Lithium battery

Patent metadata

Field	Value
Publication number	US-2016218399-A1
Application number	US-201415025485-A
Country	US
Kind code	A1
Filing date	Oct 21, 2014
Priority date	Oct 31, 2013
Publication date	Jul 28, 2016
Grant date	—

Abstract

A lithium battery including a positive electrode, a negative electrode containing lithium, and a non-aqueous electrolyte having lithium ion conductivity. The positive electrode includes at least one of a manganese oxide and a fluorinated graphite. A powdery or fibrous carbon material adheres to at least part of a surface of the negative electrode, the surface facing the positive electrode. The non-aqueous electrolyte includes a non-aqueous solvent, a solute, and an additive. The solute includes LiclO 4 , and the additive is LiBF 4 . The ratio of LiBF 4 is, for example, 1 to 100 parts by mass, relative to 100 parts by mass of the solute.

First claim

1 . A lithium battery comprising a positive electrode, a negative electrode containing lithium, and a non-aqueous electrolyte having lithium ion conductivity, wherein
the positive electrode includes at least one selected from the group consisting of a manganese oxide and a fluorinated graphite, a powdery or fibrous carbon material adheres to at least part of a surface of the negative electrode, the surface facing the positive electrode, the non-aqueous electrolyte includes a non-aqueous solvent, a solute, and an additive, the solute includes LiClO 4 , and the additive is LiBF 4 .

2 . The lithium battery of claim 1 , wherein a ratio of LiBF 4 is 1 to 100 parts by mass, relative to 100 parts by mass of the solute.

3 . The lithium battery of claim 1 , wherein the non-aqueous solvent includes a cyclic carbonic acid ester and a chain ether.

4 . The lithium battery of claim 3 , wherein
the cyclic carbonic acid ester includes propylene carbonate, the chain ether includes dimethoxymethane, and the non-aqueous electrolyte contains propylene carbonate and dimethoxymethane in a proportion of 40 to 98 mass %.

5 . The lithium battery of claim 1 , wherein the positive electrode and the negative electrode are both in a disc shape.

6 . The lithium battery of claim 1 , wherein the non-aqueous electrolyte contains LiBF 4 in a proportion of 1 to 5 mass %.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Mizuta Touta
• Kawaguchi Shinichi
• Uyama Takao

Classifications

• H01M10/4235 Primary

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M10/0525

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

• H01M4/366 Primary

  as layered products · CPC title

• H01M2004/025

  with shapes other than plane or cylindrical · CPC title