Battery separator and method of producing the same

Details Battery separator and method of producing the same Battery separator and method of producing the same

1980-02-04

1981-06-16

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

429254, 427 35, 156272, 20415911, H01M 216

Patent

active

042738407

ABSTRACT:
A battery separator composed of a composite sheet of film to which a monomer having a hydrophilic or electrolytic group is grafted is disclosed. Said film consists of a first polymeric layer containing a substance capable of catching a metal ion dissolved from a positive or negative active material and a second polymeric layer integrally bonded to either one or both sides of the first polymeric layer and which contains no such substance or contains it in a smaller amount that that contained in said first polymeric layer. Also disclosed is a method of producing a battery separator by irradiating such composite sheet of film with ionizing radiation and immersing the irradiated film in a solution of a monomer containing a hydrophilic or electrolytic group or bringing it into contact with the monomer solution to thereby graft the monomer to the film.

REFERENCES:
patent: 2816154 (1957-12-01), Mendelsohn
patent: 3458362 (1969-07-01), Arms
patent: 4078127 (1978-03-01), Megahed et al.
patent: 4143218 (1979-03-01), Adams et al.
patent: 4192908 (1980-03-01), Himy et al.

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