固体高分子形燃料電池のフラッディングにおよぼす触媒層とガス拡散層の劣化の影響 Influence of Degradations of Catalyst Layer and Gas Diffusion Layer on Flooding in PEFC

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Regarding a polymer electrolyte fuel cell (PEFC), the influence of degradations of a catalyst layer and a gas diffusion layer which are parts of membrane electrode assembly (MEA) on electrode flooding was investigated. On a PEFC, high humidity operation is desired for high performance because it is necessary to contain much water in proton exchange membrane and ionomer at catalyst layer. Additionally, high gas utilization is required for high system efficiency. However, under these conditions, significant degradation in a cell performance is caused by water-flooding of electrodes. The purpose of this study is to investigate how the degradation of a catalyst layer and a gas diffusion layer give the influence to occur flooding on electrode. The single cell was generated at 0.3A/cm<sup>2</sup> under high humidity operation for 10000 hours. And the cell performance was evaluated as cell voltage, cell resistance, IV curves, gas crossover rate, electrochemical surface area and Oxygen gain in order to find which part of the cell dominates such cell degradation. Consequently, it is found that the gas diffusivity degradation finally dominates the decay of the cell performance and it is mainly caused not in the gas diffusion layer but in the catalyst layer.

収録刊行物

  • 電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society  

    電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society 128(3), 593-598, 2008-03-01 

    The Institute of Electrical Engineers of Japan

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各種コード

  • NII論文ID(NAID)
    10021130534
  • NII書誌ID(NCID)
    AN10136334
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03854213
  • NDL 記事登録ID
    9400913
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-794
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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