Negative electrode material and electrolyte battery using same

Patent metadata

Field	Value
Publication number	US-2019296352-A1
Application number	US-201916353256-A
Country	US
Kind code	A1
Filing date	Mar 14, 2019
Priority date	Mar 26, 2018
Publication date	Sep 26, 2019
Grant date	—

Abstract

One aspect of the invention provides a negative electrode material for use in an electrolyte battery including a negative electrode active material and a coating material disposed on a surface of the negative electrode active material. The coating material is a fluoride ion conductor that includes the elements lead and fluorine.

First claim

What is claimed is:

1 . A negative electrode material for an electrolyte battery, comprising:
a negative electrode active material, and a coating material disposed on a surface of the negative electrode active material, wherein the coating material is a fluoride ion conductor that includes lead and fluorine.

2 . The negative electrode material according to claim I, wherein the fluoride ion conductor includes a solid solution of the following formula (1):
Pb (1-x) Sn x F 2+δ   (1)

wherein x satisfies 0≤x<0.6 and δ is a real number that achieves charge neutrality.

3 . The negative electrode material according to claim 2 , wherein x satisfies 0≤X≤0.2.

4 . The negative electrode material according to claim 1 , wherein the coating material has an average coating thickness of at least 10 nm and up to 100 nm.

5 . The negative electrode material according to claim 1 , wherein a plurality of said coating materials are arranged as dots on a surface of the negative electrode active material.

6 . The negative electrode material according to claim 1 , wherein the negative electrode active material includes a graphitic carbon material.

7 . An electrolyte battery comprising:
a positive electrode, a negative electrode, and an electrolyte, wherein the negative electrode includes a negative electrode material according to claim 1 , and the electrolyte includes a fluorine-containing solvent.

Assignees

• Toyota Motor Co Ltd

Inventors

• Adachi Masaki

Classifications

• H01M10/0525

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

• H01M4/366

  as layered products · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M2004/027

  Negative electrodes · CPC title