Liya Wang

US Patent:

63161427, Nov 13, 2001

Filed:

Mar 31, 1999

Appl. No.:

9/281922

Inventors:

Frank M. Delnick - Norton MA
Alan Iwamoto - Ann Arbor MI
Zhendong Hu - Ann Arbor MI
Liya Wang - Ann Arbor MI

Assignee:

Imra America, Inc. - Ann Arbor MI

International Classification:

H01M 462

US Classification:

429217

Abstract:

Provided are methods of forming an electrode suitable for use in an electrochemical cell, and novel electrodes which can be formed therefrom. The methods involve the steps of: (a) forming an electrode slurry from components comprising a solvent, a polymeric binder material and a solid electrode material, wherein the polymeric binder material is formed by modifying a polyolefin with at least one unsaturated polycarboxylic acid or an anhydride of the acid, chlorinating the modified polyolefin and partially crosslinking carboxyl groups or acid anhydride groups on the chlorinated, modified polyolefin with an epoxy group of a compound which has at least two epoxy groups per molecule; (b) coating the electrode slurry on a substrate; and (c) evaporating the solvent. Also provided are electrochemical cells which include the inventive electrodes. The invention has particular applicability to the manufacture of nonaqueous electrochemical power supplies.