All solid state battery

Patent metadata

Field	Value
Publication number	US-12347846-B2
Application number	US-202318372451-A
Country	US
Kind code	B2
Filing date	Sep 25, 2023
Priority date	Dec 11, 2020
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A main object of the present disclosure is to provide a car having an all solid state battery with excellent capacity durability when restraining pressure is not applied or even when low restraining pressure is applied thereto. The present disclosure achieves the object by providing an all solid state battery comprising layers in the order of a cathode layer, a solid electrolyte layer, and an anode layer; wherein the anode layer contains an anode active material including a silicon clathrate II type crystal phase; restraining pressure of 0 MPa or more and less than 5 MPa is applied to the all solid state battery in a layering direction; and a specific surface area of the anode active material is 8 m 2 /g or more and 17 m 2 /g or less.

First claim

What is claimed is:

1. A car having an all solid state battery comprising layers in the order of a cathode layer, a solid electrolyte layer, and an anode layer; wherein
the anode layer contains an anode active material including a silicon clathrate II type crystal phase;
restraining pressure of 0 MPa or more and less than 5 MPa is applied to the all solid state battery in a layering direction;
a specific surface area of the anode active material is 8 m 2 /g or more and 17 m 2 /g or less; and
an average particle size of a primary particle of the anode active material is 50 nm or more and 3000 nm or less.

2. The car according to claim 1 , wherein the restraining pressure is 2.5 MPa or less.

3. The car according to claim 1 , wherein the specific surface area is 9.1 m 2 /g or more and 15.1 m 2 /g or less.

4. The car according to claim 1 , wherein the all solid state battery does not include a restraining jig that applies the restraining pressure.

5. The car according to claim 1 , wherein, when an X-ray diffraction measurement using a CuKα ray is conducted to the anode active material, peaks are observed at positions of 2θ=20.09°±0.50° and 31.72°±0.50°.

Assignees

• Toyota Motor Co Ltd

Inventors

• Otaki Mitsutoshi
• Yoshida Jun

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0562

  Solid materials · CPC title