Solid electrolyte material and battery

1. A solid electrolyte material comprising:

Li, Y, Br, and Cl,

wherein

in an X-ray diffraction pattern in which Cu-Kα is used as a radiation source, peaks are present within all ranges of diffraction angles 2θ of 15.1° to 15.8°, 27.3° to 29.5°, 30.1° to 31.1°, 32.0° to 33.7°, 39.0° to 40.6°, and 47.0° to 48.5°.

2. The solid electrolyte material according to claim 1 , wherein

in the X-ray diffraction pattern in which the Cu-Kα is used as the radiation source, the peaks are present within all ranges of the diffraction angles 2θ of 15.4° to 15.8°, 28.6° to 29.5° 30.6° to 31.1, 32.9° to 33.5°, 39.9° to 40.6°, and 47.5° to 48.5°.

3. The solid electrolyte material according to claim 1 , further comprising:

I,

wherein

in the X-ray diffraction pattern in which the Cu-Kα is used as the radiation source, the peaks are present within all ranges of the diffraction angles 2θ of 15.1° to 15.7°, 27.3° to 29.4°, 30.1° to 31.1°, 32.0° to 33.7°, 39.0° to 40.5°, and 47.0° to 48.4°.

4. The solid electrolyte material according to claim 1 , wherein

the solid electrolyte material has a crystal structure, and

anion arrangement in the crystal structure has a hexagonal close-packed structure.

5. The solid electrolyte material according to claim 1 , wherein

the solid electrolyte material has a crystal structure represented by a space group P3/m1.

6. The solid electrolyte material according to claim 1 , wherein the solid electrolyte material is represented by Li3YBr6-xClx, wherein 4.5<x<5.5.

7. A battery, comprising:

a positive electrode;

a negative electrode; and

an electrolyte layer provided between the positive electrode and the negative electrode,

wherein

at least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer includes the solid electrolyte material according to claim 1 .