LiF-CaH₂ alumina electrolytes for intermediate temperature fuel cell applications

Hydrofluoride-based electrolytes with proton conduction have been successfully used in intermediate temperature fuel cell applications. Among the various hydrofluoride electrolytes, LiF-CaH₂ and its composite with Al₂O₃, i.e., LiF-CaH₂-Al₂O₃, are the most promising candidates which show more advantages than the other hydrofluorides. In this communication, we put our emphasis on the LiF-CaH₂-Al₂O₃ electrolytes and their applications for intermediate temperature fuel cells. Furthermore, new fuel cell processes from hydride ions, H^-, and the electrochemical behaviour of LiF-CaH₂-Al₂O₃ electrolytes and fuel cells are discussed in more detail. (C) 2000 Elsevier Science S.A.