Journal
SOLID STATE IONICS
Volume 252, Issue -, Pages 12-18Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2013.07.015
Keywords
Solid oxide fuel cells; High-temperature proton conductor; Thermogravimetry; Quasielastic incoherent neutron scattering
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Funding
- Scientific User Facilities Division, Office of Basic Energy Sciences, U. S. Department of Energy
- U.S. Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division
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La0.8Ba1.2GaO3.9 center dot nH(2)O presents an interesting system with tetrahedral network of GaO4, and high oxide ion and proton conductivities. High-resolution quasielastic incoherent neutron scattering experiments were performed to gain better understanding of the proton conduction mechanism in tetrahedral systems. Translational long-range proton diffusion was observed. The activation energy for this process is 0.5 eV. Mean-square-displacement of 0.7 A(2) for protons was obtained for the temperature range where the long-range proton diffusion occurs. (C) 2013 Elsevier B.V. All rights reserved.
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