Progress in understanding and development of Ba0.5Sr0.5Co0.8Fe0.2O3−δ-based cathodes for intermediate-temperature solid-oxide fuel cells: A review
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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 La0.8Sr0.2MnO3-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. Ba0.5Sr0.5Co0.8Fe0.2O3-d (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. © 2009 Elsevier B.V. All rights reserved.
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Electrochemical performance of silver-modified Ba0.5Sr0.5Co0.8Fe0.2O3-d cathodes prepared via electroless depositionZhou, W.; Ran, R.; Shao, Zongping; Cai, R.; Jin, W.; Xu, N.; Ahn, J. (2008)Silver-modified Ba0.5Sr0.5Co0.8Fe0.2O3-d (BSCF) cathodes for intermediate-temperature solid-oxide fuel cells (IT-SOFCs) were prepared by an electroless deposition process using N2H4 as the reducing agent at room temperature. ...
Evaluation of (Ba 0.5Sr 0.5) 0.85Gd 0.15Co 0.8Fe 0.2O 3-[delta] cathode for intermediate temperature solid oxide fuel cellLi, Z.; Wei, Bo; Lu, Z.; Zhang, Y.; Chen, Kongfa; Miao, J.; Su, W. (2012)A perovskite-type (Ba0.5Sr0.5)0.85Gd0.15Co0.8Fe0.2O3−δ (BSGCF) oxide has been investigated as the cathode of intermediate temperature solid oxide fuel cells (IT-SOFCs). Coulometric titration, thermogravimetry analysis, ...
Shao, Zongping; Haile, S. (2010)© 2011 Nature Publishing Group, a division of Macmillan Publishers Limited and published by World Scientific Publishing Co. under licence. All rights reserved.Fuel cells directly and efficiently convert chemical energy ...