| 摘要 |
PURPOSE:To maintain uniform clamping pressure and small contact resistance throughout an operation period by adding a small amount of phenol resin to the catalytic layer side of an electrode base board, while adding a large amount of phenol resin to the rib side, while the resin being further graphitized by thermal decomposition of resin. CONSTITUTION:Carbon textile cloth having both heat resistance and phosphoric acid resistance is immersed in an alkohol solution having phenol resin concentration of 60- 70wt% up to about a half of its thickness. While being dried followed by being heated for several hours in the nitrogen atmosphere being subjected to thermal decomposition of phenol resin, the generated carbon is graphitized. Next, the opposite face is immersed in an alcohol solution having phenol resin concentration of 10-15wt% up to about a half of its thickness, followed by being dried and further being fired for several hours. The region A immersed in a phoenol resin solution of 10-15wt% plays the role of a cushion. Further, the phenol resin 11 packed in gaps of the carbon fiber 9 is graphitized so as to remarkably reduce the natural electric resistance of an electrode. An electrode base board with ribs can be obtained by performing a cutting process on ribs in the region B. |
