초록 ▼

A porous graphite electrode for a fuel cell is formed by impregnation of a cellulosic filter paper by coating or impregnating with a low coke yield impregnant on the active center area and with a high coke yield impregnant on the edges, followed by curing, baking, and graphitizing the electrode to f

A porous graphite electrode for a fuel cell is formed by impregnation of a cellulosic filter paper by coating or impregnating with a low coke yield impregnant on the active center area and with a high coke yield impregnant on the edges, followed by curing, baking, and graphitizing the electrode to form a monolithic porous graphite electrode base with a dense low porosity area at the edges with a less dense higher porosity center working area.

대표청구항 ▼

An integral monolithic porous graphite electrode having a differential porosity by volume increasing from the perimeter inward to the center of said electrode, wherein the base raw material is a cellulosic filter paper with a nominal thickness of from 0.5 to 5 mm. impregnated with the residue of a l

An integral monolithic porous graphite electrode having a differential porosity by volume increasing from the perimeter inward to the center of said electrode, wherein the base raw material is a cellulosic filter paper with a nominal thickness of from 0.5 to 5 mm. impregnated with the residue of a low coke yield impregnant, and wherein the edge of the electrode is impregnated with the residue of a medium to high coke yield impregnant in an amount effective to reduce the porosity by volume at the perimeter of the electrode to less than about 30%.