| 摘要 |
PURPOSE:To obtain a polymer solid electrolyte having high ion conductivity at room temperature by using a polyethylene oxide comprising a mixture of high molecular weight PEO and low molecular weight PEO. CONSTITUTION:In a complex comprising polyethylene oxide and alkali metal salt, polyethylene oxide comprising a mixture of high molecular weight PEO having a molecular weight of 10,000 or more and low molecular weight PEO having a molecular weight of 1,000 or less is used. For example, PEO having a mean molecular weight of 6000,00 and PEO having a mean molecular weight of 1,000 and LiCF3SO4 powder are weighed so as to obtain a desired composi tion, and dissolved in acetonitrile and CH3CN and stirred for 48hr with a mag netic stirrer. The ratio of PEO (600,000) to PEO (1,000) is 5:1, and the concentra tion of acetonitrile is 4wt%. The solution is casted on a substrate, and the solvent is gradually vaporized with nitrogen gas flowing, then the mixture is heated under vacuum at 150 deg.C for 24hr to completely remove the solvent. |
