The present invention aims to provide an electrolyte solution containing a quaternary ammonium salt as an electrolyte salt and is capable of providing an electrochemical device having a high capacitance retention and reducing generation of gas. The electrolyte solution of the present invention contains a solvent, a quaternary ammonium salt, and a nitrogen-containing unsaturated cyclic compound. The unsaturated cyclic compound is a nitrogen-containing unsaturated heterocyclic compound. The unsaturated cyclic compound excludes salts of the unsaturated cyclic compound and ionic liquids obtainable from the unsaturated cyclic compound.
本发明旨在提供一种电解质溶液,其中包含季
铵盐作为电解质盐,并能够提供具有高电容保持率并减少气体生成的电
化学器件。本发明的电解质溶液包含溶剂、季
铵盐和含氮不饱和环状化合物。不饱和环状化合物是一种含氮不饱和
杂环化合物。该不饱和环状化合物不包括该化合物的盐和可从该不饱和环状化合物获得的
离子液体。