探討氣體擴散層壓縮性質對高溫質子交換膜燃料電池性能之影響;Investigating the Effect of Compression Ratio of Gas Diffusion Layers on the Performance of High Temperature Proton Exchange Membrane Fuel Cells

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Title:	探討氣體擴散層壓縮性質對高溫質子交換膜燃料電池性能之影響;Investigating the Effect of Compression Ratio of Gas Diffusion Layers on the Performance of High Temperature Proton Exchange Membrane Fuel Cells
Authors:	吳欣蓉;WU, SHIN-RUNG
Contributors:	機械工程系研究所
Keywords:	高溫質子交換膜燃料電池;氣體擴散層;孔隙率;滲透率;High Temperature Proton Exchange Membrane Fuel Cell;Gas Diffusion Layer;Permeability;Porosity
Date:	2017
Issue Date:	2019-07-17
Publisher:	機械工程系研究所
Abstract:	在許多燃料電池種類當中，高溫質子交換膜燃料電池的操作溫度約在140℃~180℃，和低溫燃料電池相較之下會有較佳的反應動力學、高雜質耐受性且不需要加濕器，但在膜電極組的製作過程中還是會受到許多操作條件下的影響。質子交換膜的種類、白金負載量、黏合劑種類、氣體擴散層的滲透性及孔隙率等都是影響電池的因素。本研究先製作高溫質子交換膜燃料電池膜電極組，包含不同的白金負載、交換膜、氣體擴散層、黏合劑以進行電池的性能優化後，再探討氣體擴散層之壓縮量對性能之影響。藉由COMSOL Multiphysics模擬不同氣體擴散層壓縮率並與實驗數據校正。最後探討氣體擴散層之孔隙率、滲透率對電池性能影響及氣體擴散層之氣體濃度分佈、速度分佈。 In various types of fuel cells, high-temperature proton exchange membrane fuel cells (HT-PEMFCs), operating between 140 and 180°C, have the advantages of faster reaction kinetics, high tolerance to impurities, and no requirement of humidifiers when compared with low-temperature fuel cells. The performance of the membrane electrode assemblies of the HT-PEMFC is affected by many factors, including membranes, catalyst loadings, binders, and permeability and porosity of the gas diffusion layers (GDLs). In this study, membrane electrode assemblies with various manufacturing parameters are prepared to investigate the effect of GDL compression ratios on the performance of the HT-PEMFC. The parameters include catalyst loading, membrane type, GDL type, and binder.A mathematical model is developed to study the effect of permeability and porosity of the GDLs on cell performance. The experimental data is used to calibrate parameters of the model. Finally, the effects of porosity and permeability on the performance of the HT-PEMFC and distributions of gas concentration and velocity in the GDL are discussed..
Appears in Collections:	[機械工程學系] 學位論文

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