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首页> 外文会议>Batteries and energy technology joint session (General) - 226th ECS meeting >Kinetic Studies on State of the Art Solid Oxide Cells - A Comparison between Hydrogen/Steam and Reformate Fuels
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Kinetic Studies on State of the Art Solid Oxide Cells - A Comparison between Hydrogen/Steam and Reformate Fuels

机译：最先进的固体氧化物电池的动力学研究-氢/蒸汽和重整燃料的比较

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摘要

Electrochemical reaction kinetics at the electrodes of Solid Oxide Cells (SOCs) were investigated at 700 ℃ for two cells with different fuel electrode microstructures as well as on a third cell with a reduced active electrode area. Three fuel mixtures were investigated - hydrogen/steam and reformate fuels hydrogen/carbon-dioxide and hydrogen/methane/steam. It was found that the kinetics at the fuel electrode were exactly the same in both reformates. The hydrogen/steam fuel displayed slightly faster kinetics than the reformate fuels. Furthermore the gas conversion impedance in the hydrogen/steam fuel split into two processes with opposing temperature behavior in the reformate fuels. An 87.5% reduction in active electrode area diminishes the gas conversion impedance in the hydrogen/steam fuel at high fuel flow rates. In both reformates, the second and third lowest frequency processes merged into a single process as the gas conversion was reduced. The SOC with finer electrode microstructure displayed improved kinetics.
机译：在700℃下，对具有不同燃料电极微观结构的两个电池以及在活性电极面积减小的第三个电池上的固体氧化物电池（SOCs）电极上的电化学反应动力学进行了研究。研究了三种燃料混合物-氢气/蒸汽和重整产品燃料氢气/二氧化碳和氢气/甲烷/蒸汽。发现在两种重整产品中，燃料电极处的动力学完全相同。氢/蒸汽燃料比重整燃料显示出更快的动力学。此外，氢气/蒸汽燃料中的气体转化阻抗分为两个过程，重整燃料中的温度行为相反。活性电极面积减少87.5％会减小高燃料流量下氢气/蒸汽燃料中的气体转化阻抗。在两种重整产品中，随着气体转化率的降低，第二和第三最低频率过程合并为一个过程。电极微观结构更细的SOC显示出改善的动力学。

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  • 会议地点 Cancun(MX)
  • 作者

    Jean-Claude Njodzefon; Christopher R. Graves; Mogens B. Mogensen; Andre Weber; Johan Hjelm;

  • 作者单位

    Department of Energy Conversion and Storage, Technical University of Denmark, Riso Campus, DK-4000 Roskilde, Denmark;

    Department of Energy Conversion and Storage, Technical University of Denmark, Riso Campus, DK-4000 Roskilde, Denmark;

    Department of Energy Conversion and Storage, Technical University of Denmark, Riso Campus, DK-4000 Roskilde, Denmark;

    Institut fuer Werkstoffe der Elektrotechnik, Karlsruher Institut fuer Technologie (KIT), D-76131 Karlsruhe, Germany;

    Department of Energy Conversion and Storage, Technical University of Denmark, Riso Campus, DK-4000 Roskilde, Denmark;

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