Method for producing electrodes for all-solid battery and method for producing all-solid battery
Disclosed herein is a method for producing an electrode includes a step of reducing lithium-vanadium oxide by heating in reducing gas, a step of causing the reduced lithium-vanadium oxide to deliquesce, a step of mixing the deliquesced lithium oxide with an active material so as to prepare an electrode mixture, and a step of making the electrode mixture into an electrode by virtue of molding after heat treatment to the electrode mixture. The method for producing an all-solid battery further includes a step of bonding the thus-made electrode to a solid electrode layer in such a way that the solid electrode layer is interposed between the electrode and either of cathode and anode to be paired with the electrode.
1. A method for producing an electrode for an all-solid battery, the method comprising:
a step of reducing a lithium-vanadium oxide by heating the oxide inside a reducing gas;
a step of causing the reduced lithium-vanadium oxide to deliquesce;
a step of mixing the deliquesced lithium-vanadium oxide with an active material so as to prepare an electrode mixture; and
a step of making the electrode mixture into an electrode by virtue of molding after heat treatment to the electrode mixture.
2. The method of claim 1 , wherein the reducing gas includes at least one species selected from hydrogen gas and ammonia gas.
3. The method of claim 1 , wherein the step of reducing the lithium-vanadium oxide is performed at a temperature of 200° C. or higher.
4. The method of claim 1 , wherein the step of causing the lithium-vanadium oxide to deliquesce is preceded by a step of heating the reduced lithium-vanadium oxide in the air at a temperature of 500° C. or lower.
5. The method of claim 1 , wherein the step of reducing the lithium-vanadium oxide is preceded by a step of mixing the lithium-vanadium oxide with an organic solvent.
6. The method of claim 5 , wherein the organic solvent includes at least one species selected from N-methylpyrrolidone and acetonitrile.
7. The method of claim 1 , wherein the lithium-vanadium oxide includes at least one species selected from Li 4 V 10 O 27 , Li 1.5 V 2 O 4 , Li 0.9 V 2 O 4 , Li 3 VO 4 , LiV 2 O 5 , Li 1.11 V 3 O 7.89 , LiVO 2 , Li 6.1 V 3 O 8 , LiV 2 O 4 , Li 0.2 V 1.16 O 2 , Li 0.19 VO 2 , LiV 3 O 8 , and LiVO 3 .
8. A method for producing an all-solid battery, the method comprising:
a step of reducing a lithium-vanadium oxide by heating the oxide in a reducing gas;
a step of causing the reduced lithium-vanadium oxide to deliquesce;
a step of mixing the deliquesced lithium-vanadium oxide with an active material so as to prepare an electrode mixture;
a step of making the electrode mixture into an electrode by virtue of molding after heat treatment to the electrode mixture; and
a step of bonding the thus-made electrode to a solid electrode layer in such a way that the solid electrode layer is interposed between the electrode and either of cathode and anode to be paired with the electrode.
9. The method of claim 8 , wherein the reducing gas includes at least one species selected from hydrogen gas and ammonia gas.
10. The method of claim 8 , wherein the step of reducing the lithium-vanadium oxide is performed at a temperature of 200° C. or higher.
11. The method of claim 8 , wherein the step of causing the lithium-vanadium oxide to deliquesce is preceded by a step of heating the reduced lithium-vanadium oxide in the air at a temperature of 500° C. or lower.
12. The method of claim 8 , wherein the step of reducing the lithium-vanadium oxide is preceded by a step of mixing the lithium-vanadium oxide with an organic solvent.
13. The method of claim 12 , wherein the organic solvent includes at least one species selected from N-methylpyrrolidone and acetonitrile.
14. The method of claim 8 , wherein the lithium-vanadium oxide includes at least one species selected from Li 4 V 10 O 27 , Li 1.5 V 2 O 4 , Li 0.9 V 2 O 4 , Li 3 VO 4 , LiV 2 O 5 , Li 1.11 V 3 O 7.89 , LiVO 2 , Li 6.1 V 3 O 8 , LiV 2 O 4 , Li 0.2 V 1.16 O 2 , Li 0.19 VO 2 , LiV 3 O 8 , and LiVO 3 .