| 摘要 |
PURPOSE:To obtain a battery having low self discharge rate by synthesizing a polypyrrole composite film which has high electric conductivity, high mechanical strength, and low self discharge in water-based polymerization solution, and using the film in an electrode. CONSTITUTION:Nickel plates are immersed in a specified amount of water-based polymerization solution prepared by dissolving, for example, pyrrole and p- toluene sodium sulfonate in purified water and dc voltage is applied across the nickel plates to synthesize a polypyrrole film. The polypyrrole film is immersed in acetonitrile containing a specified amount of (n-C4H9)4N.BF4 and undoped by using silver as a reference electrode. The undoped film is redoped with BF<->4, then immersed in acetonitrile containing (n-C4H9)4N.BF4 and pyrrole, and anodically electrolyzed to form a polypyrrole composite film. A battery using the polypyrrole composite film in an electrode has a low self discharge rate such as 30% for four months. |
