高等学校化学学报

高等学校化学学报

• 研究简报 • 上一篇    下一篇

固体氧化物燃料电池Cr毒化La0.8Sr0.2MnO3-δ(LSM)阴极机理

付长璟1, 孙克宁2, 张乃庆1, 周德瑞1   

    1. 哈尔滨工业大学应用化学系, 哈尔滨 150001;
    2. 北京师范大学材料科学工程系, 北京 100875
  • 收稿日期:2007-01-29 修回日期:1900-01-01 出版日期:2007-09-10 发布日期:2007-09-10
  • 通讯作者: 孙克宁

Mechanism of Chromium Poisoning of LSM Cathode in Solid Oxide Fuel Cell

FU Chang-Jing1, SUN Ke-Ning2*, ZHANG Nai-Qing1, ZHOU De-Rui1
   

    1. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China;
    2. Department of Materials Science & Engineering , Beijing Normal University, Beijing 100875, China
  • Received:2007-01-29 Revised:1900-01-01 Online:2007-09-10 Published:2007-09-10
  • Contact: SUN Ke-Ning

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摘要： 从电化学阻抗谱和阴极极化等方面对Cr毒化La0.8Sr0.2MnO3-δ(LSM)阴极机理进行了研究.

关键词: 固体氧化物燃料电池, 铬, 阴极, LSM

Abstract: Although metallic interconnects have many advantages, the formation of Cr2O3 scale and the evaporation of Cr(Ⅵ) species from alloys will greatly degrade the solid oxide fuel cell(SOFC) performance. In this paper, the electrochemical impedance spectroscopy(EIS) and the cathode polarization method of galvanostatic current interruption were employed to investigate the deposition mechanism of chromium with the electrochemical behavior of LSM cathode in the presence of chromia-forming alloys. The results show that the dissociative adsorption and the diffusion of oxygen on the LSM surface were inhibited by the gaseous chromium species and the migration processes of oxygen ions into YSZ electrolyte were inhibited by the solid chromium species deposited on the YSZ surface.

Key words: Solid oxide fuel cell, Chromium, Cathode, La0.8Sr0.2MnO3-δ

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