FLUORIDE SHUTTLE SECONDARY BATTERY, AND METHOD FOR USING FLUORIDE SHUTTLE SECONDARY BATTERY

Abstract

A fluoride shuttle secondary battery (1) of the present disclosure is a fluoride shuttle secondary battery including: a positive electrode (2); a negative electrode (4); and an electrolyte layer (3) arranged between the positive electrode (2) and the negative electrode (4), wherein the fluoride shuttle secondary battery satisfies at least one selected from the group consisting of the following (A1) and (B1). (A1) The negative electrode (4) contains a first negative electrode active material and a second negative electrode active material having composition different from that of the first negative electrode active material, the first negative electrode active material is a first metal fluoride containing a metal M1, and the metal M1 has a melting point of 0° C. or more and 250° C. or less. (B1) The positive electrode (2) contains a first positive electrode active material and a second positive electrode active material having composition different from that of the first positive electrode active material, and the first positive electrode active material is a metal M2, which forms a metal fluoride represented by M2Fx and having a melting point of 0° C. or more and 250° C. or less, where “x” represents a valence of the M2.

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