| 摘要 |
PURPOSE:To provide a gas diffusion electrode for fuel battery which assures good contactness between electrode catalyst layer and electrolyte at the time of forming battery and forms and maintain a good reactive interface between them by adding a hydrophilic carbon powder to a catalyst black mix. CONSTITUTION:As a carbon powder which supports noble metal powder such as platinum or platinum group element used as the catalyst, a hydrophilic carbon powder is used together with the graphitized carbon powder used existingly. On the occasion of manufacturing gas diffusion electrode using such carbon powder, the powder of platinum or platinum group metral of 5-15wt% is added and mixed with the graphitized carbon powder. Moreover, the hydropholic carbon powder in the amount mentioned above is added thereto. Next, adequate amount of water is also added thereto and they are mixed and stirred sufficiently so that fine inside of carbon powder is sufficiently wet. A dispersion of flurine resin used as the binding agent is added and mixed while they are stirred and thereby a catalyst black mix can be obtained. Such black mix is applied the porous substrate and is baked. Thereafter, wanted gas diffusion electrode can be obtained. |
