Sr and Fe co-doped Ba2In2O5 as a new proton-conductor-derived cathode for proton-conducting solid oxide fuel cells |
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| Affiliation: | 1. School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China;2. School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China;1. Department of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Road, Hefei, Anhui Province, 230026, PR China;2. Energy Materials Center, Anhui Estone Materials Technology Co. Ltd, 2-A-1, No.106, Chuangxin Avenue, Hefei, Anhui Province, 230088, PR China;3. School of Material Science and Engineering, Shanghai University, 200444 Shanghai, PR China;4. School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China;5. Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia;1. School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, China;2. School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China;1. School of Mechanical and Electrical Engineering, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, PR China;2. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi, China;3. Department of Chemistry & Chemical Engineering, Lahore University of Management Sciences (LUMS), Pakistan;4. Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, 842 15, Bratislava, Slovakia;5. College of Electronics and Information Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518000, China;6. Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL–30239, Krakow, Poland;1. School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;2. Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain;3. ICREA, Pg. Lluís Companys 23, Barcelona 08010 Catalonia, Spain;4. Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China |
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| Abstract: | BaSrInFeO5 (BSIF), a new cathode material for proton-conducting solid oxide fuel cells (SOFCs), is designed based on the modification of the Ba2In2O5 proton conductor with Sr and Fe cations. Compared with the Ba2In2O5 proton conductor tailored with only Fe cations (Ba2InFeO5, BIF), doping Sr can improve the chemical stability and also benefit the formation of oxygen vacancies. The proton mobility is also improved with Sr-doping, which is confirmed by first-principles calculations and experimental studies. An H-SOFC using the BSIF cathode generates a relatively high peak power density of 1192 mW cm-2 at 700 oC, which is superior to many cells in previous reports. First-principles calculations find that the cathode oxygen reduction reaction (ORR) energy barrier for BSIF is significantly lower than that for BIF. Although Ba2In2O5 is less studied, the derived cathode materials can still present decent performance, probably offering new material selections for H-SOFCs. |
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| Keywords: | Cathode Proton conductor Solid oxide fuel cells |
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