TY  - JOUR
AU  - al-Wahish, A.
AU  - Jalarvo, N.
AU  - Bi, Z.
AU  - Herwig, K. W.
AU  - Bridges, C. A.
AU  - Paranthaman, M. P.
AU  - Mandrus, D.
TI  - Fast Proton Diffusion in Ca-doped LaPO4 studied by Quasi-Elastic Neutron Scattering
JO  - The journal of physical chemistry  / C
VL  - 118
IS  - 35
SN  - 1932-7455
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2015-01763
SP  - 20112-20121
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000341337700008
DO  - DOI:10.1021/jp5048425
UR  - https://juser.fz-juelich.de/record/188357
ER  -