WO2004093236A1 - 固体電解質およびそれを含んだ全固体電池 - Google Patents
固体電解質およびそれを含んだ全固体電池 Download PDFInfo
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- WO2004093236A1 WO2004093236A1 PCT/JP2004/005424 JP2004005424W WO2004093236A1 WO 2004093236 A1 WO2004093236 A1 WO 2004093236A1 JP 2004005424 W JP2004005424 W JP 2004005424W WO 2004093236 A1 WO2004093236 A1 WO 2004093236A1
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- solid electrolyte
- transition metal
- lithium
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- metal element
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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
- 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
-
- 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
-
- 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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
-
- 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 an all-solid-state battery, particularly a solid electrolyte used for an all-solid-state lithium secondary battery, and an all-solid-state battery including the solid electrolyte.
- an electrolyte composed of a liquid such as an organic solvent is used as a medium for moving ions. This may cause problems such as electrolyte leakage from the battery.
- lithium halide lithium nitride, lithium oxyacid salt, and derivatives of these are known.
- the phosphorus atoms (P) constituting the lithium nitride phosphate react with water molecules in the wet atmosphere. At this time, the phosphorus atom is reduced from the +5 oxidation state to a lower oxidation state. As a result, lithium nitride phosphate is decomposed and its ion conductivity is significantly reduced.
- An object of the present invention is to provide a solid electrolyte capable of suppressing the decrease in ion conductivity even in a wet atmosphere, and an all-solid battery using such a solid electrolyte. Disclosure of the invention
- the present invention relates to a solid electrolyte composed of Li, 0, P and a transition metal element.
- the transition metal element is selected from Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Ru, Ag, Ta, W , And at least one selected from the group consisting of A t and A u preferable.
- the above solid electrolyte has the following formula:
- the present invention also relates to an all-solid-state battery comprising a positive electrode, a negative electrode, and the above solid electrolyte disposed between the positive electrode and the negative electrode.
- FIG. 1 schematically shows a longitudinal sectional view of an all-solid-state battery provided with a solid electrolyte of the present invention.
- FIG. 2 schematically shows a longitudinal sectional view of a test cell produced in the example.
- FIG. 3 schematically shows a longitudinal sectional view of a test cell in which an Li metal layer is formed on a solid electrolyte instead of a current collector.
- the solid electrolyte of the present invention comprises lithium (L i), phosphorus (P), oxygen (O) and transition metal element T.
- this solid electrolyte is phosphoric acid It consists of lithium and transition metal element T.
- the transition metal element ⁇ may be incorporated into lithium phosphate at the atomic level, or lithium phosphate and the transition metal element ⁇ may be mixed at the particle level.
- the solid electrolyte of the present invention may be composed of a transition metal oxide or a lithium-containing transition metal oxide, and lithium phosphate, instead of the above transition metal element ⁇ .
- the solid electrolyte of the present invention contains the transition metal element ⁇ .
- the transition metal element ⁇ has high reducibility and can easily change its valence compared to the phosphorus atom.
- the transition metal element ⁇ is preferentially reduced over phosphorus atoms.
- most of the phosphorus atoms are not reduced and the original oxidation number is maintained, and the decomposition of the solid electrolyte is suppressed. Therefore, the decrease in ion conductivity due to the decomposition of the solid electrolyte is also suppressed.
- x 2 to 7
- y 0. 0 1 to 1
- z 3. 5 to 8.
- the reduction of the phosphorus atom is suppressed by the addition of the transition metal element T. Therefore, the molar ratio y ((the number of moles of T) / (the number of moles of P)) of the transition metal element T to the phosphorus atom in lithium phosphate constituting the solid electrolyte is important. As mentioned above, it is desirable that the molar ratio y be 0.01 to 1.
- the reduction of the phosphorus atom can not be sufficiently suppressed.
- the electron conductivity increases when the molar ratio y exceeds 0.5.
- the solid electrolyte may self-discharge when the all solid battery is in a charged state.
- various transition metal oxides or lithium-containing transition metal oxides may be used in addition to single substances of various transition metal elements T.
- the composition of the solid electrolyte changes depending on the simple substance of the transition metal element T to be used, the transition metal oxide, the type of transition metal oxide containing lithium, the mixing ratio with lithium phosphate, and the like. Therefore, X is preferably 2 to 7, and z is preferably 3.5 to 8.
- the solid electrolyte of the present invention can be produced using, for example, a simple substance of lithium phosphate and transition metal element T as a raw material. Also, as described above, instead of a single transition metal element T, a transition metal oxide or a lithium-containing transition metal oxide may be used.
- lithium phosphates to be used include lithium orthophosphate (L i s P C), and other lithium phosphates
- Solid Electrolyte Consisting of a Single Element of Transition Metal Element T and Lithium Phosphate The solid electrolyte of the present invention can be produced by various methods. For example, in the case of producing a thin film of a solid electrolyte, a thin film production method carried out under vacuum can be used as the production method.
- the thin film production method performed under the above vacuum includes a sputtering method, an evaporation method and the like.
- the target may be formed in an argon (Ar) atmosphere, an oxygen (02) atmosphere, or a mixed atmosphere of argon and oxygen by a means such as a magnetron or a high frequency generator.
- Sputtering eg, rf magnetron sputtering
- rf magnetron sputtering may be used.
- a deposition method for example, a resistance heating deposition method in which deposition is performed by heating a deposition source with heat generated by energizing a resistor, an ion beam in which deposition is performed by irradiating the deposition source with an ion beam by an ion beam.
- Evaporation method Electron beam evaporation method in which evaporation source is heated by irradiating the deposition source with electron beam to the deposition source, electron beam evaporation method in which evaporation source is irradiated with laser to heat the deposition source Abduction methods and the like.
- both targets of lithium phosphate and of a transition metal element target are used as a getter.
- both a lithium phosphate vapor deposition source and a transition metal element vapor deposition source are used as a vapor deposition source.
- lithium phosphate mixed with a simple substance of transition metal element T at a predetermined mixing ratio may be used as a deposition source.
- the mixing ratio is appropriately adjusted according to the composition of the desired solid electrolyte.
- lithium phosphate and transition are used, such as resistance heating vapor deposition for evaporation of lithium phosphate and electron beam evaporation for evaporation of transition metal elements. It is also possible to apply different vapor deposition methods to metallic elements.
- transition metal element ⁇ used when producing a solid electrolyte, titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co) ), Nickel (Ni), Copper (Cu), Zirconium (Zr), Niobium (N), Molybdenum (Mo), Ruthenium (Ru), Silver (Ag), Tantalum (Ta), Tungsten It is preferable to use at least one selected from the group consisting of (W), platinum (P t), and gold (A u). Of course, transition metal elements other than the above may be used as long as the effects of the present invention are not impaired.
- the valences of the L i atom, the phosphorus atom and the oxygen atom are respectively + 1 valence, + 5 valence and 1 valence.
- T can be regarded as zero-valent because it is considered to be incorporated in the state of metal in lithium phosphate.
- the solid electrolyte of the present invention can also be produced from a transition metal oxide and lithium phosphate. Also in this case, the sputtering method or the vapor deposition method as described above ( ⁇ ) can be used.
- the transition metal oxide to be used titanium oxide ( ⁇ 2), vanadium oxide (V 2 05, VO 2), chromium oxide (C r 2 0 3), manganese oxide ( ⁇ ⁇ ⁇ 2, ⁇ 2 ⁇ 203), iron oxide (Fe203, Fe3O4), cobalt oxide (Co34, Co0), nickel oxide (Ni34, Ni0), oxidation Copper (C u ⁇ ), Zirconium oxide (Z r 2 2), Niobium oxide,
- a solid electrolyte composed of a transition metal oxide and lithium phosphate can also be represented by the formula L i a P O b — T c O d. in this case,
- a 2 to 3
- b 3.5 to 4
- c 0. 0 1 to 1
- the solid electrolyte of the present invention can also be produced from a lithium-containing transition metal oxide and lithium phosphate.
- lithium titanate As the above lithium-containing transition metal oxide, lithium titanate
- Li 4 T i O 4, L i 2 T i O 3 lithium panadate (L i sV 04, L i V O 3), lithium chromate (L i 2 C r o 4), lithium manganate (LiMnO4, Li2Mn002, LiMnO2), lithium iron oxide (LiFeO2), lithium cobaltate (LiCoO2), lithium nickelate (Li Li i N i) 2), lithium copper oxide (L i 2 C u O 2), lithium zirconate (L i 4 Z r 4 4, L i 2 Z r O 3), lithium niobate (L i i sNb 4 4, L i Nb Os), lithium molybdate
- lithium-containing transition metal oxides other than the above can be used as long as the effects of the present invention are not impaired.
- FIG. 1 shows a longitudinal sectional view of an all-solid lithium secondary battery using the solid electrolyte of the present invention.
- the all-solid-state lithium secondary battery shown in FIG. 1 comprises a first current collector 12, a first electrode 13, a solid electrolyte 14 and a second electrode 1, which are sequentially stacked on a substrate 1 1 and a substrate 1 1. 5 and the second current collector 16
- the first electrode 13 is a positive electrode
- the second electrode 15 is a negative electrode.
- the whole of the first electrode 13 is completely covered with the solid electrolyte 14.
- the second electrode 15 is disposed to face the first electrode 13 via the solid electrolyte 14. Furthermore, the entire second electrode 15 is completely covered with the second current collector 16.
- the first electrode 13 may be a negative electrode
- the second electrode 15 may be a positive electrode. Yes.
- an electrically insulating substrate such as alumina, glass or polyimide film, a semiconductor substrate such as silicon, or a conductive substrate such as aluminum or copper can be used.
- the substrate has a small surface roughness, it is useful to use a substrate having a flat surface, such as a mirror plate.
- the first current collector 12 one made of an electron conductive material capable of forming a thin film can be used.
- examples of such materials include platinum, platinum Z palladium, gold, silver, aluminum, copper, ITO (indium-tin oxide film) and the like.
- materials which are electron conductive and do not react with the first electrode can be used.
- this when using a substrate made of a conductive material such as aluminum, copper, stainless steel, etc. as the substrate 1 1, this functions as a current collector, so the first current collector 1 2 is unnecessary. .
- the first electrode 13 which is a positive electrode
- a positive electrode active material that can be formed into a thin film
- LiCO2 lithium cobaltate
- LiNi2O2 lithium nickelate
- LiMn2O4 lithium manganate
- V205 transition metal oxide vanadium oxide
- the positive electrode one composed of (M o O 3), titanium sulfide (T i S 2) or the like.
- the second electrode 15 which is a negative electrode
- a negative electrode active material capable of forming a thin film
- graphite carbon material such as hard carbon, silicon
- the second current collector 16 one made of an electron conductive material capable of forming a thin film can be used.
- Such materials include platinum, platinum noble metal, gold, silver, aluminum, copper, I T O, and carbon materials.
- materials which are electron conductive and do not react with the solid electrolyte 14 and the second electrode 15 can also be used.
- the all-solid-state battery of FIG. 1 a solid electrolyte as described above is used.
- the solid electrolyte of the present invention can maintain high ion conductivity even in a wet atmosphere. For this reason, the all-solid-state battery using such a solid electrolyte can suppress deterioration of its battery performance, for example, charge / discharge rate characteristics, even in a wet atmosphere.
- the thickness is preferably 0.1 to 10 m.
- a resin or an aluminum laminate film can be laminated on the second current collector 16 to form a protective layer of the battery.
- the solid electrolyte consisting of P, L i, O and transition metal element T of the present invention is used for the all solid lithium secondary battery, but batteries other than all solid lithium secondary batteries are used. Also, the solid electrolyte of the present invention can be used.
- the all-solid-state battery shown in FIG. 1 includes, for example, a first current collector 12, a first electrode 13, a solid electrolyte 14, a second electrode 15, and a second current collector 1 on a substrate 11. 6 can be produced by laminating in order. Next, the manufacturing method will be specifically described.
- the first current collector 12 is formed on the substrate 11 by sputtering or vapor deposition using the above-described materials.
- a sputtering method for example, a sputtering method in which a target is sputtered in an argon atmosphere, an oxygen atmosphere, or a mixed atmosphere of argon and oxygen by a means such as a magnetron or a high frequency generator (eg, rf Magnetron sputtering etc.).
- a sputtering method for example, a sputtering method in which a target is sputtered in an argon atmosphere, an oxygen atmosphere, or a mixed atmosphere of argon and oxygen by a means such as a magnetron or a high frequency generator (eg, rf Magnetron sputtering etc.).
- a vapor deposition method resistance heating vapor deposition method, electron beam vapor deposition method, electron beam vapor deposition method, laser irradiation method and the like can be mentioned.
- the first electrode 13 which is a positive electrode is formed on the first current collector 12 using the positive electrode material as described above.
- a solid electrolyte 14 is formed to cover the first electrode 13.
- the solid electrolyte 14 is formed by sputtering or vapor deposition using lithium phosphate and a simple substance of transition metal element T, a transition metal oxide, or a lithium-containing transition metal oxide. Be done.
- a second electrode 15 which is a negative electrode is formed on solid electrolyte 14 using the negative electrode material as described above.
- each of the first current collector 12, the first electrode 13, the solid electrolyte 14, the second electrode 15, and the second current collector 16 It may be manufactured using a predetermined mask that defines the size and shape of each Further, the all solid battery can also be manufactured using a method other than the thin film manufacturing method under vacuum such as the sputtering method or the vapor deposition method.
- Test cells were manufactured by changing the type of transition metal element T contained in the solid electrolyte. As shown in FIG. 2, this test cell was composed of a silicon substrate 21, a platinum current collector layer 22, a solid electrolyte layer 23 and a platinum current collector layer 24.
- a platinum current collector layer 22 having a thickness of 0.5 m was formed at a predetermined position of the silicon substrate 21 by an rf magnetron sputtering method using platinum as an evening gate.
- a metal mask having a window (20 mm ⁇ 10 mm) was used.
- r f magnetron sputtering was performed for 2 hours on the platinum current collector layer 22 to form a solid electrolyte layer 23 having a thickness of 1.0 m.
- a metal mask with a window size of 15 mm x 15 mm was used.
- altranoic acid and transition metal element T shown in Table 1 were used as targets.
- sputtering gas argon was used.
- the internal pressure of the chamber of the apparatus used was 2. 7 Pa, the gas introduction amount was 10 sccm, and the high frequency power irradiated to lithium orthophosphate lithium target was 200 w.
- the power of the high frequency applied to the transition metal element T set is controlled to The molar ratio of the transition metal element T to the atom was adjusted to be 0.2.
- the composition of the solid electrolyte was made to be L i 2.8 ⁇ 0.2 3.9 3.9.
- a platinum current collector layer having a thickness of 0.5 is obtained.
- 24 were formed to prepare a test cell as shown in FIG.
- a metal mask having a window of 10 mm ⁇ 10 mm in size was used.
- test cells 1 to 17 are referred to as cells 1 to 17, respectively.
- a test cell in which the solid electrolyte did not contain a transition metal element was prepared, and this was used as a comparison cell 1.
- test cell was then stored for 2 weeks in a thermostat at a relative humidity of 50% and a temperature of 20 ° C.
- the equilibrium voltage is zero
- the amplitude of the applied voltage is ⁇ 10 mV
- the frequency range to be used is from 105 Hz to 0.1 Hz.
- the ion conductivity was determined from the result of the AC impedance measurement. The obtained results are shown in Table 1.
- Table 1 the ion conductivity of the cell after storage for 2 weeks is shown as a percentage value to the ion conductivity immediately after the preparation of the test cell.
- Example 1 was repeated except that tungsten (W 2) was used as the transition metal element T and the molar ratio of W to phosphorus atoms was changed as shown in Table 3. Similarly, a test cell was made. The obtained test cells were designated cells 18 to 25 respectively. In addition, as a comparison, a test cell in which the solid electrolyte does not contain tungsten was manufactured, and this was used as a comparison cell 2. The comparison cell 2 is the same as the comparison cell 1.
- the molar ratio of the transition metal element to the phosphorus atom is preferably 0.01 to 0.5.
- test cell When forming a solid electrolyte, a test cell was produced in the same manner as in Example 1 except that transition metal oxides shown in Table 3 were used instead of the transition metal element T alone. The obtained test cells were designated cells 26 to 39, respectively. Table 3 shows the composition of the solid electrolyte in cells 26 to 39. In addition, as a comparison, a test cell in which the solid electrolyte does not contain a transition metal oxide was prepared, and this was used as comparison cell 3. The comparison cell 3 is similar to the comparison cell 1 described above.
- test cell When forming a solid electrolyte, a test cell is manufactured in the same manner as in Example 1, except that a lithium-containing transition metal oxide as shown in Table 4 is used instead of a single transition metal element T. did.
- the test cells obtained in this manner are referred to as cells 40 to 48, respectively.
- the composition of the solid electrolyte in cells 40 to 48 is shown in Table 4.
- a test cell in which the solid electrolyte does not contain a lithium transition metal oxide was prepared, and this was used as a comparison cell 4.
- the comparison cell 4 is the same as the comparison cell 1.
- lithium tungstate (Li 2 W 0 4), which is a lithium-containing transition metal oxide, is used instead of the simple substance of transition metal element T.
- a test cell was prepared in the same manner as in Example 1 except that the molar ratio of tungsten to phosphorus atom (P 2) was changed as shown in Table 5.
- the test cells obtained in this manner are referred to as cells 49 to 54, respectively.
- the cell 51 is the same as the cell 48 of the fourth embodiment.
- the ion conductivity of each of these cells was measured in the same manner as in Example 1. The obtained results are shown in Table 12.
- Table 5 Table 5
- test cell as shown in FIG. 3 was produced.
- This test cell was composed of a silicon substrate 31, a platinum current collector layer 3, a solid electrolyte layer 33, and a lithium metal layer 34.
- This test cell is the same as Example 5 except that in place of the platinum current collector layer 24 of the test cell shown in FIG. 2, Li metal layer 34 is formed by resistance heating evaporation. Made.
- the test cells obtained in this way are And cells 5 5 to 6 0.
- the obtained cell was stored for 2 weeks in a constant temperature bath at 20 ° C. installed in a part under a dry air environment with a dew point temperature of 40 ° C.
- the state of the Li metal layer of these cells after storage was visually observed. Table 6 shows the results.
- the molar ratio of transition metal element T to phosphorus atom is 0.0 1
- An all solid battery containing a solid electrolyte consisting of lithium phosphate and a transition metal element was produced.
- an all solid state battery as shown in FIG. 1 was produced.
- the first electrode was a positive electrode
- the second electrode was a negative electrode.
- the first current collector layer 12 made of platinum was formed on the silicon substrate 11 by the r f magnetron sputtering method.
- the silicon substrate 1 a substrate which was surface-oxidized and mirror-polished and whose surface roughness was 3 O nm or less was used.
- a metal mask having a window (20 mm ⁇ 12 mm) was used.
- the thickness of the platinum current collector layer 12 was set to 0.5 m.
- r f magnificum passing was carried out for 2 hours using lithium cobalt oxide (Li 2 CO 2) as a getter.
- a first electrode layer 13 made of lithium cobaltate was formed as a positive electrode on the platinum current collector layer 12.
- a metal mask having a window size of 10 mm ⁇ 10 mm was used.
- the thickness of the first electrode layer 13 is set to 1 m.
- the internal pressure of the chamber's chamber is 2. 7 Pa.
- the sputtering gas a mixed gas of argon and oxygen was used, and the gas introduction amount was set to 7.5 scm and 2.5 scm, respectively.
- the power of the high frequency applied to lithium cobaltate powder was set to 200 W.
- a solid electrolyte layer 14 with a thickness of 1 m was fabricated on the first electrode layer 13 by performing r- magnetron sputtering for 2 hours. At this time, a metal mask having a dimension of 15 mm ⁇ 15 mm was used.
- rf magnetron sputtering two types were used as a set for rf magnetron sputtering.
- argon (A r) was used as the sputtering gas.
- the pressure in the chamber of the apparatus was set to 2. 7 Pa, the gas introduction amount was set to 10 sccm, and the high frequency power irradiated to the lithium orthophosphate target was set to 200 W.
- the power of the high frequency applied to the tungsten target was controlled so that the molar ratio of tungsten to phosphorus atoms was 0.2.
- a second electrode layer 15 which is a negative electrode was formed on the solid electrolyte layer 14 by resistance heating evaporation. At this time, the dimensions of the window are
- a metal mask of 1 OmmX 1 Omm was used.
- the thickness of the second electrode layer 15 is set to 0.5 m.
- a second current collector layer 1 6 having a thickness of 1.0 iim is formed to completely cover the second electrode layer 15 by an rf magnetron sputtering method.
- a metal mask having a window size of 2O mm ⁇ 12 mm was used.
- the formed second current collector layer 16 and the first current collector layer 12 were prevented from coming in contact with each other.
- the test battery obtained in this manner is referred to as Battery 1.
- Comparative Battery 1 a test battery in which the solid electrolyte consists only of lithium phosphate was manufactured, and this battery was referred to as Comparative Battery 1.
- the moisture resistance of the obtained battery 1 and the comparative battery 1 was evaluated.
- these batteries were stored for 2 weeks in a thermostat at a relative humidity of 50% and a temperature of 20 ° C.
- the AC impedances of the battery 1 and the comparative battery 1 were measured.
- the equilibrium voltage is zero, the amplitude of the applied voltage and ⁇ 1 0 mV, was also the frequency region used from 1 0 5 H z to 0. 1 H z.
- the composition of the solid electrolyte is formed using lithium transition metal oxide (Li 2 W 4 4) which is a lithium-containing transition metal oxide.
- a test battery was produced in the same manner as in Example 7 except that Li 3.66 P WO. 33 O 5.32 was used.
- the test batteries obtained in this manner were named batteries 2 to 4, respectively.
- the all-solid-state battery using the solid electrolyte of the present invention can suppress deterioration of its electrochemical characteristics, for example, charge and discharge rate characteristics, even when it is in a wet atmosphere.
- solid electrolyte whose ion conductivity is maintained high even when used under a wet atmosphere.
- Such solid electrolytes can be used as solid electrolytes for all solid state batteries.
Abstract
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US10/551,935 US7514181B2 (en) | 2003-04-18 | 2004-04-15 | Solid electrolyte and all solid state battery containing same |
EP04727754A EP1630893B1 (en) | 2003-04-18 | 2004-04-15 | Solid electrolyte and all-solid cell containing same |
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JP2003113850 | 2003-04-18 | ||
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EP (1) | EP1630893B1 (ja) |
JP (1) | JP3690684B2 (ja) |
KR (1) | KR100649849B1 (ja) |
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WO2006092747A1 (en) * | 2005-03-03 | 2006-09-08 | Koninklijke Philips Electronics N.V. | Method of manufacturing an electrochemical energy source, electrochemical energy source thus obtained and electronic device |
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JP2007103129A (ja) * | 2005-10-03 | 2007-04-19 | Geomatec Co Ltd | 薄膜固体二次電池および薄膜固体二次電池の製造方法 |
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- 2004-04-15 US US10/551,935 patent/US7514181B2/en active Active
- 2004-04-15 WO PCT/JP2004/005424 patent/WO2004093236A1/ja active Application Filing
- 2004-04-15 KR KR1020057017726A patent/KR100649849B1/ko active IP Right Grant
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Also Published As
Publication number | Publication date |
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CN100337362C (zh) | 2007-09-12 |
CN1751409A (zh) | 2006-03-22 |
KR100649849B1 (ko) | 2006-11-28 |
KR20050118200A (ko) | 2005-12-15 |
US20060216611A1 (en) | 2006-09-28 |
EP1630893A4 (en) | 2007-07-18 |
EP1630893A1 (en) | 2006-03-01 |
JP3690684B2 (ja) | 2005-08-31 |
EP1630893B1 (en) | 2012-04-04 |
JP2004335455A (ja) | 2004-11-25 |
US7514181B2 (en) | 2009-04-07 |
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