All solid state battery

Patent metadata

Field	Value
Publication number	US-12322751-B2
Application number	US-202217725153-A
Country	US
Kind code	B2
Filing date	Apr 20, 2022
Priority date	Apr 27, 2021
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

A main object of the present disclosure is to provide an all solid state battery in which occurrence of short circuit is inhibited. The present disclosure achieves the object by providing an all solid state battery comprising an anode including at least an anode current collector, a cathode, and a solid electrolyte layer arranged between the anode and the cathode; wherein a protective layer containing a Mg-containing particle that contains at least Mg, and also containing a polymer, is arranged between the anode current collector and the solid electrolyte layer; the solid electrolyte layer contains a solid electrolyte in a granular shape; and when X designates an average particle size D 50 of the solid electrolyte and Y designates an average thickness of the solid electrolyte layer, X/Y is 0.0125 or more and 0.02 or less.

First claim

What is claimed is:

1. An all solid state battery comprising an anode including at least an anode current collector, a cathode, and a solid electrolyte layer arranged between the anode and the cathode; wherein
a protective layer containing a Mg-containing particle that contains at least Mg, and also containing a polymer, is arranged between the anode current collector and the solid electrolyte layer;
the solid electrolyte layer contains a solid electrolyte in a granular shape; and
when X designates an average particle size D 50 of the solid electrolyte and Y designates an average thickness of the solid electrolyte layer, X/Y is 0.0125 or more and 0.02 or less.

2. The all solid state battery of claim 1 , wherein X/Y is 0.0163 or more and 0.02 or less.

3. The all solid state battery of claim 1 , wherein the Mg-containing particle is a simple substance of Mg.

4. The all solid state battery of claim 1 , wherein the solid electrolyte is a sulfide solid electrolyte.

Assignees

• Toyota Motor Co Ltd

Inventors

• Li Ximeng
• Sato Masumi
• Kaneko Sakina
• Matsunaga Tomoya
• Yubuchi So
• Otaki Mitsutoshi
• Nishimura Hideaki
• Wakasugi Satoshi
• Kawashima Shohei
• Yoshida Jun

Classifications

• H01M50/446

  Composite material consisting of a mixture of organic and inorganic materials · CPC title

• H01M50/586

  inside the batteries, e.g. incorrect connections of electrodes · CPC title

• H01M50/474

  characterised by their position inside the cells · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M10/0525

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