Scholarlink

<p>Layered-perovskite oxide PrBaCo<sub>1.8</sub>Fe<sub>0.2</sub>O<sub>5+δ</sub> (PBCF) was successfully synthesized by sol–gel method. The crystal structure, surface chemical state, conductivity, and electrochemical performance of cathode materials were systematically investigated. X-ray photoelectron spectroscopy analysis revealed that Co ions exist in the mixed valence state of Co<sup>2+</sup>/Co<sup>3+</sup>/Co<sup>4+</sup>, while Fe ions in PBCF sample are predominantly in the Fe<sup>3+</sup>/Fe<sup>4+</sup> oxidation state. The PBCF sample exhibits superior electrochemical properties under working conditions, surpassing most previously reported PrBaCo<sub>2</sub>O<sub>5+δ</sub> cathode materials. Distribution of relaxation times analysis indicates that the charge exchange at the electrode/electrolyte interface becomes the primary rate-limiting step in the oxygen reduction process of PBCF cathode materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of Layered Perovskite PrBaCo1.8Fe0.2O5+δ Cathode for Intermediate-Temperature Solid Oxide Fuel Cell

  • 期刊论文

  • 发表日期：

    2025年5月7日

查看全文
  • Aofei Li,
  • Pingxiang Duan,
  • Dingshan Zhen,
  • Yue Xu,
  • Fushao Li,
  • YanYan Zhu,
  • Tong Wu,
  • Long Jiang,
  • Qiming Pei

摘要

Layered-perovskite oxide PrBaCo1.8Fe0.2O5+δ (PBCF) was successfully synthesized by sol–gel method. The crystal structure, surface chemical state, conductivity, and electrochemical performance of cathode materials were systematically investigated. X-ray photoelectron spectroscopy analysis revealed that Co ions exist in the mixed valence state of Co2+/Co3+/Co4+, while Fe ions in PBCF sample are predominantly in the Fe3+/Fe4+ oxidation state. The PBCF sample exhibits superior electrochemical properties under working conditions, surpassing most previously reported PrBaCo2O5+δ cathode materials. Distribution of relaxation times analysis indicates that the charge exchange at the electrode/electrolyte interface becomes the primary rate-limiting step in the oxygen reduction process of PBCF cathode materials.