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首页> 外文期刊>International journal of hydrogen energy >Sm_(0.5)Sr_(0.5)CoO_3-Ce_(1.8)Sm_(0.2)O_(1.9) electrodes enhanced by Sm_(0.5)Sr_(0.5)CoO_3 impregnation for proton conductor based solid oxide fuel cells
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Sm_(0.5)Sr_(0.5)CoO_3-Ce_(1.8)Sm_(0.2)O_(1.9) electrodes enhanced by Sm_(0.5)Sr_(0.5)CoO_3 impregnation for proton conductor based solid oxide fuel cells

机译:Sm_(0.5)Sr_(0.5)CoO_3-Ce_(1.8)Sm_(0.2)O_(1.9)电极通过Sm_(0.5)Sr_(0.5)CoO_3浸渍增强,用于基于质子导体的固体氧化物燃料电池

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摘要

Sm_(0.5)Sr_(0.5)CoO_(3-δ)-Ce_(0.8)Sm_(0.2)O_(2-δ) (SSC-SDC) composites, which are often used as the cathodes for solid oxide fuel cells (SOFCs) with oxygen-ion conducting electrolytes, have been recently shown to be also applicable in SOFCs based on proton conductors such as BaZr_(.01)Ce_(0.7)Y_(0.2)O_(3-δ) (BZCY). The electrochemical performances of blank SSC-SDC electrodes on BZCY electrolytes are substantially improved in this work by impregnating SSC nanoparticles additionally. When the loading increases, the interfacial polarization resistance of the symmetric cell decreases gradually at first, notably when it exceeds 14 urt.%, and to the lowest value at about 22 urt.%. Furthermore, impregnating SSC reduces the low-frequency-arc resistance that corresponds to the surface exchange step. In addition, impregnating SSC reduces the activation energy for oxygen reduction from 1.14 to 0.70 eV, thus resulting in significantly improvement on electrode performance at the reduced temperatures for SOFCs based on proton conductors.
机译:Sm_(0.5)Sr_(0.5)CoO_(3-δ)-Ce_(0.8)Sm_(0.2)O_(2-δ)(SSC-SDC)复合材料,通常用作固体氧化物燃料电池(SOFC)的阴极)含氧离子导电电解质,最近已证明也适用于基于质子导体的BaFC(如BaZr _(。01)Ce_(0.7)Y_(0.2)O_(3-δ)(BZCY)。通过额外浸渍SSC纳米粒子,可以显着改善BZCY电解质上空白SSC-SDC电极的电化学性能。当负载增加时,对称单元的界面极化电阻首先会逐渐减小,尤其是当其超过14 urt。%时,并逐渐降低,最低约为22 urt。%。此外,浸渍SSC减小了对应于表面交换步骤的低频电弧电阻。此外,浸渍SSC将氧还原的活化能从1.14 eV降低到0.70 eV,因此,在基于质子导体的SOFC的降低的温度下,电极性能得到了显着改善。

著录项

  • 来源
    《International journal of hydrogen energy》 |2014年第6期|2685-2691|共7页
  • 作者单位

    CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China;

    CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China,Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University,Hung Horn, Kowloon, Hong Kong, China;

    Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University,Hung Horn, Kowloon, Hong Kong, China;

    CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solid oxide fuel cells; Electrocatalyst impregnation; Composite cathode; Proton conductor; Reduced temperature;

    机译:固体氧化物燃料电池;电催化剂浸渍;复合阴极;质子导体降低温度;

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