本研究利用導電顆粒噴塗於平整的微孔層上，製作出類似微柱狀之結構，提高PEMFC 的性能，此製程最大的優點為適用於大面積電極的量產製作，改善了以奈米壓印技術製作微結構的缺點，如:脫模不易、製程複雜、成本高等問題。
使用直徑20um 的石墨球取代微柱結構，能使電池最大功率達636mW/cm2，提升約30%的電池性能；使用不同大小的導電顆粒，對電池性能也會有不同的影響，如:使用不規則石墨片取代微柱結構，可提升電池57%的性能，最大功率可達737mW/cm2。
為了解其提升性能與微結構的關係，必須了解催化層內水的分布與變化。先利用乾燥之氣體帶走電池內水份，使電極為缺水狀態後，由小電流至大電流反覆循環運作測試電池性能，再比較傳統平面結構電極與微結構電極性能表現上的差異，發現具微結構之電極於第四次循環時，性能明顯提升，判斷主要反應區域已逐漸轉移至微結構處，使得微結構的優點顯現。配合其它證據研判生成水研判催化層反應區域應該是由質子交換膜附近開始，逐漸往微孔層移動，而主要反應區亦隨之變化。

In this study, conductive particles will spray- coated onto the surface of the MPL to function as micro pillar structures that has been proved to be able to significantly increase the performance of a PEMFC. Contrast with the previously used nano imprint technology , the new method is cheap,fast, and especially suitable for the fabrication of large-area electrodes.
The results show that a 30% increase in performance can be acquired by using 20um graphite particles. An increase of 57%, max power of 737mW/cm2 , may be achieved with irregular graphite flakes.
The understanding of the distribution and the development of the produced water inside the cathode are essential to associate the
performance increase with the microstructures. The electrode is dried gradually until a sharp increase in its impedance appeared, which indicates that the surface of the PEM begins to lose water. Then, i-v performance is measured through a cyclic test, i.e. , form a small load current to a large one and, then, buck to the small again. The performance improved with each cycle, because more and more water is produced along the test. A large performance “jump” appearded at the 4th cycle only for the electrodes with the microstructure that indicates that the major reaction sites have shifted to the location of microstructures. It is concluded that, along with other evidence, a general water “surface” exists and migrates form PEM towards MPL.

目錄 ...................................................... I
圖目錄 ................................................... V
英文摘要 .................................................... VIII
中文摘要 .................................................... IX
第一章 緒論 ............................................. 1
1.1 前言 ................................................ 1
1.2 質子交換膜燃料電池優點介紹 .......................... 2
1.3 研究目的 ............................................ 3
1.4 文獻回顧 ............................................ 5
第二章 PEMFC 之介紹 ..................................... 9
2.1 PEMFC 之工作原理 ..................................... 9
2.1.1 反應機制 ........................................... 9
2.2 PEMFC 基本架構 ...................................... 10
2.2.1 雙極板 ............................................ 10
2.2.2 膜電極組(MEA ,Membrane Electrode Assemble) .......... 11
2.2.3 質子交換膜(Membrane) .............................. 12
2.3 燃料電池的極化現象 ................................... 13
第三章 實驗材料與設備介紹 ............................... 15
3.1 實驗材料 ............................................. 15
3.2 實驗設備 ............................................. 16
第四章 微結構電極製作步驟與性能量測 ..................... 21
4.1 電極材料前處理 ....................................... 21
4.1.1 質子交換膜 ........................................ 21
4.1.2 碳布(Carbon Cloth) .................................. 22
4.1.3 微孔層漿料(MPL ink)調配 ........................... 22
4.1.4 導電顆粒漿料(conductor pellet ink)調配 ................. 22
4.1.5 觸媒漿料(Catalyst ink)調配 ........................ 23
4.1.6 噴塗遮罩 .......................................... 23
4.2 微結構電極的製作 ..................................... 23
4.2.1 微孔層製作 ........................................ 23
4.2.2 立體顆粒狀斥水微結構製作 .......................... 24
4.2.3 觸媒層製作 ........................................ 25
4.3 熱壓MEA ............................................ 25
4.4 電池規格與燃料 ....................................... 26
4.4.1 燃料 .............................................. 26
4.4.2 電池規格 .......................................... 27
4.4.3 電池陰極排水裝置 .................................. 28
4.5 性能量測 ............................................. 28
4.5.1 電池組裝 .......................................... 28
4.5.2 量測電池性能 ...................................... 29
第五章 顆粒狀微結構介紹與實驗結果 ...................... 30
5.1 顆粒狀微結構介紹 ..................................... 30
5.2 實驗結果分析 ......................................... 31
第六章 電池性能提升探討 ................................. 34
6.1 討論 ................................................. 34
6.2 Sweeping test 量測 ................................... 35
6.2.1 電化學量測儀器設定 ................................ 36
6.2.2 Sweeping test 架設 ................................ 36
6.2.3 循環量測法 ........................................ 36
6.3 實驗結果分析 ......................................... 36
第七章 結論.............................................. 39
7.1 結論 ................................................. 39
7.2 未來研究方向 ......................................... 40
參考文獻 ................................................. 41

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