Performance and Limitations of Nickel-Doped Chromite Anodes in Electrolyte-Supported Solid Oxide Fuel Cells.

ABSTRACT: Ni-doped chromite anodes were integrated into electrolyte-supported cells (ESC) with 5×5 cm² size and investigated in fuel cell mode with H₂ /H₂ O fuel gas. Both a stoichiometric and a nominally A-site deficient chromite anode material showed promising performance at 860 °C approaching the ones of state-of-the-art Ni/Gd-doped ceria (CGO) anodes. While the difference in polarization resistance was small, an increased ohmic resistance of the perovskite anodes was observed, which is related to their limited electronic conductivity. Increasing the chromite electrode thickness was shown to enhance performance and stability considerably. Degradation increased with current density, suggesting its dependency on the electrode potential, and could be reversed by redo

SUBMITTER: Riegraf M 

PROVIDER: S-EPMC8252760 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature