| 摘要 |
PURPOSE: To provide an electrode for fuel cell having sufficient gas permeability and conductivity and a method for manufacturing it. CONSTITUTION: A catalyst-carried carbon C carrying a catalyst P and a water- soluble staple F approximately constant in diameter formed of polyvinyl alcohol are dispersed in a solution of polymer electrolyte N, pasted and formed into a sheet followed by drying, and the resulting sheet member is then dipped in a hot water to elute the staple F, whereby a catalyst electrode 14 is completed. The catalyst electrode 14 has a plurality of pores S approximately constant in diameter as the eluting trace of the staple F. Since the gas permeability of the electrode depends on the diameter of the pore, assuming that the gas permeability is constant, the space occupied by the pores S formed in the inner part can be minimized in the catalyst electrode 14, compared with an electrode having pores formed by use of a granular pore making agent, so that the conductive area is increased and the performance of a fuel cell can be improved. |
