| 摘要 |
PURPOSE:To prevent decrease in charge-discharge efficiency and deterioration in storage performance by using a mixture consisting of a straight-chain diether compound as indicated in a specified formula and gamma-butyrolactone as the solvent of an electrolyte. CONSTITUTION:A mixture consisting of a straight-chain diether compound as indicated in the formula (wherein l, m, n each is an integer 1 or more) and gamma-butyrolactone is used as the solvent of an electrolyte. The solvent of anions used as a dopant and the straight-chain diether compound is easily released by the interaction of the straight-chain diether compound and a conductive polymer and anions easily make doping in the conductive polymer. Voltage increase in charging is thereby restrained, and the corrosion of a battery can and a current collector can be prevented, and also the decomposition of the electrolyte, dopant, and conductive polymer, etc., is restrained. In addition, conductive is increased and viscosity is decreased, and anions are easily moved in the electrolyte. Charge-discharge performance and cycle performance are increased in this way. |
