FLUORIDE ION CONDUCTOR AND FLUORIDE ION BATTERY

Abstract

A fluoride ion conductor is represented by the following composition formula (1): A1-xAExM2P7+x . . . (1) (wherein A=Na, K, Rb, Cs, or a combination thereof; AE=Ca, Sr, Ba, or a combination thereof; M=Sc, Y, Ln, (Ln is a lanthanoid element), Al, Ga, In, or a combination thereof; and 0<x<1). A fluoride ion battery includes the fluoride ion conductor as a solid electrolyte for fluoride ion batteries.

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