Crystal Structure, Hydration, and Two-Fold/Single-Fold Diffusion Kinetics in Proton-Conducting Ba0.9La0.1Zr0.25Sn0.25In0.5O3−a Oxide

Crystals

Xin Liu¹  Kun Zheng²  Wojciech Skubida²  Anna Niemczyk²  Konrad Świeczek² 

[1] Contemporary Amperex Technology Co., Limited, Fujian 352100, China;Faculty of Energy and Fuels, Department of Hydrogen Energy, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland;

关键词: perovskite oxides;    substituted barium indate;    hydration;    proton conductivity;    relaxation experiments;    coupled/decoupled ionic transport;   

DOI  :  10.3390/cryst8030136

来源: DOAJ

【 摘 要 】

In this work, hydration kinetics related to the incorporation of water into proton-conducting Ba0.9La0.1Zr0.25Sn0.25In0.5O3−a perovskite-type oxide are presented, with a recorded transition on temperature from a single-fold to a two-fold behavior. This can be correlated with an appearance of the electronic hole component of the conductivity at high temperatures. The collected electrical conductivity relaxation data allowed to calculate chemical diffusion coefficient D and surface exchange reaction coefficient k, as well as respective activation energies of their changes on temperature. Presented results are supplemented with a systematic characterization of the structural properties of materials synthesized at different temperatures, amount of incorporated water after hydration in different conditions, influence of water content on the crystal structure, as well as electrical conductivity in dry, H2O- and D2O-containing air, which enabled to evaluate proton (deuterium) conductivity.

【 授权许可】

Unknown