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首页> 外文会议>Ionic and mixed conducting ceramics 10 >Electrochemical Frequency Modulation for Estimating Exchange Current Density in Solid Oxide Fuel Cells
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Electrochemical Frequency Modulation for Estimating Exchange Current Density in Solid Oxide Fuel Cells

机译：用于估算固体氧化物燃料电池交换电流密度的电化学调频

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Electrochemical frequency modulation (EFM) was applied for the first time to solid oxide fuel cells (SOFC) to obtain effective exchange current density and transfer coefficient values. Values obtained from EFM data were compared to values obtained from electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV). A kinetic model based on Butler-Volmer (B-V) equation was used as the basis for the analysis. It was found that the values obtained via EFM were in good agreement with EIS and Tafel analyses. The obtained values for a cell within a SOFC stack closely ranged from 11-16 mA cm~(-2) for effective exchange current density and 0.88 -1.3 for transfer coefficient with good repeatability.
机译：首次将电化学频率调制（EFM）应用于固体氧化物燃料电池（SOFC），以获得有效的交换电流密度和传递系数值。将从EFM数据获得的值与从电化学阻抗谱（EIS）和线性扫描伏安法（LSV）获得的值进行比较。基于巴特勒-沃尔默（B-V）方程的动力学模型被用作分析的基础。发现通过EFM获得的值与EIS和Tafel分析非常吻合。对于有效交换电流密度，SOFC堆中电池的获得值在11-16 mA cm〜（-2）的范围内，对于具有良好可重复性的转移系数，其获得的值在0.88 -1.3的范围内。

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  • 会议地点 San Diego(US)
  • 作者

    Debanjan Das; Derek M. Hall; Serguei N. Lvov;

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    Department of Energy Mineral Engineering, USA ,The EMS Energy Institute, USA;

    Department of Energy Mineral Engineering, USA ,The EMS Energy Institute, USA;

    Department of Energy Mineral Engineering, USA ,Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA ,The EMS Energy Institute, USA;

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