Fabrication and evaluation of stable micro tubular solid oxide fuel cells with BZCY-BZY bi-layer proton conducting electrolytes |
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| Authors: | Beibei He Dong Ding Yihan Ling Ling Zhao Jigui Cheng |
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| Affiliation: | 1. School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;2. School of Materials Science & Engineering, Georgia Institute of Technology, 771 Ferst Drive, Rm288 Atlanta, GA 30332, USA;3. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan;4. Department of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | Anode-supported proton conducting micro tubular solid oxide fuel cells (MT-SOFCs) with the configuration of Ni–BaZr0.1Ce0.7Y0.2O3-δ (BZCY)/BZCY/BaZr0.8Y0.2O3-δ (BZY)/La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF)-BZY have been prepared by a combination of phase inversion method and suspension-coating technique. The obtained Ni-BZCY anode hollow fiber presents a special asymmetrical structure consisting of a sponge-like layer and a finger-like porous layer, which is propitious to anode electrochemical process. Bi-layer electrolytes consisting of 5 μm thick BZCY and 3 μm thick BZY are successfully fabricated by suspension-coating technique. BZY electrolytes are placed at the cathode side, in order to improve the chemical stability against CO2. The considerable electrochemical performance and good stability in the presence of CO2 indicate that the construction of BZY-BZCY bi-layer electrolytes is an effective way for the development of stable proton conducting MT-SOFCs. |
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| Keywords: | Micro tubular solid oxide fuel cells Proton conducting Bi-layer electrolytes Stable |
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