New advanced ceramic fuel cell technology using MF_x (M = Na, Ca, Ba, La, x = 1-3) based electrolytes

The operation of new advanced ceramic-type fuel cells (FCs) using MF_x (M = Na, Ca, Ba, La, x = 1-3) based electrolytes was studied. Various FC construction techniques and electrode materials were investigated. Among them, the LiNiO₂ anode-supported cell has shown the best performance, 200 mA/cm² at 0.4 V can be reached, based on bulk materials. The conductivity and ionic transport properties for the MF_x-based electrolytes have also been investigated. During the FC's operation, water was often observed at the cathode, indicating that proton conduction occurs in these electrolyte materials. The experiments indicate an interesting chance for the future development of innovative FC technology.