Chromium deposition and poisoning of La2NiO4 cathode of solid oxide fuel cell. Issue 10 (17th October 2018) - Hou, Bingxue
Abstract : Chromium deposition and poisoning of La2 NiO4 cathode of solid oxide fuel cell were studied. La2 NiO4 cathode showed stable performance in the presence of metallic interconnects. Comparing with the polarization resistance ( R p ) of La2 NiO4 cathode in the absence of metallic interconnects, R p did not change in the presence of metallic interconnect. After electrical conductivity relaxation method, La2 NiO4 with high surface oxygen diffusion coefficients working under Cr atmosphere improved the oxygen reduction kinetics and increased cathode O2 reduction reaction rates. No chromium deposition was observed on the La2 NiO4 cathode surface after polarization for 20 h at 800°C. The chemical compatibility of La2 NiO4 /Cr2 O3 and La2 NiO4 /Gd0.1 Ce0.9 O1.95 (GDC) study indicates that La2 NiO4 did not react with Cr2 O3 and GDC under the operating temperature. The results indicate that La2 NiO4 cathode is a potential chromium-tolerant material of solid oxide fuel cell.