| 摘要 |
PURPOSE:To enhance the life time characteristic of the captioned cell, by forming an electrolyte-holding matrix through bonding a compound oxide whose principal ingredients are silicon carbide and phosphoric acid-proof substance by means of a bond. CONSTITUTION:In a fuel cell which is provided with a pair of gas diffusion electrodes 2, 3 and a porous electrolyte-holding matrix 1 which holds phosphoric acid between said electrodes 2, 3, the matrix 1 is formed by bonding a compound oxide whose principal ingredients are silicon carbide and phosphoric acid- proof substance by means of a bond. For instance, 54g of tungsten carbide powder is added to 216g of silicon carbide powder to make a mixture, which is dispersed in 300ml of methanol, this methanol mixture is subjected to ultrasonic irradiation, then agitated and mixed uniformly and thereafter filtered. After this mixture is air-dried, it is added into 190ml of 95% phosphoric acid, then, 62ml of PTFE suspension is added thereinto as a bond and all are agitated and kneaded well. This agitated and kneaded substance is poured between electrodes 2, 3 which are coated with a catalyst and pressed under the pressure of 1kg/ cm<2> in order to produce an elementary electrode. |
