摘要
People are very interested in the research into fluorine ionic conductor, because F^- is the smallest negative ion, and it has only one charge which is in favour of migration; fluoride has quite a large change of free energy when forming, so it can be used as spacer material to get a battery with high voltage and high energy density; in addition, structure of fluoride is simple, its electron-conductivity is very low, so its theoretical model for ion-moving becomes simplified. Usually people apply the method of mingling with fluoride having higher valence in order to enhance ionic conductivity. For example, Insti-
