| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymer electrolyte that is superior in chemical stability and having a high ionic conductivity, and to provide a battery using the same. SOLUTION: The polymer electrolyte 23 contains a polymer compound, having a structure polymerizing polyvinyl acetal and an electrolytic liquid containing solvent and electrolyte salt. The solvent contains carbonate, in which a cyclic compound such as ethylene carbonate and a chain compound, such as methyl-carbonate-ethyl are mixed 80 mass% or higher. The mass ratio of the cyclic compound : chain compound in the carbonate is in the range 2:8-5:5. Thereby, a high ionic conductivity can be obtained, and the solubility of polyvinyl acetal can be made high, even if the ratio of carbonate in the solvent is made high. COPYRIGHT: (C)2006,JPO&NCIPI |
