摘要 |
PURPOSE:To concurrently meet high energy density, low self discharge, high charge-discharge efficiency, and long cycle life by using an oxidation copolymer of aniline compound containing a specified heterocyclic compound and heterocyclic compound in a positive electrode. CONSTITUTION:In a nonaqueous secondary battery mainly comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte, an oxidation copolymer of aniline family compound containing 1-50mol% of at least one compound selected from heterocyclic compounds indicated in the formulas (a)-(e) and heterocyclic compound is used as the positive electrode. The content of thiophene compound, pyrrole compound, furan compound, or these mixture in the oxidation copolymer is 1-50mol%, preferably 1-30mol%. When the content is less than 1mol%, the effect of copolymer is not obtained and the battery performance is not improved. When the content exceeds 50mol%, the doping rate is decreased and the battery performance is also decreased. |