Honda Motor Co., Ltd.
FLUORIDE ION SECONDARY BATTERY

Abstract:

Provided is a fluoride ion secondary battery that shows high charging and discharging efficiency even in an environment with an oxygen concentration of more than 2 ppm. The fluoride ion secondary battery includes a positive electrode material layer; a negative electrode material layer; a solid electrolyte layer disposed between the positive electrode material layer and the negative electrode material layer; and an exterior body that accommodates the positive electrode material layer, the negative electrode material layer, and the solid electrolyte layer in a hermetically sealed space filled with an Ar atmosphere. The hermetically sealed space in the exterior body may have an oxygen concentration of 7.3 ppm or less.