Rapid degradation phenomenon of NiCu–Ce0.8Gd0.2O1.9 anode at high p(H2O) in different concentrations of dry methane |
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| Authors: | Gang Chen Guoqing Guan Shawket Abliz Yutaka Kasai Abuliti Abudula |
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| Affiliation: | aGraduate School of Science and Technology, Hirosaki University, 1-bunkyocho, Hirosaki 036-8560, Japan;bNorth Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University, 2-1-3, Matsubara, Aomori 030-0813, Japan;cCollege of Chemistry and Chemical Engineering, Xinjiang University, 14 ShengLi Road, Urumqi 830046, China;dIndustrial Research Institute, Aomori Prefectural Industrial Technology Research Center, 4-11-6, Second Tonyamachi, Aomori 030-0113, Japan |
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| Abstract: | Degradation phenomena of Ni0.5Cu0.5–CGO (Ce0.8Gd0.2O1.9) bimetallic anode in different concentrations of dry methane were studied in LSM ((La0.75Sr0.25)0.95MnO3−δ)–CGO cathode supported SOFCs. According to XRD, SEM and EIS analyses, the degradation of the Ni0.5Cu0.5–CGO bimetallic anode could be mainly attributed to re-oxidation of Ni by H2O and/or by rapid sintering of Ni due to a high p(H2O) appeared at a high current density. Furthermore, it is found that the degradation of anode resulted by the re-oxidation of Ni and/or by rapid sintering of Ni in the as-prepared cells generally occurred when the partial pressure ratio of the produced H2O and CH4 at the outlet of anode increased above a threshold value in different concentrations of dry methane. |
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| Keywords: | Solid oxide fuel cell Rapid degradation Re-oxidation Methane |
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