Patent ID: 6203941
Filing Date: 2001-03-20
Classification: H01M,Y10T

Abstract:
A battery comprising:first and second electrodes;an alkaline electrolyte; andand an ionically conductive separator disposed between the electrodes, said separator formed by applying a coating composition to the surface of at least one of the electrodes and solidifying material contained in the coating composition, said coating composition comprising a polar solvent, kappa-carrageenan, hydroxyethyl cellulose, divinylsulfone cross-linking agent and fiber, wherein the weight ratio of hydroxyethyl cellulose to kappa-carrageenan is from about 1:3 to about 3:1, the amount of cross-linking agent is from about 0.05 to about 2% of the weight of the composition, the amount of hydroxyethyl cellulose and kappa-carrageenan is from about 1% to about 10% by weight of the composition, and the amount of fiber is from about 3% to about 50% of the weight of the composition.