Electrolyte, non-aqueous lithium-air secondary battery and aqueous lithium-air secondary battery

摘要

PROBLEM TO BE SOLVED: To provide an electrolyte capable of suppressing penetration of lithium dendrite and generation of dead lithium, and to provide a non-aqueous lithium air secondary battery and an aqueous lithium air secondary battery using the same. A non-aqueous lithium-air secondary battery includes a negative electrode containing metallic lithium, a porous positive electrode to which air is supplied, and an electrolyte. The electrolyte contains a non-aqueous electrolyte solution and a polymer compound swollen by the non-aqueous electrolyte solution. The polymer compound contains a polyurethane-modified polyimide resin which is a polyimide resin modified with polyurethane, and the urethane-modified polyimide resin contains a polyimide block containing a structural unit derived from diamine and acid dianhydride and a structural unit derived from diisocyanate and polyol. It is a resin that contains a polyurethane block and can be swollen by a non-aqueous electrolytic solution. [Selection diagram] Fig. 1