The present invention provides a nonaqueous electrolytic solution that provides an electric double layer capacitor having excellent durability. The nonaqueous electrolytic solution of the present invention is a nonaqueous electrolytic solution for electric double layer capacitors prepared by dissolving a quaternary ammonium salt as an electrolyte in a nonaqueous solvent, and the nonaqueous electrolytic solution has an alkali metal cation concentration of 0.1 to 30 ppm.
本发明提供了一种非
水电解溶液,它能提供一种具有出色耐久性的双电层电容器。本发明的非
水电解溶液是一种用于电动双层电容器的非
水电解溶液,它是通过在非
水溶剂中溶解作为电解质的季
铵盐来制备的,非
水电解溶液的碱
金属阳离子浓度为 0.1 至 30 ppm。