Material characterization and electrochemical performance of Sr(Ce0.6Zr0.4)0.8Y0.2O3−δ proton conducting ceramics prepared by EDTA-citrate complexing and solid-state reaction methods

I-Ming HUNG; Yen-Juin CHIANG; Sheng-Wei LEE; Jeng-Kuei CHANG; Jing-Chie LIN; Jason Shian-Ching JANG; Chuan LI; Chi-Shiung HSI

doi:10.2109/jcersj2.123.187

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Material characterization and electrochemical performance of Sr(Ce_0.6Zr_0.4)_0.8Y_0.2O_3−δ proton conducting ceramics prepared by EDTA-citrate complexing and solid-state reaction methods

I-Ming HUNG, Yen-Juin CHIANG, Sheng-Wei LEE, Jeng-Kuei CHANG, Jing-Chie LIN, Jason Shian-Ching JANG, Chuan LI, Chi-Shiung HSI

Author information

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

Keywords: Ceramics, Hydrogen membrane, Solid-state reaction, EDTA-citrate complexing method

JOURNAL FREE ACCESS

2015 Volume 123 Issue 1436 Pages 187-192

DOI https://doi.org/10.2109/jcersj2.123.187

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Abstract

In this study, Sr(Ce_0.6Zr_0.4)_0.8Y_0.2O_3−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(Ce_0.6Zr_0.4)_0.8Y_0.2O_3−δ ceramics are investigated. The conductivity of the Sr(Ce_0.6Zr_0.4)_0.8Y_0.2O_3−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(Ce_0.6Zr_0.4)_0.8Y_0.2O_3−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(Ce_0.6Zr_0.4)_0.8Y_0.2O_3−δ samples is good in water, no structure decomposition phenomenon is oberved.

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