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Enhanced CO2 stability of oxyanion doped Ba2In2O5 systems co-doped with La, Zr

Shin, J. Felix and Slater, P.R. (2011) Enhanced CO2 stability of oxyanion doped Ba2In2O5 systems co-doped with La, Zr. Journal of Power Sources, 196. pp. 8539-8543.

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URL of Published Version: http://www.sciencedirect.com/science/article/pii/S0378775311011153

Identification Number/DOI: DOI:10.1016/j.jpowsour.2011.06.03

In the Solid Oxide Fuel Cell (SOFC) field, proton conducting perovskite electrolytes offer many potential benefits. However, an issue with these electrolytes is their stability at elevated temperatures in the presence of CO2. Recently we have reported enhanced oxide ion/proton conductivity in oxyanion (silicate, phosphate) doped Ba2In2O5, and in this paper we extend this work to examine the stability at elevated temperatures towards CO2. The results show improved CO2 stability compared to the undoped system, and moreover this can be further improved by co-doping on either the Ba site with La, or the In site with Zr. While this co-doping strategy does reduce the conductivity slightly, the greatly improved CO2 stability would suggest there is technological potential for these co-doped samples.

Type of Work:Article
Date:17 June 2011 (Publication)
School/Faculty:Schools (1998 to 2008) > School of Chemical Sciences
Department:Chemistry
Keywords:Solid Oxide Fuel Cells, proton conductor, perovskite
Subjects:QD Chemistry
Institution:University of Birmingham
Copyright Holders:Elsevier
ID Code:772
Refereed:YES
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