| 摘要 |
PURPOSE:To advance electrochemical corrosion reaction of carbon and to prevent decrease in the surface area caused by aggregation of noble metal catalyst to retain stable three phase interface over a long period of time by adding noble metal non-supporting carbon powder to an electrode catalyst layer. CONSTITUTION:Electrodes comprising porous carbon paper 2, 4 supported with electrode catalysts 1, 3 are arranged on both sides of an electrolyte layer 5, and a bipolar separating plate 6 having fuel gas and oxidizing agent gas supply grooves 7, 8 is arranged in the outside of each electrode. They are stacked to form a phosphric acid electrolyte fuel cell. In the cell, noble metal non- supporting carbon powder is added to the electrode catalyst layers 1, 3. Thereby, decrease in cell voltage of the fuel cell does not appear and high voltage is retained even after long continuous operation. |
