We demonstrate the applicability of studying the proton dynamics in proton-conducting perovskites using neutron spin-echo spectroscopy, a powerful method hitherto neglected for studies of the proton dynamics in ceramic proton conductors. By combining our neutron spin-echo results of hydrated BaZr0.90Y0.10O2.95 with results obtained from kinetic modeling based on first-principles calculations we show that already over a length-scale as short as 2 nm the long-range proton self-diffusion is observed, and the likely effect of dopant atoms acting as trapping centers has averaged out.
@article{arxiv.0906.2346,
title = {Using neutron spin-echo to investigate proton dynamics in proton-conducting perovskites},
author = {Maths Karlsson and Dennis Engberg and Mårten E. Björketun and Aleksandar Matic and Göran Wahnström and Per G. Sundell and Pedro Berastegui and Istaq Ahmed and Peter Falus and Bela Farago and Lars Börjesson and Sten Eriksson},
journal= {arXiv preprint arXiv:0906.2346},
year = {2009}
}
Comments
3 pages, 3 figures, Supporting Information available