Yucun Zhou

La0·8Sr0·2Cr0·5Fe0·5O3-d as anode material on cathode-support SOFCs for direct hydrocarbon utilisation

Abstract Perovskite oxides have some advantages compared with metal oxides when used for hydrocarbon fuel. La0·8Sr0·2Cr0·5Fe0·5O3-d (LSCF) was prepared by the sol–gel method. X-ray diffraction shows that pure perovskite phases of LSCF were obtained at 1100°C. Catalytic properties and conductivity were investigated by temperature-programmed reduction and the four-probe method. Finally, utilising tape casting and lamination, we fabricated a cathode-support SOFC with a LSCF-Zr0·89Sc0·1Ce0·01O2-x(SSZ) anode by a one-time co-sintering process at 1250°C. The performance of the functioning fuel cell and a short-term stability test were investigated both in H2 and CH4 fuels. The result show that LSCF is a possible electrode material for future applications.

Metal supported solid oxide fuel cells with infiltrated nanoelectrodes

Abstract Novel metal supported solid oxide fuel cells (SOFCs) containing porous 430L support, yttria stabilised zirconia (YSZ) electrolyte and porous YSZ layer are fabricated by tape casting, tape lamination and subsequent cofiring in a reduced atmosphere. Nano Ni–Ce0·8Sm0·2O2−δ (SDC) and La0·8Sr0·2FeO3−δ (LSF) particles, which act as anode and cathode catalysts, individually, are infiltrated onto the internal surfaces of porous 430L and YSZ respectively. Maximum power density of the single cell is 850 mW cm−2 at 800°C. Encouraging performances of the infiltrated electrodes are also achieved, e.g. 0·06 Ω cm2 for the LSF infiltrated YSZ composite cathode and 0·075 Ω cm2 for the Ni-SDC infiltrated 430L composite anode at 800°C. Additionally, oxygen reduction kinetics over infiltrated LSF–YSZ composite cathodes is also studied.