An electrolytic solution containing
a specific organic solvent at a mole ratio of 1-8 relative to a metal salt,
the specific organic solvent being selected from a linear carbonate represented by general formula (1-1) below, an ester represented by general formula (1-2) below, and a phosphoric ester represented by general formula (1-3) below,
the metal salt being a metal salt whose cation is an alkali metal, an alkaline earth metal, or aluminum and whose anion has a chemical structure including two or three types of elements selected from boron, carbon, oxygen, a halogen, phosphorus, and arsenic, wherein
R10OCOOR11 general formula (1-1)
R12COOR13 general formula (1-2)
OP(OR14)(OR15)(OR16) general formula (1-3).
电解溶液中含有
相对于
金属盐的摩尔比为 1-8 的特定有机溶剂、
特定有机溶剂选自以下通式(1-1)代表的线性
碳酸盐、以下通式(1-2)代表的酯和以下通式(1-3)代表的
磷酸酯、
金属盐是阳离子为碱
金属、碱土
金属或铝,阴离子的
化学结构包括选自
硼、碳、氧、卤素、
磷和
砷的两类或三类元素的
金属盐,其中
R10OCOOR11 通式(1-1)
R12COOR13 通式(1-2)
OP(OR14)(OR15)(OR16) 通式 (1-3)。