Honda Motor Co., Ltd.
NEGATIVE ELECTRODE FOR USE IN FLUORIDE ION SECONDARY BATTERY AND FLUORIDE ION SECONDARY BATTERY INCLUDING SAME

Abstract:

Provided is a fluoride ion secondary battery having a capacity larger than that of a conventional one. A negative electrode for use in such a fluoride ion secondary battery includes a complex of Li.sub.3AlF.sub.6 and AlF.sub.3 as a negative electrode active material. The complex of Li.sub.3AlF.sub.6 and AlF.sub.3 preferably has a molar ratio of AlF.sub.3 to Li.sub.3AlF.sub.6 of 0.1 to 2. The content of the complex of Li.sub.3AlF.sub.6 and AlF.sub.3 in the negative electrode is preferably 25% by mass or less. The complex of Li.sub.3AlF.sub.6 and AlF.sub.3 is preferably in an amorphous state.