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.