Patent ID: 6746982
Filing Date: 2004-06-08
Classification: C04B,H01M,Y02E,Y02P

Abstract:
A porous carbon body having an electronically conductive hydrophilic agent for use in an electrochemical cell, the body comprising:a. an electronically conductive graphite powder in an amount of between 67%-87% by weight of the body; b. a thermoset binder in an amount of between 6%-18% by weight of the body; and, c. a modified carbon black electronically conductive hydrophilic agent in an amount of between 2%-20% by weight of the body, the modified carbon black being carbon having attached at least one organic group, the organic group comprising i.) at least one aromatic group or a C1-C12 alkyl group, and ii.) at least one ionic group, one ionizable group, or a mixture of an ionic group and an ionizable group wherein the ionic or the ionizable group is a sulfonic acid or a salt thereof, wherein the at least one aromatic group or C1-C12 alkyl of the organic group is directly attached to the carbon, and the organic group is present at a level of from about 0.10 to about 4.0 micromoles/m2 of the carbon used based on the nitrogen surface area of the carbon.