Cathodic electrode
AssigneeW. R. Grace & Co.
InventorsMenahem Anderman, Steven L. Johnson
Life of this patent
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Abstract
A polymer bonded sheet product suitable for use as a cathodic electrode in a non-aqueous battery system wherein the cathodic electrode is a microporous sheet composed of from 2-30 weight percent polyethylene, 70-98 weight percent of electrically conductive and electrochemically active particulate material and from 0 to 5 weight percent of a plasticizer for the polyethylene.
Claims17
A cathodic electrode suitable for use in a non-aqueous battery system comprising at least one substantially homogeneous, microporous sheet product having a composition of from about 70-98 weight percent of particulate material comprising titanium disulfide having an average particle size of less than about 20 microns with said particulate material having up to about 30 weight percent of a conductive diluent having an average particle size of from 1 to 100 millimicrons, from about 2-30 weight percent of high density polyethylene having a weight average molecular weight of from about 150,000 to 5,000,000 and from 0 to about 5 weight percent of an organic plasticizer for said polyethylene;
- and a current collector composed of a conductive material, said collector being in intimate contact with each of said at least one microporous sheet product.
A substantially homogeneous, microporous sheet product suitable for use in forming a cathodic polymer bonded electrode comprising
- (a) from 70-98 weight percent of particulate material comprising titanium disulfide having an average particle size of less than about 20 microns;
- said particulate material having up to about 30 weight percent of a conductive diluent having an average particle size of from about 1 to 100 millimicrons;
- (b) from about 2-30 weight percent of high density polyethylene having a weight average molecular weight of from about 200,000 to about 5,000,000;
- and
- (c) from 0 to 5 weight percent of an organic plasticizer for said polyethylene;
- said sheet having a void volume of at least about 15 volume percent and capable of exhibiting conductivity of at least about 0.15 reciprocal ohm-cm when placed in an electrical circuit.
Dependencies are inferred from the claim text.