組裝壓力與接觸阻抗對交趾式流道之質子交換膜燃料電池性能影響分析

Effects of clamping pressure and contact resistance on the performance of PEMFC with interdigitated flow field

任博川(Po-Chuan Jen)

指導教授 ： 陳發林

國立臺灣大學/工學院/應用力學研究所/碩士(2008年)

https://doi.org/10.6342/NTU.2008.00789

摘要

本研究是利用Comsol-Multiphysics建立的二維數值模型，對質子交換膜燃料電池之氣體擴散層進行計算分析。其中，所考慮的理論包含變形理論、流場、質量傳輸、以及電化學反應，並以有限元素法進行求解，藉由改變不同的組裝壓力，計算孔隙度、速度、濃度場以及接觸阻抗的變化，進一步探討對整體燃料電池性能的影響。研究結果發現，組裝壓力對電池的主要影響有二－氧氣傳輸效率以及接觸阻抗。高組裝壓力會使氣體擴散層的孔隙度變小，進而使氧氣傳輸變差，但太低的組裝壓力，則會造成接觸阻抗增加，造成過大的歐姆損失。故在最佳化設計上，組裝壓力是必須考慮的一項因素。

關鍵字

質子交換膜燃料電池 ； 氣體擴散層 ； 組裝壓力 ； 接觸阻抗 ； 氧氣傳輸效率

並列摘要

In this study, a two dimensional model built by Comsol-Multiphysics is used. It is applied to analyze gas diffusion layer of proton exchange membrane fuel cell. The theory includes large deformation theory, fluid field, species transport, and electrochemical reaction. The porosity, velocity, oxygen, and water vapor distribution in gas diffusion layer can be calculated with different clamping pressure. The results show that high clamping pressure will decrease the transport resistance, but low clamping pressure will increase the contact resistance between gas diffusion layer and bipolar plate. Therefore, clamping pressure needs to be considered in cell design.

並列關鍵字

proton exchange membrane fuel cell ； gas diffusion layer ； clamping pressure ； contact resistance ； transport resistance

參考文獻

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