• Preparation and electrochemical properties of SrCe0.4Zr0.4Yb0.2O2.9 electrolyte

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      https://www.ias.ac.in/article/fulltext/boms/035/06/0957-0960

    • Keywords

       

      Ceramics; fuel cells; solid state reactions; electromotive force; ionic conduction.

    • Abstract

       

      The perovskite Yb-doped strontium cerate–zirconate material, SrCe0.4Zr0.4Yb0.2O2.9, was prepared by solid-state reaction and the structure was characterized by X-ray diffraction. The calcination process of the powder was investigated by thermogravimetric/differential thermal analysis (TG–DTA). The high temperature conductivities were measured by d.c. four-probe technique in the temperature range from 500 to 950°C in wet hydrogen and effect of temperature on conductivity was investigated. The conductivity increased with the elevation of temperature from 500 to 950°C. The highest conductivity of 4.4 × 10-2 S.cm-1 was observed for SrCe0.4Zr0.4Yb0.2O2.9 at 950°C. The current–voltage (𝐼–𝑉) and current–power (𝐼–𝑃) characteristics of the single cell (H2, Pt/SrCe0.4Zr0.4Yb0.2O2.9/Pt, O2) at temperature range from 600 to 850°C were tested. With the temperature increasing from 600 to 850°C, the open circuit voltage (OCV) decreased from 1.164 to 1.073 V and the ionic transfer number decreased from 0.996 to 0.946. At 850°C, the maximum power density of 25.2 mW.cm-2 was observed.

    • Author Affiliations

       

      Juan Li1 Ruisong Guo1 Hong Jiang2

      1. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin 300072, China
      2. Guizhou Broadcasting and Television College, Guiyang 550004, China
    • Dates

       
  • Bulletin of Materials Science | News

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