質子交換膜燃料電池(PEMFC)電極添加碳纖維的效能評估

Performance Evaluation Of Carbon Fiber Addition In PEMFC Electrode

陳鴻文(Hung-Wen Chen)

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(2002年)

摘要

本研究的目的在製作PEMFC電極，並以自製電極置備出的膜電極組(MEA)來評估電極效能。研究中在陰極(cathode)、陽極(anode)電極片中加入不同比例之碳纖維(carbon fiber)為變數探討所自製的電極效能。研究中利用電子顯微鏡觀察碳纖維長度及大小，最後，以單電池測試系統來作電極效能的評估。
在陽極與陰極－Pt loading分別為0.5mg/cm2和1.0 mg/cm2－的電極，並分別在陰、陽二極端添加不同含量的碳纖維，與Nafion® 117膜壓片形成的膜電極組，由單電池的測試結果顯示，在分別以氫氣和氧氣為燃料下，在陽極添加15%碳纖維時，氫氣背壓為10psi，氧氣背壓為20psi，電流密度為950 mA/ cm2時，可以得到0.45W/ cm2的功率輸出密度，另外在陰極添加30%碳纖維時，氫氣背壓為10psi，氧氣背壓為20psi，在電流密度為900 mA/ cm2時，可以得到0.49W/ cm2的功率輸出密度。

關鍵字

碳纖維 ； 膜電極組 ； PEMFC

並列摘要

The objective of this study is to experimentally determine the influence of carbon fiber addition into catalyst layers in cathode and anode on single cell performance. In this study, a base formulation containing carbon particle in the catalyst layer was used a reference in which no carbon fiber was present. All electrodes were with Pt loadings of 0.5(anode)/1.0(cathode) mg/cm2.
A series of experiments to examine the effect of different (carbon fiber/carbon particle originally contained in base formulation) ratio in anode with cathode formulation fixed. The result showed that with a 15% carbon fiber addition in anode, a maximum power density about 0.45 W/cm2 at backpressures of anode/cathode =10/20psi, compared to a maximum power density about 0.4 W/cm2 with the base formulation.
When anode formulation is fixed, carbon fiber addition to cathode resulted in a maximum power density about 0.49 W/cm2 with a 30% carbon fiber addition at backpressures of anode/cathode =10/20psi, compared to a maximum power density about 0.4 W/cm2 with the base formulation.
The results indicated that the addition of carbon fibers in both catalyst layers in anode and cathode help improve the performance compared to those without carbon fiber addition.

並列關鍵字

carbon fiber ； MEA ； 質子交換膜燃料電池

參考文獻

16. 董士平、黃炳照，台灣科技大學, 化工,第48卷第6期, 2001。

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