Solid electrolyte material and battery using same

Patent metadata

Field	Value
Publication number	US-2023021952-A1
Application number	US-202217946536-A
Country	US
Kind code	A1
Filing date	Sep 16, 2022
Priority date	Mar 31, 2020
Publication date	Jan 26, 2023
Grant date	—

Abstract

A solid electrolyte material according to the present disclosure is represented by the following composition formula (1), LiaAlbOcXd . . . Formula (1) where values a, b, c, and d are each greater than 0, and X is at least one selected from the group consisting of CI and Br. A battery according to the present disclosure includes a positive electrode, a negative electrode and an electrolyte layer disposed between the positive electrode and the negative electrode. 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 the present disclosure.

First claim

What is claimed is:

1 . A solid electrolyte material being represented by the following composition formula (1),
Li a Al b O c X d . . .  Formula (1)
where values a, b, c, and d are each greater than 0, and X is at least one selected from the group consisting of CI and Br, wherein a mathematical relation d/(c+d)<0.95 is satisfied.

2 . The solid electrolyte material according to claim 1 , wherein
the X includes Cl.

3 . The solid electrolyte material according to claim 1 , wherein
the solid electrolyte material includes a first crystalline phase, and in an X-ray diffraction pattern of the first crystalline phase obtained by X-ray diffraction measurement using a Cu-Ka ray, a peak is present within each of ranges of a diffraction angle 28 from 28° to 32°, from 33° to 37°, and from 48° to 52°.

4 . The solid electrolyte material according to claim 1 , wherein
the solid electrolyte material includes a second crystalline phase, and in an X-ray diffraction pattern of the second crystalline phase obtained by X-ray diffraction measurement using a Cu-Ka ray, at least one peak is present within a range of a diffraction angle 28 from 26° to less than 28.5°, and at least three peaks are present within a range of the diffraction angle 28 from 28.5° to 33°.

5 . The solid electrolyte material according to claim 4 , wherein
in the X-ray diffraction pattern of the second crystalline phase, at least one peak is present within a range of the diffraction angle 28 from 47° to 50°, and at least two peaks are present within a range of the diffraction angle 28 from 17° to 21°.

6 . The solid electrolyte material according to claim 1 , wherein
the solid electrolyte material includes a third crystalline phase, and in an X-ray diffraction pattern of the third crystalline phase obtained by X-ray diffraction measurement using a Cu-Ka ray, at least one peak is present within each of ranges of a diffraction angle 28 from 11.5° to 14°, from 14.5° to 17°, from 23° to 25.5°, and from 29.5° to 33°, and at least two peaks are present within a range of the diffraction angle 28 from 19.5° to 23°.

7 . The solid electrolyte material according to claim 1 , wherein
a mathematical relation b/(a +b)>0.4 is satisfied.

8 . The solid electrolyte material according to claim 1 , wherein
a mathematical relation b/(a +b)<0.95 is satisfied.

9 . The solid electrolyte material according to claim 1 , wherein
a mathematical relation d/(c+d)>0.4 is satisfied.

10 . A battery comprising:
a positive electrode; a negative electrode; and an electrolyte layer disposed 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 .

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Hayashi Yohei
• Ueno Koki
• Ichikawa Kazuhide
• Asano Tetsuya

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2300/008

  Halides · CPC title

• H01B1/08

  oxides · CPC title

• C01F7/64

  Bromides (containing fluorine C01F7/52) · CPC title