Paper Title:
Zircontes/Sulfates Composites: Perfect Combination of High- and Low-Temperature Protonic Conductors
  Abstract

Two typical classes of proton conductors, zirconates and solid acids (such as CsHSO4) or related sulfates, are intensively investigated recently. Based on the different proton-conducting mechanisms of zirconates and sulfates, we designed and fabricated Y2O3-doped barium zirconate/sulfates composites, aiming to make full use of the benefits, and eliminate the drawbacks of the two individual materials. The electrical conduction of the composite was studied by electrical and electrochemical methods. Microstructure of the composites was examined by SEM. Electromotive force (EMF) measurements were conducted under fuel cell conditions. The results indicated that small amount of sulfates was introduced at the grain boundaries of BaZr0.9Y0.1O2.95. The electrical conductivity of the composites was greatly improved and the total ionic transport numbers of the composites are more than 0.9 at 750 °C.

  Info
Periodical
Key Engineering Materials (Volumes 434-435)
Edited by
Wei Pan and Jianghong Gong
Pages
719-722
DOI
10.4028/www.scientific.net/KEM.434-435.719
Citation
Z. Z. Peng, R. S. Guo, Z. G. Yin, J. Li, "Zircontes/Sulfates Composites: Perfect Combination of High- and Low-Temperature Protonic Conductors", Key Engineering Materials, Vols. 434-435, pp. 719-722, 2010
Online since
March 2010
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$32.00
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