氣體擴散層雙側微孔層塗佈對PEM燃料電池低空氣濕度操作性能影響測試分析

Effects of gas diffusion layer with double-faced microporous layer coating on the performance of a PEM fuel cell under low air humidity conditions

黃冠閔(Guan-Min Huang)

指導教授 ： 張敏興

大同大學/工程學院/機械工程學系所/碩士(2012年)

摘要

本論文目的，在於測試分析在低空氣濕度條件下，陰極氣體擴散層雙側微孔層塗佈是否能有效提升燃料電池性能，並量測判斷最佳微孔層製作參數條件，包括PTFE含量與碳粉含量值，以及碳粉種類效應。實驗過程中使用不同規格碳粉進行微孔層製作與性能測試分析，而研究成果顯示，使用雙側微孔層確實比單側微孔層在低空氣濕度操作下，可得到較佳的性能表現。而在使用Acetylene black碳粉製作微孔層且碳紙兩側塗佈量(觸媒側/流道側)分別為1.2/0.3 mg/cm2及PTFE濃度為20 wt%時，燃料電池在低空氣濕度下可得到最佳的性能。本研究成果完整探討了雙側微孔層製作參數條件在低空氣濕度情況下，與燃料電池性能變化關係，並得到低濕度操作條件下雙側微孔層最佳的製作參數條件。研究成果有助於PEM燃料電池關鍵技術的研發，同時建立適合低濕度狀態下微孔層之製作參數條件，達到提升PEM燃料電池性能的研究目的。

關鍵字

空氣濕度 ； 微孔層 ； 質子交換膜燃料電池 ； PTFE濃度

並列摘要

In this paper, we have considered the effect of cathode GDL with MPL coatings on both sides and determined the optimal MPL design parameters including PTFE loading, carbon loading, and type of carbon powder by measuring the variations of cell performance. The experiments have been performed under different humidification conditions to evaluate the influence of GDL with MPL coatings on both sides and determine the optimal MPL structure and composition. Results have shown that the optimal cell performance under low air humidity condition could be obtained when the MPL is made of Acetylene black with the loadings of carbon powder 1.2/0.3 mg/cm2 on the surfaces facing to the catalyst layer/gas flow channel, respectively. The best PTFE content is also found to be 20 wt-% in both sides of MPL. The results benefit the research of key techniques of PEM fuel cell and help the establishment of optimal design parameters of MPL for running PEM fuel cell without air humidification device.

並列關鍵字

air humidity ； microporous lays ； PEMFC ； PTFE content

參考文獻

[21] 陳弘華，「空氣濕度對PEM燃料電池微孔層最佳製作參數影響測試分析

[20] J. Zhang, Y. Tang, C. Song, Z. Xia, H. Li, H. Wang, J. Zhang, “PEM

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