An electrolyte solution capable of providing electrochemical devices whose internal resistance is less likely to increase even after repeated charge and discharge and whose cycle capacity retention ratio is high. The electrolyte solution contains a solvent, an electrolyte salt, and a phosphate in an amount of 0.001 to 15 mass % relative to the solvent and represented by the formula (1): (R11O)(R12O)PO2M, where R11, R12 and M are as defined herein.
一种电解质溶液,能够提供即使在反复充放电后内阻也不易增加且循环容量保持率高的电
化学装置。该电解质溶液含有溶剂、电解质盐和
磷酸盐,相对于溶剂的质量百分比为 0.001 至 15%,由式(1)表示:(R11O)(R12O)PO2M,其中 R11、R12 和 M 如本文所定义。