Patent ID: 6274276
Filing Date: 2001-08-14
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
An organic electrolyte electrochemical system including a polymeric separator comprising:a) an elastomeric polymer selected from the group consisting of an acrylonitrile-butadiene copolymer, a styrene-butadiene-styrene copolymer, a styrene-isoprene-styrene copolymer, polyesters and block amid polyethers; andb) a polymer which swells in an organic electrolyte selected from the group consisting of polyvinylidene fluoride and its copolymers, polymethylmethacrylate, polyvinylformal, polybutylmethacrylate and polyvinyl chloride, and with which said elastomeric polymer forms an alloy, said polymeric separator having a microporous structure with a porosity in the range 30% to 95% and pores with an average diameter in the range 0.1 .mu.m to 5 .mu.m.