| 摘要 |
<p>The present invention provide a nonaqueous electrolyte comprising a nonaqueous solvent and an electrolyte which is dissolved in the nonaqueous solvent, wherein the nonaqueous solvent includes ethylene carbonate (EC), propylene carbonate (PC), gamma -butyrolactone (GBL) and a fourth component that is a solvent other than the EC, the PC and the GBL, and the nonaqueous solvent satisfies the following equations (1) to (4): <DF NUM="(1)">15 </= x </= 50 </DF> <DF NUM="(2)">30 </= y </= 75 </DF> <DF NUM="(3)">0 < z < 30 </DF> <DF NUM="(4)">0 < p </= 5 </DF> where, the x is a ratio (volume%) of ethylene carbonate to a total volume of the nonaqueous solvent, the y is a ratio (volume%) of propylene carbonate to the total volume of the nonaqueous solvent, the z is a ratio (volume%) of gamma -butyrolactone to the total volume of the nonaqueous solvent, and the p is a ratio (volume%) of the fourth component to the total volume of the nonaqueous solvent. <IMAGE></p> |
