Progress in understanding and development of Ba{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-{delta}}-based cathodes for intermediate-temperature solid-oxide fuel cells: A review Zhou, Wei; Ran, Ran; Shao, Zongping [State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, No. 5 Xin Mofan Road, Nanjing 210009 (China)] 30 DIRECT ENERGY CONVERSION; CATHODES; SOLID OXIDE FUEL CELLS; THERMAL DEGRADATION; PERFORMANCE; REDUCTION; PEROVSKITE; OPTIMIZATION; RECOMMENDATIONS; BARIUM OXIDES; STRONTIUM OXIDES; COBALT OXIDES; IRON OXIDES; DECOMPOSITION; ELECTRIC CONTACTS; IRON; Intermediate-temperature solid-oxide fuel cell; Ba{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-{delta}}; Cathode; Oxygen reduction reaction; Perovskite Intermediate-temperature solid-oxide fuel cell; Ba{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-{delta}}; Cathode; Oxygen reduction reaction; Perovskite Solid-oxide fuel cells (SOFCs) convert chemical energy directly into electric power in a highly efficient way. Lowering the operating temperature of SOFCs to around 500-800 C is one of the main goals in current SOFC research. The associated benefits include reducing the difficulties associated with sealing and thermal degradation, allowing the use of low-cost metallic interconnectors and suppressing reactions between the cell components. However, the electrochemical activity of the cathode deteriorates dramatically with decreasing temperature for the typical La{sub 0.8}Sr{sub 0.2}MnO{sub 3}-based electrodes. The cathode becomes the limiting factor in determining the overall cell performance. Therefore, the development of new electrodes with high electrocatalytic activity for oxygen reduction becomes a critical issue for intermediate-temperature (IT)-SOFCs. Ba{sub 0.5}Sr{sub 0.5}Co{sub 0.8}Fe{sub 0.2}O{sub 3-{delta}} (BSCF) perovskite oxide was first reported as a potential IT-SOFC cathode material in 2004 by Shao and Haile. After that, the BSCF cathode has attracted considerable attention. This paper reviews the current research activities on BSCF-based cathodes for IT-SOFCs. Emphasis will be placed on the understanding and optimization of BSCF-based materials. The issues raised by the BSCF cathode are also presented and analyzed to provide some guidelines in the search for the new generation of cathode materials for IT-SOFCs. (author) Available from: http://dx.doi.org/10.1016/j.jpowsour.2009.02.069 Netherlands 2009-07-15 English Journal Article Journal Name: Journal of Power Sources; Journal Volume: 192; Journal Issue: 2; Other Information: Elsevier Ltd. All rights reserved Medium: X; Size: page(s) 231-246 https://doi.org/10.1016/J.JPOWSOUR.2009.02.069 [] 2 192 Journal ID: ISSN 0378-7753; JPSODZ; TRN: NL09V4213 ECN 2010-01-01 21186653