Polyvinylpyridine additives for nonaqueous electrolytes activating lithium rechargeable electrochemical cells

Patent metadata

Field	Value
Publication number	US-8940443-B2
Application number	US-27100208-A
Country	US
Kind code	B2
Filing date	Nov 14, 2008
Priority date	Aug 13, 2008
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

An electrolyte comprising an organic solvent, a lithium salt, and a polymer additive comprised of repeating vinyl units joined to one or more heterocyclic amine moieties is described. The heterocyclic amine contains five to ten ring atoms, inclusive. An electrochemical cell is also disclosed. The preferred cell comprises a negative electrode which intercalates with lithium, a positive electrode comprising an electrode active material which intercalates with lithium, and the electrolyte of the present invention activating the negative and the positive electrodes.

First claim

What is claimed is:

1. An electrolyte for an electrochemical cell, the electrolyte comprising:
a) a linear carbonate mixture of dimethyl carbonate (DMC), diethyl carbonate (DEC), and ethylmethyl carbonate (EMC), wherein by volume percent, DMC is in the range of from about 5% to about 75%; EMC is in the range of from about 5% to about 50%; and DEC is in the range of from about 3% to about 45%;
b) ethylene carbonate (EC) as a cyclic carbonate, wherein the EC is in the range of fro…

Assignees

• Park Chi-Kyun
• Greatbatch Ltd

Inventors

• Park Chi-Kyun

Classifications

• H01M10/052 Primary

  Electricity · mapped topic

• H01M6/168

  Electricity · mapped topic

• H01M10/0567 Primary

  Electricity · mapped topic

• H01M10/0569

  Electricity · mapped topic

• H01M10/0568

  Electricity · mapped topic