| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a gas diffusion layer of a solid polymer type fuel cell capable of stably carrying out sufficient smoothing of a gas diffusion layer surface on the side adjacent to a catalyst layer, and thereby allowing a stable long-time continuous operation of the fuel cell. <P>SOLUTION: In this manufacturing method of the gas diffusion layer of the solid polymer type fuel cell provided with the catalyst layers disposed on both principal surfaces by interposing a solid polymer electrolyte film, and the porous gas diffusion layers disposed on both outer sides of the catalyst layer, each gas diffusion layer is formed of a conductive porous base material such as carbon paper or carbon cloth; the base material is formed into a predetermined size; thereafter the base material surface on the side adjacent to the catalyst layer is smoothed by arc heat of discharge. For instance, the base material 11 is used as a positive electrode; a graphite electrode 15 is used as a negative electrode; a pulse voltage is applied between both the electrodes in a working solution 16 from an arc generator 17; and thereby the arc heat of discharge is generated to smooth the base material surface by melting carbon fibers projecting rom the base material surface. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
