ALL-SOLID-STATE BATTERY

Abstract

An all-solid battery having a high output power, exhibiting high safety, and capable of being produced at a low cost is provided. The all-solid battery (8) includes an internal electrode body (6) having a cathode (1) comprising a cathode material, an anode (2) comprising an anode material, and a solid electrolyte layer (3) comprising a solid electrolyte, the cathode material, the anode material, and the solid electrolyte being phosphoric acid compounds, the internal electrode body (6) being integrated by firing the cathode (1), anode (2), and solid electrolyte layer (3), and the internal electrode body (6) containing water.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial schematic diagram showing one embodiment of an all-solid-state battery according to the present invention.

FIG. 2 is a partial schematic diagram showing another embodiment of an all-solid-state battery according to the present invention.

FIG. 3 is a partial schematic diagram showing still another embodiment of an all-solid-state battery according to the present invention.

FIG. 4 is a chart showing the results of X-ray diffraction measurement (XRD) of an LAGP powder and an LVP powder.

FIG. 5 is a chart showing the results of X-ray diffraction measurement (XRD) of an electrode layer (LVP electrode layer).

FIG. 6 is a graph showing a charge-and-discharge cycle curve of the all-solid-state battery of Comparative Example 1.

FIG. 7 is a graph showing a charge-and-discharge cycle curve of the all-solid-state battery of Example 1.

FIG. 8 is a graph showing a charge-and-discharge cycle curve of the all-solid-state battery of Example 2.

Claims

1. An all-solid-state battery comprising: an internal electrode body having a cathode comprising a cathode material, an anode comprising an anode material, and a solid electrolyte layer containing a solid electrolyte,the cathode material, the anode material, and the solid electrolyte being phosphoric acid compounds, the internal electrode body being integrated by firing the cathode, the anode, and the solid electrolyte layer, and the internal electrode body containing water.

2. The all-solid-state battery according to claim 1, wherein the water content of the internal electrode body is 0.3 to 10 mass %.

3. The all-solid-state battery according to claim 1, further comprising a battery case, in which the internal electrode body is housed after being allowed to stand in a wet atmosphere and/or in which the internal electrode body is housed in a wet atmosphere.

4. The all-solid-state battery according to claim 1, further comprising a battery case, wherein the internal electrode body is housed in the battery case after water is added to the internal electrode body and/or the battery case.

5. The all-solid-state battery according to claim 4, wherein the amount of water added to the internal electrode body and/or the battery case is 0.3 to 5 mass % for 100 mass % of the internal electrode body.

6. The all-solid battery according to claim 1, wherein the cathode material, anode material, and solid electrolyte are cationic conductors having a NASICON structure.

7. The all-solid battery according to claim 1, wherein the cations of the cathode material, anode material, and solid electrolyte are lithium cations.

8. The all-solid battery according to claim 1, wherein the solid electrolyte is included in the positive electrode and/or the negative electrode.