The operation of new advanced ceramic-type fuel cells (FCs) using MFx (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/cm(2) at 0.4 V can be reached, based on bulk materials. The conductivity and ionic transport properties for the MFx-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.