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Electrochemical and microstructure properties of Er-doped CaZrO3

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Abstract

To understand electrochemical properties of the rare earth-doped CaZrO3 system in more detail, a solid-state electrolyte Er-doped CaZrO3 was successfully prepared using solid-state reaction method at the temperatures of 1673 K and 1823 K for 10 h. The microstructures and electrochemical properties of these materials were systemically investigated. The results from structural analysis showed that the electrolyte has a pure perovskite phase structure. According to the H/D isotope effect, protons were determined as the dominant charge carriers in hydrogen atmosphere between 773 and 1273 K. The electrochemical impedance spectroscopy test showed that ionic electrical conductivities are approximately 1.86 × 10−8 ~ 2.93 × 10−4 S/cm at 773 ~ 1273 K, and ionic conductance activation energy (Ea) is in the range of 0.823–1.416 eV, Furthermore, ionic electrical conductivity decreases with increasing Er2O3 doping amount, which is completely different from that of In2O3 or other dopant-doped CaZrO3. The abnormal phenomenon is associated with the defect association introduced by incorporation of Er2O3 into CaZrO3 lattice on the basis of the DFT calculation.

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Acknowledgements

Special thanks to Professor Guixiao Jia, one of our colleagues, who gave us a great help for DFT calculation in our work.

Funding

This work was supported by the National Science Foundation of China (Grant No. 51864038 and 51762036), the Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (Grant No. NJYT-19-A20), the Innovation Fund of Inner Mongolia University of Science and Technology (Grant No. 2017YQL01), the Natural Science Foundation of Inner Mongolia (2017BS0504), the Guide and Innovation Award Fund of Inner Mongolia Autonomous Region Science and Technology (Grant No. 2017CXYD-7), and the Scientific Research Fund of Higher Education in Inner Mongolia Autonomous Region (NJZY21381).

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Authors and Affiliations

  1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, Inner Mongolia, China

    Fei Ruan, Ruming Wu, Yang Li, Jinxiao Bao, Jianquan Gao, Fen Zhou, Min Xie, Pengfei Xu & Xiwen Song

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  1. Fei Ruan
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  2. Ruming Wu
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Correspondence to Fei Ruan or Jinxiao Bao.

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Ruan, F., Wu, R., Li, Y. et al. Electrochemical and microstructure properties of Er-doped CaZrO3 . Ionics 27, 3511–3520 (2021). https://doi.org/10.1007/s11581-021-04104-y

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  • DOI: https://doi.org/10.1007/s11581-021-04104-y

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