| 摘要 |
PURPOSE:To improve cell characteristic by forming a reaction layer of gas diffusion electrode with a part having a high water repellency and gas diffusion characteristic and a part which allows easy penetration of electrolyte containing catalyst particle forming body disposed uniformly in the thickness direction. CONSTITUTION:A water repellent layer 3 coated with carbon fine powder in the alcohol with addition of fluorine resin powder is provided on a porous electrode base 2, and this layer is further provided with a part 5 having a high water repellency and gas diffusion characteristic with addition of carbon catalyst powder holding platinum in the alcohol, a large amount of fluorine powder and bore forming agent and a part 4 having affinity which allows easy penetration of electrolyte including catalyst particle body 8 formed from the catalyst powder holding the platinum, etc. disposed equally and continuously in the thickness direction to form the gas diffusion electrode 1 for fuel cell as the reaction layer 6. Accordingly, many three-phase interfaces can be formed on the reaction layer 6 and thereby cell characteristic and operation life characteristic can be improved. |
