GAS DIFFUSION ELECTRODE AND POLYELECTROLYTE FUEL CELL USING THIS

摘要

PROBLEM TO BE SOLVED: To resolve a problem of an extensive drop of output voltage due to reduction of a humidifying amount in a polyelectrolyte fuel cell needing to maintain a polyelectrolyte in a wet state and commonly operating the cell while humidifying by using some kind of humidifying means. SOLUTION: Water repellent conductive particles mainly composed of water repellent material such as fluororesin and conductive particles such as carbon are arranged throughout the whole area of a conductive porous electrode base material by impregnation or press filling or the like. The gas diffusion electrode is used in at least one of an anode or cathode of the polyelectrolyte fuel cell.