English  |  正體中文  |  简体中文  |  Items with full text/Total items : 74010/74010 (100%)
Visitors : 24071094      Online Users : 333
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65356

    Title: 金屬發泡材應用於質子交換膜燃料電池內流道之研究;Metal foam as flow field for proton exchange membrane fuel cell
    Authors: 薛穎睿;Hsieh,Ying-jui
    Contributors: 能源工程研究所
    Keywords: 質子交換膜燃料電池;多孔金屬流道;交流阻抗分析;Proton exchange membrane fuel cell;Metal foam flow channel;AC impedance analysis
    Date: 2014-08-27
    Issue Date: 2014-10-15 15:29:01 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本研究使用商用高溫型質子交換膜電極組Advent TPS®,搭配傳統蛇行流道石墨板與新型多孔金屬流道板,組成燃料電池,以探討操作溫度、氣體計量比、氣體預熱溫度及氣體加濕溫度對電池性能的影響,且利用交流阻抗分析,觀察電池內部現象的變化,並驗證其相對應之電化學機制。
    研究結果顯示,多孔金屬流道具有氣體滲透性高的特性,可以提升氣體的對流及擴散性,增加與白金觸媒反應的機會,且面密度高的金屬發泡材可以有效降低電池內部元件界面接觸阻抗,使電池性能在使用純氧氣於操作電壓0.6 V時,明顯較傳統蛇行流道高出40 %以上。而適度的增加操作溫度、氣體計量比及氣體加濕溫度,有助於提升燃料電池的性能表現。交流阻抗分析所使用的等效電路模型,可以確實的描述燃料電池之電化學機制,輔助我們對於性能的分析及判讀。
    ;This study used a commercial high temperature proton exchange membrane (PEM) electrode assembly Advent TPS®, with a conventional graphite serpentine flow channel and recently developed metal foam flow channel, to assemble a PEM fuel cell. Effects of operating temperature, stoichiometry, gas preheating temperature, humidification on cell performance are investigated. AC impedance analysis is also used to study the changes in various resistances inside the cell, and verify corresponding electrochemical mechanism.
    Results show that metal foam flow channel having high gas permeability improves gas convection and diffusion, and increase the chance of reaction with the platinum catalyst. The porous structure of metal foam can effectively reduce the contact resistance between the flow plate and carbon paper. The current density at 0.6 V is approximately 40 % higher than conventional graphite serpentine flow channel, when using oxygen as the oxidant. Increasing the operating temperature, stoichiometry, or humidification, improved the cell performance. The equivalent circuit model of AC impedance used in the analysis can describe the electrochemical mechanism of fuel cell.
    In long time operation test, we observe the performance began to decline after 200 hours, and is mainly related to the decay of catalyst.
    Appears in Collections:[能源工程研究所 ] 博碩士論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明