Journal
ACTA MATERIALIA
Volume 58, Issue 2, Pages 355-363Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2009.08.072
Keywords
Solid electrolytes; Bismuth oxide; Lattice parameter; Conductivity; Total dopant concentration
Funding
- National Aeronautics and Space Administration (NASA) [NAG3-2930]
- Florida Institute for Sustainable Energy (FISE)
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Dysprosium- and tungsten-stabilized bismuth oxide (DWSB) electrolytes were developed to achieve higher conductivity. With double doping, stabilization of the cubic phase was achieved with as little as 12 mol.% total dopant concentration, resulting in higher conductivity. The conductivity of DWSB electrolytes increased linearly as the total dopant concentrations decreased with fixed dopant ratio. Overall, DWSB has a closer inherent structure to pure delta-Bi2O3 than any singly doped compositions. Both lattice parameter and conductivity linearly extrapolate with total dopant concentration to that of pure delta-Bi2O3, resulting in the ability to stabilize delta-phase at lower dopant concentration, and thus achieving higher conductivity. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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