Electrocatalytic performances of Ni/SDC anodes fabricated with EPD techniques for direct oxidation of CH4 in solid oxide fuel cells

The electrochemical performances and the morphologies of Ni/SDC anodes fabricated by EPD technique were investigated for direct oxidation of dry CH4 in solid oxide fuel cells (SOFCs). Ni/SDC(EPD) anode with both 20 wt% of Ni content and 20 μm of thickness exhibited the lowest overpotential and the highest maximum power density for dry CH4–air SOFC at 973 K. The power density of the cell with Ni/SDC(EPD) anode was higher than that with Ni/SDC fabricated by a conventional slurry coating method. It was found that Ni/SDC(EPD) anode having dense structure suppressed carbon deposition and exhibited a stable cell operation in SOFC using dry CH4.