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

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Abstract

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-1cm-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.

Original languageEnglish
Pages (from-to)187-192
Number of pages6
JournalJournal of the Ceramic Society of Japan
Volume123
Issue number1436
DOIs
StatePublished - 1 Apr 2015

Keywords

  • Ceramics
  • EDTA-citrate complexing method
  • Hydrogen membrane
  • Solid-state reaction

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