| 摘要 |
PURPOSE:To obtain a three-layered cylindrical air electrode having an excellent liquid-leakage resistance and can be manufactured easily by using a sheet of an ethylene-fluoride propylene ether polymer as a water repellent sheet contained in the electrode. CONSTITUTION:In a three-layered cylindrical air electrode consisting of a cylindrical metallic current collector sheet 1, a catalyst layer sheet 2 affixed to the outer surface of the sheet 1 and a water repellent sheet 3 affixed to the outer surface of the sheet 2, the water repellent sheet 3 is formed by the use of an ethylene-fluoride propylene ether polymer. The above polymer is solid at ordinary temperature, has a melting point of 290-300 deg.C and can be subjected to heat sealing. Therefore for instance, the polymer sheet 3 is wound around the entire outer surface of a two-layered cylinder, formed by unifying the metallic current collector sheet 1 and the catalyst layer sheet 2, while heating and pressing the sheet 3 so as to fuse it to the outer surface of the cylindrical catalyst layer sheet 2, thereby obtaining a three-layered air electrode. |
