Material characterization and electrochemical performance of Sr(Ce<sub>0.6</sub>Zr<sub>0.4</sub>)<sub>0.8</sub>Y<sub>0.2</sub>O<sub>3−δ</sub> proton conducting ceramics prepared by EDTA-citrate complexing and solid-state reaction methods

DOI Web Site 25 References
  • HUNG I-Ming
    Department of Chemical Engineering and Materials Science, Yuan Ze University
  • CHIANG Yen-Juin
    Department of Chemical Engineering and Materials Science, Yuan Ze University
  • LEE Sheng-Wei
    Institute of Materials Science and Engineering, National Central University Department of Mechanical Engineering, National Central University
  • CHANG Jeng-Kuei
    Institute of Materials Science and Engineering, National Central University Department of Mechanical Engineering, National Central University
  • LIN Jing-Chie
    Institute of Materials Science and Engineering, National Central University Department of Mechanical Engineering, National Central University
  • JANG Jason Shian-Ching
    Institute of Materials Science and Engineering, National Central University Department of Mechanical Engineering, National Central University
  • LI Chuan
    Department of Biomedical Engineering, National Yang-Ming University
  • HSI Chi-Shiung
    Department of Materials Science and Engineering, National United University

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  • Material characterization and electrochemical performance of Sr(Ce<sub>0.6</sub>Zr<sub>0.4</sub>)<sub>0.8</sub>Y<sub>0.2</sub>O<sub>3&minus;&delta;</sub> proton conducting ceramics prepared by EDTA-citrate complexing and solid-state reaction methods

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In this study, Sr(Ce0.6Zr0.4)0.8Y0.2O3−δ proton-conducting ceramics are synthesized both using the solid-state reaction (SSR) and ethylenediaminetetraacetic acid (EDTA)-citrate complexing methods. The crystal structure, electrical conductivity, electrochemical performance and hydrogen permeation of the Sr(Ce0.6Zr0.4)0.8Y0.2O3−δ ceramics are investigated. The conductivity of the Sr(Ce0.6Zr0.4)0.8Y0.2O3−δ prepared by EDTA-citrate complexing method is 0.0081 S/cm at 800°C, which is about twice that of sample prepared by SSR method (0.0039 S/cm). The hydrogen permeation flux of the Sr(Ce0.6Zr0.4)0.8Y0.2O3−δ prepared by EDTA-citrate complexing method increases from 1.102 to 1.745 ml min−1 cm−2 as the temperature increases from 500 to 800°C, which is higher than that of sample prepared by SSR method (0.574 to 1.466 ml min−1 cm−2). The structure stability of the all Sr(Ce0.6Zr0.4)0.8Y0.2O3−δ samples is good in water, no structure decomposition phenomenon is oberved.

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