| 摘要 |
PURPOSE:To facilitate adjustment of film thickness by applying electrode catalytic paste to an electrolytic plate by means of screen printing so as to form electrode catalytic layers, and forming the uniform electrode catalytic layers effectively. CONSTITUTION:An electrode/electrolyte joined body 1 is formed of an electrolytic plate 1a and electrode catalytic layers 1b arranged on its both sides, and ion conductive polymer is used as the electrolytic plate. The layers 1b are formed of paste which is obtained by dispersing platinum group metal powder, carbon black or a substance obtained by making platinum group carried by carbon black and so on into ion exchange membrane solution. Though the electrode catalytic paste is applied to the ion exchange membrane 1a by means of screen printing, in the case where plasma etching treatment is carried out on a film 1a before the screen printing, microscopic recesses/projections are formed on the surfaces of the film 1a, so that adhesive strength to electrode catalyst can be improved. Furthermore, by changing roughness of screen mesh, thickness of emulsion and printing conditions according to this method, adjustment of an application quantity can be carried out freely. |
