%0 Journal Article
%A al-Wahish, A.
%A Jalarvo, N.
%A Bi, Z.
%A Herwig, K. W.
%A Bridges, C. A.
%A Paranthaman, M. P.
%A Mandrus, D.
%T Fast Proton Diffusion in Ca-doped LaPO4 studied by Quasi-Elastic Neutron Scattering
%J The journal of physical chemistry  / C
%V 118
%N 35
%@ 1932-7455
%C Washington, DC
%I Soc.
%M FZJ-2015-01763
%P 20112-20121
%D 2014
%X We have investigated the diffusion dynamics of protons in hydrated 4.2%Ca-doped LaPO4, a candidate electrolyte for proton-conducting intermediate temperaturefuel cells. The macroscopic and microscopic dynamics have been studied usingelectrochemical impedance spectroscopy (EIS) and quasi-elastic neutron scattering(QENS), respectively. The conductivity of the bulk hydrated sample was determined inthe temperature range of 500−850 °C by EIS and showed a clear signature of protonconductivity with an activation energy of about 1.0 eV. The QENS experiment revealed afast dynamical process below 500 °C that was not observed by EIS. The activation energyof the fast proton diffusion is 0.09 eV in the temperature range from 150 °C to 500 °C.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000341337700008
%R 10.1021/jp5048425
%U https://juser.fz-juelich.de/record/188357