Aqueous solution-based secondary battery and aqueous solution-based secondary battery system

摘要

PROBLEM TO BE SOLVED: To provide an aqueous solution-based secondary battery and an aqueous solution-based secondary battery system having high output and long life even at a high temperature. An aqueous secondary battery 100 according to the present invention is an aqueous solution containing water in contact with a positive electrode 1, a negative electrode 2 arranged apart from the positive electrode 1, the positive electrode 1 and the negative electrode 2. The system electrolytic solution 3 includes the positive electrode 1, the negative electrode 2, and an exterior body 4 containing the aqueous electrolytic solution 3, and is composed of an upper portion, an outer periphery, and an inner wall of the outer body 4 of the aqueous electrolytic solution 3. A volatilization suppression layer 5 that is arranged in at least one selected from the group and suppresses the volatilization of the aqueous electrolytic solution 3 is provided, and the volatilization suppression layer 5 is a refractory liquid 5a and the refractory liquid 5a. It includes a porous holding body 5b that holds the liquid 5a, and a porous holding body 5b. [Selection diagram] Fig. 1