Electrochemical performances of LiNiCoMn bifunctional electrode for low temperature solid oxide fuel cells

Lithium transition metal oxides LiNi0.83Co0.11Mn0.06O2 (NCM-83) and LiNi0.8Co0.1Mn0.1O2 (NCM-811) are prepared and acted as cathodes and bifunctional electrodes for low temperature solid oxide fuel cells with H2 and CH4 fuels. The Ni anode-supported cell with NCM-83 cathode exhibits maximum power density (Pmax) of 0.72 W cm-2 with H2 fuel at 600 & DEG;C. The symmetric cell with NCM-83 electrodes shows high Pmax of 0.465 W cm-2 with H2 fuel and 0.354 W cm-2 with CH4 fuel at 600 & DEG;C. And the Pmax of the cell with NCM-811 as anode and NCM-83 as cathode is 0.204W cm-2 with H2 fuel at 600 & DEG;C. The oxygen vacancies in NCM materials are conducive to the rapid oxygen ion conduction of the cathode, and in the anodic reduction atmosphere, the NCM materials will generate Ni/Co active particles in situ, proving the NCM materials can be advanced bifunctional electrode materials for hydrogen oxidation reaction and oxygen reduction reaction at low temperature. & COPY; 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.