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Liu, Meilin
Liu Research Group
Research Interests
  • Fuel Cells

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A novel composite cathode for low-temperature SOFCs based on oxide proton conductors

Cited 123 times inthomson ciCited 121 times inthomson ci
Title
A novel composite cathode for low-temperature SOFCs based on oxide proton conductors
Author
Yang, LeiZuo, ChendongWang, ShizhongCheng, ZheLiu, Meilin
Keywords
FUEL-CELLS; CHEMICAL-STABILITY; ELECTROLYTE; BACEO3; CONDUCTIVITY
Issue Date
200809
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED MATERIALS, v.20, no.17, pp.3280 - 3283
Abstract
A study has demonstrated that high power densities can be achieved in solid oxide fuel cells (SOFC) based on oxide proton conductors using properly designed proton-oxygen ion-electron conducting cathode derived from BZCY (barium-zirconium-cerium-yttrium) and SSC (Sm0.5Sr 0.5CoO3). This cathode material was found to be very active for oxygen reduction as it allows the simultaneous transport of proton, oxygen vacancy, and electronic defects, extending the active sites for oxygen reduction to a large extent and significantly reducing the cathodic polarization resistance. The composite fired at 1000°C offers unique transport properties and greatly increase the number of active sites, facilitating the electro-chemical reactions on the entire cathode surfaces. Additional improvement is also possible by optimization of cathode composition and microstructure, while reduction of the thickness of BZCY electrolyte could yield further increase in power density.
URI
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DOI
http://dx.doi.org/10.1002/adma.200702762
ISSN
0935-9648
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