All-solid-state battery

Patent metadata

Field	Value
Publication number	US-12255335-B2
Application number	US-202418617829-A
Country	US
Kind code	B2
Filing date	Mar 27, 2024
Priority date	Mar 12, 2021
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

Provided is an all-solid-state battery capable of suppressing a rise in the resistance increase ratio thereof. The all-solid-state battery includes an anode active material layer containing an alloy-based active material, a first fibrous carbon, and a second fibrous carbon, wherein when a fiber diameter of the first fibrous carbon is defined as A, and a fiber diameter of the second fibrous carbon is defined as B, the ratio of A to B is 10 to 300, and when the proportion (wt %) of the first fibrous carbon to the alloy-based active material is defined as X, and the proportion (wt %) of the second fibrous carbon to the alloy-based active material is defined as Y, the proportion ({Y/(X+Y)}×100%) of the contained second fibrous carbon to a total of the first fibrous carbon and the second fibrous carbon is 0.5% to 10%.

First claim

What is claimed is:

1. An all-solid-state battery comprising:
a cathode active material layer,
a sulfide solid electrolyte, and

an anode active material layer containing an alloy-based active material, a first fibrous carbon, and
a second fibrous carbon, wherein
when a fiber diameter of the first fibrous carbon is defined as A, and a fiber diameter of the second fibrous carbon is defined as B, a ratio of A to B is 10 to 300, wherein A is from 50 nm to 300 nm and B is from 1 nm to 10 nm, and
when a proportion (wt %) of the first fibrous carbon to the alloy-based active material is defined as X, and a proportion (wt %) of the second fibrous carbon to the alloy-based active material is defined as Y, a proportion ({Y/(X+Y)}×100%) of the contained second fibrous carbon to a total of the first fibrous carbon and the second fibrous carbon is 0.5% to 10%, the alloy-based anode active material has a particle size of 0.4 μm to 4.0 μm.

2. The all-solid-state battery of claim 1 , wherein X is from 1 wt % to 20 wt %.

3. The all-solid state battery of claim 1 , wherein Y is from 0.05 wt % to 0.2 wt %.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kawashima Shohei

Classifications

• H01M10/052 Primary

  Li-accumulators · CPC title

• H01M2004/021

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

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/38

  of elements or alloys · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title