固体高分子形燃料電池の拡散インピーダンス解析によるカソード電極触媒表面の水膜厚さの推定 Estimation of Water Layer Thickness at the Cathode Catalyst Layer Surface of Polymer Electrolyte Fuel Cells from Diffusion Impedance Analysis

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We have analysed the diffusion impedance of a polymer electrolyte fuel cell (PEFC) by electrochemical impedance spectroscopy (EIS). As a result, we derive oxygen diffusion distance d adjacent to the cathode electrode (catalyst layer) assuming planar oxygen diffusion in a thin water layer unlike the conventional flooded-agglomerate model and gas phase diffusion model in a gas diffusion layer. The experimental results and their analyses show that δ agrees with a value reported from our previous ex-situ measurement. Moreover, δ gives reasonable concentration overpotentials. Increasing current density and gas humidification brings about the growth of S. It supports that δ corresponds to the thickness of the accumulated product water in liquid state at the cathode electrode. Thus EIS analysis of the diffusion impedance can be used to diagnose the water accumulation at the cathode electrode. This result enables the prediction of the flooding and drying-up of PEFCs and assures their stable operation.

収録刊行物

  • 日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B

    日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B 74(741), 1176-1182, 2008-05-25

    一般社団法人日本機械学会

参考文献:  15件中 1-15件 を表示

被引用文献:  3件中 1-3件 を表示

各種コード

  • NII論文ID(NAID)
    110006685231
  • NII書誌ID(NCID)
    AN00187441
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03875016
  • NDL 記事登録ID
    9528676
  • NDL 雑誌分類
    ZN11(科学技術--機械工学・工業)
  • NDL 請求記号
    Z16-109
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS 
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