Research Progress in Coking Resistance of Ni-based Anodes for Solid Oxide Fuel Cells

Solid oxide fuel cell (SOFC) is an emerging energy technology to alleviate the energy crisis, which has the advantages of high efficiency, sustainability and pollution-free. Ni-based cermets have become the most promising choice for commercial SOFC anode materials, due to their high electronic conductivity, high ionic conductivity and excellent catalytic activity for hydrocarbon fuels. However, when carbon-containing fuels are used for Ni-based anode SOFC, it is easy to deactivate due to carbon deposition, resulting in battery performance degradation. In view of this, the mechanism of Ni-based anode carbon deposition in carbon-containing fuels is firstly analyzed. Then, the causes, processes, types and hazards of Ni-based anodic carbon deposition are clarified and the common characterization methods for carbon deposition are introduced. Secondly, the mechanisms and strategies of Ni-based anodes at home and abroad to improve the coking resistance are summarized. Finally, prospects for the development direction of carbon resistance strategy for Ni-based anodes are proposed.