探測質子交換膜燃料電池隨時間變化的特性之電化學分析方法的建立

Development of Methodology to Probe the Time-dependent Characteristics of PEMFC by Electrochemical Methods

王勇文(Yung-Wen Wang)

指導教授 ： 張幼珍

元智大學/工程學院/化學工程與材料科學學系/碩士(2006年)

摘要

燃料電池是不必藉燃燒即可以高轉換效率將燃料之化學能轉換成電能的電化學裝置。耐久性(Durability)是目前質子交換膜燃料電池(polymer electrolyte membrane fuel cells, PEMFC)商業化的最大瓶頸之一。本研究主旨在以電化學分析方法，探討在陰極濕度固定下，不同的陽極濕度對於質子交換膜燃料電池效能隨時間的變化與影響。研究中將探討陽極端燃料氣體溼度對於電池隨時間的效能變化，電池效能與失效分析所使用的分析方法，包括循環伏安法(Cyclic Voltammetry)、極化曲線(polarization curve)、交流阻抗分析(electrochemical impedance spectroscopy)以及X光繞射(X-ray diffraction)，研究結果將進行效能衰退之可能機制(degradation mechanisms)的探討。

關鍵字

燃料電池 ； 耐久性 ； 電化學分析 ； 陽極氣體濕度 ； 電池效能

並列摘要

Fuel cell is an electrochemical device that transforms chemical energy of the fuel used to electricity at high efficiency without burning. The durability of polymer electrolyte membrane fuel cells (PEMFCs) is a major barrier to the commercialization of these systems. The aim of this study is to apply electrochemical analyses to investigate the effect of humidity of the fuel gas (hydrogen) on the performance of PEMFC. The humidity of the oxidant gas (oxygen) will be fixed throughout this study. Techniques used to characterize single cell performance include Cyclic Voltammetry (CV), polarization curve, electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD). Based on results obtained, degradation mechanisms will be discussed and proposed.

並列關鍵字

fuel cel ； , durability ； electrochemical analysis ； humidity of fuel gas ； cell performance

參考文獻

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