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首页> 外文期刊>RSC Advances >Gas leak diffusion induced polarization in submicro/nanoscale non-tight electrolytes of solid oxide fuel cells
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Gas leak diffusion induced polarization in submicro/nanoscale non-tight electrolytes of solid oxide fuel cells

机译：气体泄漏扩散诱导亚微粒/纳米级非紧电解质的偏振片的固体氧化物燃料电池

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摘要

Solid oxide fuel cells with submicro/nanoscale electrolytes (mSOFCs) are attracting increasing attention since the ohmic energy loss arising from an ion-resistive electrolyte decreases significantly with decreasing thickness of the electrolyte interlayers. However, gas leak diffusion can be induced due to increasing microstructural flaws such as cracks and pinholes in thin electrolytes. Evaluation of the effects of gas leak diffusion through electrolyte on cell performance is thus an urgent demand. In this work, the effect of gas leak diffusion on concentration polarizations (CPs) is investigated quantitatively for both anodes and cathodes of SOFCs under various operating conditions. The results show that gas leak diffusion through electrolyte typically induces dominant cathode CP. The direct reaction of leaked H-2 and O-2 correlates has a large impact on both anode and cathode CP induced by gas leak diffusion. Lowering the operating temperature decreases CP induced by gas leak diffusion. Our work provides a quantitative model to evaluate the impact of gas leak diffusion in electrolytes on SOFC performance and facilitates the rational design of high performance mu SOFCs.
机译：具有亚微米/纳米级电解质（MSOFC）的固体氧化物燃料电池被吸引越来越长，因为离子电阻电解质引起的欧姆能量损失随着电解质中间层的厚度而显着降低。然而，由于薄电解质中的微观结构缺陷（例如薄电解质中的裂缝和针孔）增加，可以诱导气体泄漏扩散。因此，通过电解液对细胞性能的影响评价因此是一种迫切的需求。在这项工作中，在各种操作条件下定量对SOFC的阳极和阴极进行量度地研究燃气泄漏扩散对浓度偏振（CPS）的影响。结果表明，通过电解质的气体泄漏扩散通常诱导显性阴极CP。泄漏的H-2和O-2的直接反应相关的是对通过气体泄漏扩散引起的阳极和阴极CP的巨大影响。降低工作温度降低了气体泄漏扩散引起的CP。我们的作品提供了定量模型，以评估电解质对SOFC性能的电解质中的气体泄漏扩散的影响，并促进高性能MU SOFC的合理设计。

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  • 来源
    《RSC Advances》 |2016年第67期|共10页
  • 作者

    Niu Yinghua; Lv Weiqiang; Zhou Xingzhi; Huo Weirong; Ye Luhan; He Weidong;

  • 作者单位

    Univ Elect Sci &

    Technol Sch Energy Sci &

    Engn Chengdu 611731 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol Sch Energy Sci &

    Engn Chengdu 611731 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol Sch Energy Sci &

    Engn Chengdu 611731 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol Sch Energy Sci &

    Engn Chengdu 611731 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol Sch Energy Sci &

    Engn Chengdu 611731 Sichuan Peoples R China;

    Univ Elect Sci &

    Technol Sch Energy Sci &

    Engn Chengdu 611731 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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