| 摘要 |
PURPOSE:To prevent vapor and carbon dioxide gas in the atmosphere from intruding into a battery for a long period of time by interposing a film, which is formed from trimethyl-vinyl silane by means of plasma polymerization, and a complex film consisting of porous film supporting this film between the air intake side of a gas diffusion electrode and the internal surface of a battery jar. CONSTITUTION:A complex film 11 obtained by consolidating a fine porous film with a film formed from trimethyl-vinyl silane through plasma polymerization is interposed between a porous film 2 of PTFE and a porous substance 4 making diffusion of oxygen in such a way that the plasma polymerization film side of trimethyl-vinyl silane faces an air intake hole 3. A battery using a complex film in such a constitution excels in both the heavy load and light load characteristics and had good response to varying outside atmosphere. Particularly the plasma polymerization film shall favorably be of 0.3-0.5mum thick, and an alkali resistant porous film be preferably used as a support. |
