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arXiv · 1206.6287

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

Qianli Chen·Artur Braun·Songhak Yoon·Nikolai Bagdassarov·Thomas Graule
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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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Qianli Chen, Artur Braun, Songhak Yoon, Nikolai Bagdassarov, Thomas Graule. 2012-06-27. Effect of lattice volume and strain on the conductivity of BaCeY-oxide ceramic proton conductors. https://doi.org/10.1016/j.jeurceramsoc.2011.02.014

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