| 摘要 |
PURPOSE: To provide an excellent dischargable temperature range, facilitate the handing, and improve the safety by dissolving an electrolyte to a specified nonaqueous solvent. CONSTITUTION: An electrolyte consisting of lithium hexafluorophosphate is dissolved to a nonaqueous solvent consisting of one or more kinds selected from carbonate compounds of the formulae I-III (wherein R1-12 represents H or methyl) having a moisture content not more than 200ppm; and not more than 70% by volume of one or more kinds selected from carbonate compounds of the formulae IV-VI (wherein R13-18 represents H or C1-4 alkyl; R19-20 represents C1-4 alkyl) as occasion demands so as to be 0.5-1.5 mole/l to provide a nonaqueous electrolyte. |
