Performance Improvement of Oxide Catalyst-Doped Anode-Supported SOFCs for Methane Fuel

Abstract

Solid oxide fuel cells (SOFCs) with conventional Ni cermet anode suffer carbon deposition when directly used with hydrocarbon fuels. In this work, oxide catalysts containing Li 2 TiO 3 , which can prevent carbon deposition, were developed, and the performance of catalyst-doped anode-supported SOFCs used with CH 4 fuel was evaluated. The Li 2 TiO 3 catalyst showed excellent resistance to carbon deposition on Li 2 TiO 3 -catalyst-doped Ni-yttria-stabilized zirconia (YSZ) anodes. The power density of the catalyst-doped Ni-YSZ anode-supported unit cells was higher than 0.4 W/cm 2 at 800°C, and in particular, their long-term stability improved considerably when used with CH 4 fuel.