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Effect of lattice volume and strain on the conductivity of BaCeY-oxide ceramic proton conductors

Type of publication Not peer-reviewed
Publikationsform Other publication (non peer-review)
Publication date 2012
Author Qianli Chen Artur Braun Songhak Yoon Nikolai Bagdassarov Thomas Graule,
Project Effect of lattice volume and imperfections on the proton-phonon coupling in proton conducting lanthanide transition metal oxides: High pressure and high temperature neutron and impedance studies
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Other publication (non peer-review)

Book Effect of lattice volume and strain on the conductivity of BaCeY-oxide ceramic proton conductors
Publisher arxiv, Cornell
ISBN arXiv:1206.6287v1
DOI arXiv:1206.6287v1

Open Access

URL http://arxiv.org/abs/1206.6287
Type of Open Access Repository (Green Open Access)

Abstract

In-situ electrochemical impedance spectroscopy was used to study the effect of lattice volume and strain on the proton conductivity of the yttrium-doped barium cerate proton conductor by applying the hydrostatic pressure up to 1.25 GPa. An increase from 0.62 eV to 0.73 eV in the activation energy of the bulk conductivity was found with increasing pressure during a unit cell volume change of 0.7%, confirming a previously suggested correlation between lattice volume and proton diffusivity in the crystal lattice. One strategy worth trying in the future development of the ceramic proton conductors could be to expand the lattice and potentially lower the activation energy under tensile strain.
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