IMPROVEMENT OF ELECTROCHEMICAL PERFORMANCE OF SOFC COMPOSITE ELECTRODE FORMED BY EPD

摘要

It is well known that solid oxide fuel cells (SOFCs) are the next-gen hydrogen fueled power generator, because of their high energy conversion efficiency and fuel adjustability. In order to achieve high electrical performance of SOFC, the lowering of the overpotentials of both electrodes, cathode and anode, is indispensable as well as the lowering of ohmic resistance of electrolyte. Up to date, much effort has been paid for developing electrode material with low overpotential. For instance, perovskite-type oxide with high electronic and oxide-ionic conductivities [1] and Ni-YSZ cermet with highly active Ni catalyst [2] are commonly used as cathode and anode of SOFCs, respectively. We previously succeeded in forming double layer cathodes consisting of LSM-YSZ as the active layer and LSM (La_(0.8)Sr_(0.2)MnO_3) as the current collecting layer (LSM-YSZ/LSM) by electrophoretic deposition (EPD) technique [3]. In the present study, EPD method was applied to fabricate anode and cathode of SOFCs and the resulting cell was evaluated in SOFC performance.