Novel ceramic fuel cells based on CeO2 salt (i.e., Li2CO3-K2CO3) composite electrolyte, operating at 480-550degreesC, was studied. Various fuel cell construction techniques and electrode materials were investigated. Ni-Ce0.8Gd0.2O1.9 (GDC) is employed as the anode, while Ag and some perovskite materials, such as La0.8Sr0.2MnO3 (LSM), La0.6Sr0.4Co0.2Fe0.8O3 (LSCF), and La0.6Sr0.4CoO3 (LSC) are chosen as the cathode. Among them, the fuel cell, using Ni-GDC and La0.6Sr0.4CoO3 as the anode and the cathode, respectively, has shown the best performance. 750 mA cm(-2) at 0.4 V was achieved at 530degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.