Progress in understanding and development of Ba0.5Sr0.5Co0.8Fe0.2O3-+�-based cathodes for intermediate-temperature solid-oxide fuel cells: A review

  • Zhou W
  • Ran R
  • Shao Z
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Abstract

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-+� (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

Author-supplied keywords

  • 110
  • 3D
  • ALLOY
  • ALLOYS
  • ASSEMBLIES
  • BSCF
  • BSCF cathode
  • Ba0.5Sr0.5Co0.8Fe0.2O3-+�
  • BaO
  • CATHODES
  • CELL
  • CELLS
  • CH
  • CHEMISTRY
  • COMPONENT
  • COMPONENTS
  • Chemical
  • China
  • D
  • DEGRADATION
  • DESIGN
  • EARTH
  • EDS
  • EFFICIENT
  • ELECTROCATALYTIC ACTIVITY
  • ELECTROCHEMISTRY
  • ELECTRODES
  • ENERGIES
  • ENERGY
  • Electrocatalytic
  • Electrochemical
  • FILM
  • FUEL
  • FUEL-CELL
  • FUEL-CELLS
  • FUNDAMENTALS
  • GENERATION
  • H
  • HAN
  • HIGH-TEMPERATURE
  • HIGHLY EFFICIENT
  • INTERCONNECTORS
  • INTERMEDIATE-TEMPERATURE
  • ISSUES
  • IT SOFC
  • IT SOFC cathode
  • IT SOFCs
  • IT-SOFC
  • IT-SOFC cathode
  • IT-SOFCs
  • ITO
  • ITSOFC
  • ITSOFCs
  • Intermediate-temperature solid-oxide fuel cell
  • Intermediate-temperature solid-oxide fuel cells
  • Ionics
  • KINETICS
  • LI
  • LOW-COST
  • LU
  • MICRO
  • Micro solid oxide fuel cell
  • NO
  • OXIDE
  • OXIDE-FUEL-CELLS
  • OXYGEN
  • OXYGEN REDUCTION
  • OXYGEN REDUCTION KINETICS
  • OXYGEN-REDUCTION
  • PART
  • PEI
  • PERFORMANCE
  • PEROVSKITE
  • PHYSICS
  • POWDER
  • POWER
  • PROGRESS
  • RARE-EARTH
  • RARE-EARTHS
  • RE
  • REDUCTION
  • RES
  • SCIENCE
  • SEARCH
  • SERIES
  • SOFC
  • SOFCS
  • SOLID OXIDE FUEL
  • SOLID-OXIDE
  • SOLID-OXIDE FUEL
  • SOLID-STATE
  • STATE
  • SUZUKI
  • Sealing
  • Sol gel
  • Solid state chemistry
  • Solid state ionics
  • TAN
  • TECHNOLOGIES
  • TECHNOLOGY
  • TEMPERATURE
  • THERMAL-DEGRADATION
  • THIN
  • THIN-FILM
  • Thermal
  • US
  • V
  • W
  • Y
  • activity
  • applications
  • assembly
  • cathode
  • cathode material
  • cathode materials
  • cell performance
  • ceramic
  • ceramic fuel cell
  • colloid
  • colloids
  • electrochemical activity
  • electrode
  • fuel cell
  • fuel cells
  • high temperature
  • interconnector
  • intermediate temperature
  • intermediate temperature solid oxide fuel cell
  • intermediate temperature solid oxide fuel cells
  • ionic
  • kinetic
  • materials
  • mixed conducting
  • mixed-conducting
  • model
  • new generation
  • optimization
  • ordered
  • ordered macroporous
  • oxide fuel cells
  • oxygen reduction reaction
  • perovskite oxide
  • perovskite-oxide
  • rare earth
  • rare earths
  • reaction
  • reactions
  • reduction kinetics
  • review
  • sol-gel
  • solgel
  • solid oxide
  • solid oxide fuel cell
  • solid oxide fuel cells
  • solid-oxide fuel cell
  • solid-oxide fuel cells
  • solids
  • thermal degradation
  • thin film

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Authors

  • W Zhou

  • R Ran

  • Z Shao

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