A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °c
MetadataShow full item record
The slow activity of cathode materials is one of the most significant barriers to realizing the operation of solid oxide fuel cells below 500 °C. Here we report a niobium and tantalum co-substituted perovskite SrCo0.8Nb0.1Ta0.1O3-d as a cathode, which exhibits high electroactivity. This cathode has an area-specific polarization resistance as low as ~0.16 and ~0.68 Ocm2 in a symmetrical cell and peak power densities of 1.2 and 0.7 W cm-2 in a Gd0.1Ce0.9O1.95-based anode-supported fuel cell at 500 and 450 °C, respectively. The high performance is attributed to an optimal balance of oxygen vacancies, ionic mobility and surface electron transfer as promoted by the synergistic effects of the niobium and tantalum. This work also points to an effective strategy in the design of cathodes for low-temperature solid oxide fuel cells.
Showing items related by title, author, creator and subject.
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 ...
Evaluation of Bi <inf>2</inf>V <inf>0.9</inf>Cu <inf>0.1</inf>O <inf>5.35</inf>-an Aurivillius-type conducting oxide-as a cathode material for single-chamber solid-oxide fuel cellsShao, Zongping; Mederos, J.; Kwak, C.; Haile, S. (2010)The compound Bi 2V 0.9Cu 0.1O 5.35, a typical Aurivillius-type fast oxygen ion conductor, was evaluated as a possible cathode material for single-chamber solid-oxide fuel cells operated under mixed propane and oxygen. The ...
Advances in Cathode Materials for Solid Oxide Fuel Cells: Complex Oxides without Alkaline Earth Metal ElementsChen, Y.; Zhou, W.; Ding, D.; Liu, M.; Ciucci, F.; Tade, Moses; Shao, Zongping (2015)© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Solid oxide fuel cells (SOFCs) represent one of the cleanest and most efficient options for the direct conversion of a wide variety of fuels to electricity. For example, ...