- POROUS ELECTRODE BASE MATERIAL PROCESS FOR PRODUCTION THEREOF PRECURSOR SHEET FILM-ELECTRODE ASSEMBLY AND SOLID POLYMER FUEL CELL

摘要

Provided is a porous electrode base having a high sheet strength, low manufacturing cost, good handling property, high thickness precision and surface smoothness, and sufficient gas permeability and conductivity. Wherein the short carbon fibers (A) dispersed in the three-dimensional structure are joined together by the three-dimensional network carbon fibers (B). (1) of producing a precursor sheet in which a short carbon fiber (A), a carbon fiber precursor short fiber (b) and / or a fibrillar carbon precursor fiber (b ') are dispersed in a two-dimensional plane, A step (2) of forming a three-dimensionally entangled structure, and a step (3) of carbonizing the sheet at 1000 ° C or higher. (4) of heating and pressing the sheet at a temperature lower than 200 占 폚 and a step (4) between the step (2) and the step (3) Deg.] C or lower.