傳統雙極板如石墨單/雙極板有成本高、重量重、體積大等缺點，不易應用於可攜式燃料電池。本實驗室發展的新型非均質碳纖維雙極板，配合特製MEA、pumpless及自然吸氣的設計所製成的燃料電池，很適合可攜式DMFC的應用比採用一般雙極板製電池組結構簡單且輕巧。

本實驗室應用新型碳纖維單極板，於可攜式直接甲醇燃料電池，設計並製作出雙層式16-cell可攜式DMFC 電源，不含燃料重量僅約50 g、體積75cm3，可將甲醇溶液直接儲存於陽極室的中空區作為燃料儲存槽，容量為17 ml，不須使用額外輔助設備，極適合可攜式燃料電池。此16-Cell電池組使用Nafion117、陽極觸媒為Pt/Ru，陰極觸媒為Pt含量各為5 mg/cm2，甲醇濃度3M、Pumpless、自然進氣及室溫下操作，16-Cell電池組總電極面積56㎝²初期輸出功率密度為10.3mW/cm2，總輸出功率可達578mW，其性能仍持續在改進當中。

There are several disadvantages in conventional unipolar/bipolar plates such as cost expensive, weight heavy and volume large. Therefore, it is difficult in making use conventional unipolar/bipolar plates to portable fuel cells. With a new heterogeneous carbon fiber bipolar plate, pumpless and air-breathing design and in cooperating with a special MEA, portable fuel cell stacks developed in our lab have made portable applications to be possible. The structure of the DMFC stack made with the new carbon fiber bipolar plate is much more simple and weight-light than the other designs.

A two-layer 16-Cell DMFC Stack had been designed and made by using the heterogeneous carbon fiber monopolar plates developed in our fuel cell laboratory. With this design, the methanol solution can be directly stored in the anode chamber which can store fuel 17 ml and does not need any auxiliary equipment, so it easy to apply to the portable power source. Not including fuel, total weight of stack is only 50g and the volume is 75 cm3. The 16 cell stack includes two pieces of 117 membrane, 16 anode electrodes loading Pt/Ru 5 mg/cm2 and 16 cathode Pt loading 5 mg/cm2. Each single cell electrode area is about 3.5 cm², so the total electrode area of the 16-cell stack is 56cm2. With methanol concentration 3 M, pumpless, air-breathing, and room temperature, the largest output power density of the fuel cell can reach 10.3 mW/cm², and the total power can reach 578 mW in this stage. The performance of the stack will be further improved in the next stage.

目錄………………………………………………………………………I
圖目錄…………………………………………………………………..IV
表目錄………………………………………………………………….VI
附錄…………………………………………………………………...VII
論文摘要（中文）…………………………………………………..VIII
論文摘要（英文）………………………………………………..IX
第一章 緒論 1
1.1 前言 1
1.2燃料電池的種類 3
1.3文獻回顧 6
1.4 研究目的 12
第二章 直接甲醇燃料電池（DMFC）理論分析 14
2.1 前言 14
2.2 直接甲醇燃料電池基本架構 16
2.2.1 膜極組( Membrane Electrode Assembly , MEA ) 16
2.2.1.1 質子交換膜 17
2.2.1.2 催化層 19
2.2.1.3 擴散層（diffusion layer） 21
2.2.2電流收集板 (Current Collector) 21
2.2.2.1 傳統石墨雙極板 22
2.2.2.2 金屬雙極板 22
2.2.2.3 非均質碳纖維束雙極板 23
2.2.2.4 碳纖維單/雙極板與石墨板的優劣比較 23
2.3直接甲醇燃料電池工作原理 25
2.3.1甲醇於DMFC中之理論消耗量 27
2.3.2燃料電池質傳現象 28
2.3.3 燃料電池極化現象 29
2.3.4 燃料電池的極化曲線(polarization curve) 30
第三章 低成本可攜式直接甲醇燃料電池組之設計與製作 32
3.1直接甲醇燃料電池組設計構想 32
3.2研發碳纖維單/雙極板之目的 33
3.2.1 新型雙極板之製作材料 33
3.2.2 碳纖維極板之製作流程 33
3.2.3 黏結劑選用原則 34
3.2.4 碳纖維束排電阻量測系統 35
3.3 MEA的製作 36
3.3.1 質子交換膜的前處理 36
3.3.2 阻絕質子交換膜離子橫移 36
3.3.3 電極的預備 37
3.4 可攜式直接甲醇燃料電池組設計和製作 38
3.4.1 電池組規格 39
3.4.2電池組設計規範 40
3.4.3 製作電池組框架的材質 42
3.5 結語 44
第四章 實驗結果與討論 45
4.1 MEA壓製條件對性能的影響 45
4.2 改善碳纖維與電極之間的接觸力對性能之影響 47
4.3燃料電池組穩定性研究 48
4.4單電池與16-Cell串聯的比較 48
第五章 結論 50
5.1 結論 50
5.2 未來可進行之工作 50
參考文獻 52

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