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???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
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dc.contributor.advisor | 郭景宗 | |
dc.contributor.author | Ji-Chieh Lin | en |
dc.contributor.author | 林義傑 | zh_TW |
dc.date.accessioned | 2021-06-08T06:26:16Z | - |
dc.date.copyright | 2006-07-28 | |
dc.date.issued | 2006 | |
dc.date.submitted | 2006-07-27 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/25715 | - |
dc.description.abstract | 本論文著重於質子交換膜型燃料電池(PEMFC)的關鍵---膜電極組,並一一做介紹,包含膜電極組的組成零件,質子交換膜(PEM)、觸媒層(CL)、氣體擴散層(GDL)、膜電極組(MEA)的製作方法以及測試的結果。在本論文中採用觸媒直接塗佈於質子交換膜上的作法(CCM)。薄膜上的觸媒層緊密的與質子交換膜接觸在一起,改善了觸媒層與質子交換膜中的接觸。為了克服使用直接塗佈漿料,質子交換膜會發生皺縮(sewlling)的現象,採用自製的夾具固定質子交換膜克服皺縮。
膜電極組採用Nafion117,(反應面積140mmX140mm),當陰極觸媒量0.6 ,陽極觸媒量0.5 。氫氣加濕90 ,電池操作溫度50 時擁有最佳性能,在0.644V下,電流密度285.7 ,產生36.04W。實驗結果反應出,陽極端的加濕比率對於電池操作在高電流密度下影響甚巨。 此研究也介紹了電池組的介紹、設計、製造與組裝,在電池組中包含了兩個電池以及水冷系統,在1V下電流密度250 ,產生68W。 本文對於MEA的製作方法不同於以往,可看出某些方法對於MEA性能有所改善,若能將這些製程制式化,甚至減少材料用量,則可對於燃料電池成本降低有所助益。 | zh_TW |
dc.description.abstract | The membrane electrode assembly (MEA) and the stacks play an important role on the performance of a proton exchange membrane fuel cell (PEMFC). In this work, MEAs were fabricated by catalyst coated substrate method and by catalyst coated membrane method. Experiments were carried out in this work to investigate the influence of operating conditions on the performance of Mea. The operating parameters include the catalyst loading, temperature of the cell, temperature of hydrogen humidification, H2/O2 ratio, etc.
The membrane electrode assembly was fabricated by coating the catalyst (Pt black) on the surface membrane directly to improve the continuity of interface between the catalyst film and the membrane. Nafion117 was adopted as the membrane electrode assembly with the active area of 140 mm x 140 mm. The optimum performance of the MEA made in this work was found to be 36.04 W at 0.644 V and 285.7 mA cm-2, corresponding to the conditions as: Pt loading at the cathode and at anode side is 0.6 and 0.5 mg cm-2, respectively; cell temperature of 50℃, and the hydrogen humidification temperature of 90℃. The single PEMFC and the two-cell stack type PEMFC were tested in this study to evaluate the correlation between the current density and the voltage. Experimental results show that as for the single-fuel PEMFC, the power output of MEA fabricated by catalyst coated substrate method is higher than which made by catalyst coated membrane method, to the extent around 30%. The system was operated for 8000 min continuously, with the current lowered down only about 2%. On the other hand, the power out of the two-cell stack type PEMFC per cell is slightly lower than that of the single cell system, owing to water choking inside the channel. Since the flow pattern of reactant gases in the two-cell stack is more complex than that in the single-cell unit, the heat insulation should be designed specifically to avoid the moisture condensation. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T06:26:16Z (GMT). No. of bitstreams: 1 ntu-95-R93522121-1.pdf: 12092138 bytes, checksum: a1cad2b5a8c72682d916e51a1b8fa4e0 (MD5) Previous issue date: 2006 | en |
dc.description.tableofcontents | 目 錄
致謝 I 摘要 III Abstract IV 圖目錄 X 表目錄 XIII 第一章 序論 1 1.1 前言 1 1.2 燃料電池簡介 1 1.3 燃料電池之特點 4 1.4 燃料電池之運作原理 5 1.5質子交換膜燃料電池(PEMFC) 8 1.6 文獻回顧 10 第二章 質子交換膜型燃料電池(PEMFC) 13 2.1 簡介 13 2.2 質子交換膜型燃料電池之結構 13 2.2.1膜電極組 14 2.2.2石墨雙極板 14 2.2.2.1雙極板功能與要求 15 2.2.2.2雙極板材質 16 2.2.2.3流道類型 17 2.2.3電流收集板 20 2.2.4端板 21 2.2.5氣密墊片 21 2.3 影響質子交換膜型燃料電池運作之關鍵技術 21 2.3.1質子交換膜型燃料電池內部水管理 21 2.3.2 質子交換膜型燃料電池內部熱管理 23 2.4 電池失效原因 25 2.4.1反極現象 25 2.4.2膜電極組破裂 26 2.5膜電極組 28 2.5.1基本構造 28 2.5.2氣體擴散層 30 2.5.2.1氣體擴散基材 31 2.5.2.2氣體擴散背層 32 2.5.3觸媒層 32 2.5.4固態高分子電解質 34 2.5.5膜電極組的反應機制 37 第三章 電池組設計與膜電極組製造 40 3.1 實驗目標 40 3.2 電池堆設計 41 3.2.1 端板(B) 43 3.2.2 電流收集板(D) 44 3.2.3 碳板(E、H、I、J) 45 3.2.4 膜電極組 46 3.2.5 氣密設計(C、F) 46 3.2.6 進氣方式 49 3.2.7 設計規格 51 3.2.8 水冷流道 52 3.3 膜電極組製作 53 3.3.1 噴塗原理 53 3.3.2 質子交換膜前處理 54 3.3.3 氣體擴散層疏水處理 55 3.3.4 氣體擴散背層塗佈 55 3.3.5 觸媒層塗佈 56 3.3.5.1 CCS膜電極組製程 56 3.3.5.2 CCM膜電極組製程 56 3.4自製夾具 57 第四章 實驗設備與方法 60 4.1 實驗設備與系統 60 4.1.1 燃料電池測試系統 60 4.1.2 噴塗設備 65 4.1.3 實驗材料 66 4.2 實驗步驟及方法 67 4.2.1 質子交換膜前處理 68 4.2.2 質子交換膜烘乾秤重 68 4.2.3 觸媒層塗佈 69 4.2.4 碳布疏水處理 71 4.2.5 氣體擴散層塗佈 72 4.2.6 熱壓結合 73 4.2.7 MEA活化處理 74 4.2.8 電池組裝 76 4.2.9 電池性能量測 76 第五章 實驗結果與討論 79 5.1 實驗變因設計 79 5.2 CCS製程與CCM製程比較 80 5.2 接觸電阻的影響 81 5.3 電池溫度的影響 83 5.4 氫氣加濕的影響 85 5.5 觸媒量的影響 88 5.6 流量的影響 89 5.7 電池組性能 90 第六章 結論 92 6.1結論 92 6.2未來工作與展望 93 參考文獻 96 | |
dc.language.iso | zh-TW | |
dc.title | 大面積質子交換燃料電池膜電極組直接塗佈製造技術研究 | zh_TW |
dc.title | Experimental Studies of Catalyst Coated Membrane Method within large Membrane Electrode Assomblies of PEMFC | en |
dc.type | Thesis | |
dc.date.schoolyear | 94-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 鄭榮和,張崴縉 | |
dc.subject.keyword | 質子交換膜型燃料電池,膜電極組,直接塗佈, | zh_TW |
dc.subject.keyword | PEMFC,MEA,CCM,nafion117, | en |
dc.relation.page | 99 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2006-07-28 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
Appears in Collections: | 機械工程學系 |
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