In-situ conductivity and hydration studies of proton conductors using neutron powder diffraction
Paper i proceeding, 2012

An impedance spectroscopy cell and humidifier system has been developed to study the ion conducting properties and hydration/dehydration reactions in-situ during neutron powder diffraction experiments. As a model system, acceptor doped barium zirconate, BaZr0.5In0.5O2.75, has been studied during in-situ hydration and dehydration. Rietveld refinement of the collected data shows an increase in lattice parameter, a, upon hydration of BaZr0.5In0.5O2.75. In addition, we show the existence of a two-phase region, containing deuterated and non-deuterated barium zirconate, in the temperature interval ~ 573 K to ~ 873 K. Impedance spectroscopy data collected in-situ on heating and cooling and the corresponding ionic conductivity agree well with the change in deuteron content, as determined from neutron diffraction as a function of temperature. The newly developed in-situ cells make it possible to correlate conducting properties to structural changes under identical conditions and will have applicability to many other proton conducting solids.

Hydration

In-situ neutron diffraction

Impedance spectroscopy

Proton conductor

Författare

FRANCIS GACHAO KINYANJUI

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Stefan Norberg

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Istaq Ahmed

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Sten Eriksson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Stephen Hull

STFC Rutherford Appleton Laboratory

Solid State Ionics

0167-2738 (ISSN)

Vol. 225 312-316

18th International Conference on Solid State Ionics
Warsawa, Poland,

Ämneskategorier

Keramteknik

Styrkeområden

Energi

Materialvetenskap

DOI

10.1016/j.ssi.2012.05.018

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Senast uppdaterat

2021-07-20