Progress in material selection for solid oxide fuel cell technology: A review

Nanoscale and nano-structured electrodes of solid oxide fuel cells by infiltration: Advances and challenges

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

In the context of solid oxide fuel cells (SOFCs) applications, mixed-ionic electronic conductors offer significant advantages over conventional cathodes especially in the intermediate-to-low range of temperatures where the performance of the cathode is of fundamental importance. An increasing number of layered oxide materials have been found to present excellent properties as mixed ionic-electronic conductors. Therefore, considerable efforts have been recently devoted to better understand and evaluate layered ordered structures. This article highlights the most important advances in this topic concentrating on both structural aspects and impact in cathode performance for SOFCs applications.

Advances in layered oxide cathodes for intermediate temperature solid oxide fuel cells

In this review article, new systems being investigated for application in solid oxide fuel cells are discussed. For the electrode materials, materials with the perovskite or related structures continue to dominate the field, due to the need for high electronic conductivity. Research in this field is being directed toward compositions allowing high ionic conductivity in addition to their electronic contribution. In contrast, research on new electrolyte materials has shown a diverse range of structure-types, with an apparent tendency toward structures containing cations in lower coordination environments, particularly tetrahedral. In both the electrode and electrolyte area, materials allowing the incorporation of oxygen excess into interstitial sites have shown promising results, warranting further investigations of materials that will allow this type of defect chemistry.

New Chemical Systems for Solid Oxide Fuel Cells

A newly developed cathode material, Ba0.5Sr0.5Co0.8Fe0.2O3-delta, was synthesized and characterized. X-ray diffraction results identified it as a cubic perovskite structure. Thermogravimetric results showed that lattice oxygen loss was about 2% in weight between 50 and 1000 degrees C. Thermal expansion coefficient results in air and argon were extraordinarily high, with slope changes occurring at about 382 and 360 degrees C, respectively. Electrical conductivity values were sufficient for cathode application with the maximum of about 28.1 S cm(-1) at 500 degrees C in air and 17.3 S cm(-1) at 900 degrees C in N-2, correspondingly. Both thermal and electrical properties were closely associated with lattice oxygen behaviors and oxygen partial pressure. (c) 2005 The Electrochemical Society.

Shuyan Li

Papers

Thermal and Electrical Properties of New Cathode Material Ba0.5Sr0.5Co0.8Fe0.2O3 − δ for Solid Oxide Fuel Cells

Thermal, electrical, and electrochemical properties of Nd-doped Ba0.5Sr0.5 Co0.8Fe0.2O3 − δ as a cathode material for SOFC

A study of (Ba0.5Sr0.5)1 − xSmxCo0.8Fe0.2O3 − δ as a cathode material for IT-SOFCs

Performances of Ba0.5Sr0.5Co0.6Fe0.4O3-δ -Ce0.8Sm0.2O1.9 composite cathode materials for IT-SOFC

Low temperature solid oxide fuel cells based on Sm0.2Ce0.8O1.9 films fabricated by slurry spin coating