Novel metal-supported solid oxide fuel cells with impregnated symmetric La_(0.6)Sr_(0.4)Fe_(0.9)Sc_(0.1)O_(3-δ) electrodes

摘要

This paper reports on the fabrication of novel metal-supported solid oxide fuel cells containing porous 430L stainless steel substrates, YSZ electrolytes and porous YSZ cathode backbones. Such tri-layer structures are obtained by the tape casting, lamination and co-firing techniques. Redox-stable La_(0.6)Sr_(0.4)Fe_(0.9)Sc_(0.1)O_(3-δ) (LSFSc) oxides are introduced as symmetric electrode catalysts onto the internal surfaces of porous 430L substrates and YSZ backbones using the solution impregnation method. The maximum power density is 0.65 W cm~(-2) measured at 800 ℃. Impedance analyses show that the anode polarizations are the largest losses while the cathode polarizations make negligible contribution to the total cell resistances.