臺灣博碩士論文加值系統

在眾多儲能元件中，超級電容器為具有高充放電效率、高功率密度、及高循環壽命之元件。而在電極材料上，由於石墨烯具有優秀的導熱性、導電性及高比表面積等特性，而成為了超級電容器研究的熱門材料之一。但石墨烯本身會有自身聚集、介面阻抗的特性，導致其比表面積下降，而使其無法展現出優異的電容性能。致使目前石墨烯於超級電容的應用仍停留在學術研究，無法成功商業化的主因之一。本研究以多元醇還原法配合水熱合成法合成非晶態氧化錳/石墨烯/奈米碳管的奈米複合材料。利用氧化錳將奈米碳管黏附於石墨烯，避免其自身聚集的現象、提供更好的孔隙與介面性質最大化電解液與材料的接觸，提升比電容。在1 M Na2SO4電解液下，表現出優良的比電容(210F/g)特性；在1A/g的電流下，全元件之比電容可達33F/g。結果表明研究所開發之非晶態氧化錳/石墨烯/奈米碳管是具有潛力之電容材料，且有助於突破石墨烯於超級電容商業化應用之瓶頸。

Among many energy storage devices, supercapacitors are devices with high charge and discharge efficiency, high power density, and high cycle life. On the electrode material, graphene has excellent thermal conductivity, electrical conductivity and high specific surface area, which has become one of the most popular materials for super capacitor research. However, graphene itself has the property of self-aggregation and interface resistance, resulting in a decrease in its specific surface area, which makes it unable to exhibit excellent capacitance performance. As a result, the application of graphene to supercapacitors is still one of the main reasons for academic research and commercialization. In this study, the nanocomposites of amorphous manganese oxide/graphene/carbon nanotubes were synthesized by hydrothermal synthesis method using polyol reduction method. The use of manganese oxide to adhere the carbon nanotubes to the graphene, to avoid the phenomenon of its own aggregation, to provide better pore and interface properties to maximize the contact of the electrolyte and the material, increase the specific capacitance. In the 1 M Na2SO4 electrolyte, excellent specific capacitance (210F/g) characteristics are exhibited; at a current of 1 A/g, the specific capacitance of all components can reach 33 F/g. The results show that the amorphous manganese oxide/graphene/carbon nanotubes developed by the institute are potential capacitive materials and help to break through the bottleneck of the commercial application of graphene in supercapacitors.

摘要 I
Abstract II
第一章 前言 1
1.1研究背景 1
1.2研究動機 2
第二章 文獻回顧 3
2.1電化學電容器原理 3
2.1.1電容定義 3
2.1.2電雙層原理與結構 4
2.1.3贋電容原理 10
2.2 超級電容器簡介 13
2.3 超級電容器結構 15
2.3.1 電極材料 16
2.3.2 電解液 21
2.4 石墨烯簡介 24
2.4.1 石墨烯的結構 26
2.5 奈米碳管簡介 28
2.6錳氧化物於超級電容器之應用 32
2.6.1 錳氧化物的合成 34
第三章　研究方法 41
3.1 實驗藥品 41
3.2 檢測儀器 44
3.2.1 掃描式電子顯微鏡(Scanning Elecron Microscopy；FE-SEM) 44
3.2.2穿透式電子顯微鏡(Transmission Electron Micoroscopy；TME) 45
3.2.3 X-射線繞射分析儀(X-ray diffraction；XRD) 46
3.2.4 電化學分析儀(Electric Analysis Instrument) 47
3.3 實驗流程 48
3.3.1奈米碳管的前處理 49
3.3.2 非晶態氧化錳/石墨烯/奈米碳管之合成 50
3.3.3 複合式碳材料電極樣品製備 51
3.4 電化學分析實驗 52
3.5全元件封裝測試 53
第四章 結果與討論 54
4.1材料微結構之鑑定 55
4.1.1非晶態氧化錳/奈米碳管/石墨烯之材料鑑定 55
4.1.2 非晶態氧化錳/奈米碳管/石墨烯複合材料比例對表面結構之影響 56
4.1.3 非晶態氧化錳/奈米碳管/石墨烯複合材料成分分析 59
4.1.3非晶態氧化錳/奈米碳管/石墨烯複合材料顯微結構、成分分析 62
4.2石墨烯/奈米碳管/非晶態氧化錳不同比例對電容特性影響 66
4.2.1石墨烯與奈米碳管混和比對電容特性之影響 68
4.2.2不同含量非晶態氧化錳對電容特性之影響 71
4.2.3黏著劑PVDF對電容特性之影響 74
4.3全元件測試 78
第五章 結論與建議 82
第六章 參考文獻 84

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