active material particles 16.
- the precursor used for the synthesis of LiZr 2 (PO 4 ) 3 is produced by the following method.
- Zr (OC 4 H 9 ) 4 , LiNO 3 .H 2 O and NH 4 H 2 PO 4 are used as starting materials. These raw materials are accurately weighed so that the molar ratio of the components of LiZr 2 (PO 4 ) 3 is obtained.
- a predetermined amount of glycol is added to accelerate the polyesterification and polycondensation reactions. . At this time, the concentration of metal ions is always maintained at 0.20 mol per liter.
- the obtained solution was uniformly applied to the surface of the LATP particles using a tumbling fluidized coating apparatus, and then heat-treated at a temperature of 500 ° C. to thereby convert the precursor of LiZr 2 (PO 4 ) 3 into particles.
- a LATP powder formed on the surface is obtained.
- the surface-treated LATP is used as the solid electrolyte contained in the slurry for producing each of the negative electrode layer and the solid electrolyte layer, and the surface treatment is not performed as the solid electrolyte contained in the slurry for producing the positive electrode layer.
- Use LATP Use LATP.
- a negative electrode green sheet, an electrolyte green sheet, and a positive electrode green sheet are prepared by the same method as in the first specific configuration example, stacked, and heat-treated to prepare a sintered and integrated solid battery.
- a specific configuration example 2 corresponds to the above-described embodiment 2-b.
- the solid battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a solid electrolyte layer 13 disposed between the positive electrode layer 11 and the negative electrode layer 12.
- the solid electrolyte layer 13 is formed from the second solid electrolyte layer 131.
- the second solid electrolyte layer 131 is composed of a number of LATP particles as the solid electrolyte particles 15 covered with the LiZr 2 (PO 4 ) 3 containing layer 14. As shown in FIG.
- the negative electrode layer 12 includes LATP particles as a large number of solid electrolyte particles 15 and LTO particles as a large number of electrode active material particles 16, and the LiZr 2 (PO 4 ) 3 -containing layer 14 includes The surface of the solid electrolyte particles 15 is covered.
- the positive electrode layer 11 is a mixture of LATP particles as a large number of solid electrolyte particles 15 and lithium manganate particles as a large number of electrode active material particles 16.
- a slurry is prepared by adding a binder and a solvent to LTO.
- a negative electrode green sheet is produced from this slurry.
- a slurry is prepared by adding a binder and a solvent to LATP.
- An electrolyte green sheet is produced from this slurry.
- a slurry is prepared by adding a binder and a solvent to LiZr 2 (PO 4 ) 3 .
- a LiZr 2 (PO 4 ) 3 green sheet is produced from this slurry.
- a slurry is prepared by adding a binder and a solvent to lithium manganate.
- a positive electrode green sheet is produced from this slurry.
- the solid battery 10 includes a positive electrode layer 11, a negative electrode layer 12, and a solid electrolyte layer 13 disposed between the positive electrode layer 11 and the negative electrode layer 12.
- the LiZr 2 (PO 4 ) 3 containing layer 14 is provided between the positive electrode layer 11 and the solid electrolyte layer 13.
- the solid electrolyte layer 13 is formed from the first solid electrolyte layer 130.
- the first solid electrolyte layer 130 is composed of a number of LATP particles as the solid electrolyte particles 15.
- the positive electrode layer 11 is composed of a large number of lithium manganate particles as the electrode active material particles 16
- the negative electrode layer 12 is composed of a LTO particle as the large number of electrode active material particles 16.
Abstract
Description
Claims (11)
- 正極層と負極層と固体電解質層とを備えた固体電池であって、
前記正極層と前記負極層が電極活物質を含み、
前記固体電解質層が固体電解質を含み、
前記固体電解質層に含まれる固体電解質の少なくとも一部表面の上にLiZr2(PO4)3含有層が設けられている、固体電池。 - 前記固体電解質層と前記正極層または前記負極層の少なくとも一方との間に、前記LiZr2(PO4)3含有層が設けられている、請求項1に記載の固体電池。
- 前記固体電解質層が、前記LiZr2(PO4)3含有層で被覆された固体電解質を含む、請求項1に記載の固体電池。
- 前記固体電解質層が、固体電解質を含む第1の固体電解質層と、前記第1の固体電解質層と前記正極層または前記負極層の少なくとも一方との間に設けられ、前記LiZr2(PO4)3含有層で被覆された固体電解質を含む第2の固体電解質層とを含む、請求項3に記載の固体電池。
- 前記正極層と前記負極層が、固体電解質を含む、請求項1から請求項4までのいずれか1項に記載の固体電池。
- 正極層と負極層と固体電解質層とを備えた固体電池であって、
前記正極層と前記負極層が電極活物質と固体電解質を含み、
正極層または負極層の少なくとも一方に含まれる前記電極活物質または前記固体電解質の少なくとも一方の少なくとも一部表面の上にLiZr2(PO4)3含有層が設けられている、固体電池。 - 前記電極活物質と前記固体電解質との間に前記LiZr2(PO4)3含有層が存在している、請求項6に記載の固体電池。
- 前記LiZr2(PO4)3含有層が前記電極活物質の表面を被覆している、請求項6または請求項7に記載の固体電池。
- 前記LiZr2(PO4)3含有層が前記固体電解質の表面を被覆している、請求項6から請求項8までのいずれか1項に記載の固体電池。
- 前記固体電解質が、一般式Li1+xMI xMII 2-x(PO4)3[式中、MIはAlまたはGa、MIIはTiまたはGeである]で表わされるナシコン型の構造を有する固体電解質のうち、少なくとも一種類を含む、請求項1から請求項9までのいずれか1項に記載の固体電池。
- 前記電極活物質が、スピネル型の構造を有するリチウムチタン複合酸化物、または、チタン酸化物の少なくとも一方である、請求項1から請求項10までのいずれか1項に記載の固体電池。
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Also Published As
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US20120231350A1 (en) | 2012-09-13 |
CN102612782B (zh) | 2014-12-03 |
JP5403066B2 (ja) | 2014-01-29 |
CN102612782A (zh) | 2012-07-25 |
JPWO2011065388A1 (ja) | 2013-04-18 |
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