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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 鄭淑芬(Soofin Cheng) | |
dc.contributor.author | Yueh-Chu Wang | en |
dc.contributor.author | 王悅筑 | zh_TW |
dc.date.accessioned | 2021-06-15T11:18:47Z | - |
dc.date.available | 2021-08-25 | |
dc.date.copyright | 2016-08-25 | |
dc.date.issued | 2016 | |
dc.date.submitted | 2016-08-18 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/49190 | - |
dc.description.abstract | 直接甲醇燃料電池因甲醇擁有高能量密度、不易揮發的特點而可作為可攜帶式電子產品的能量來源,此種電池的操作溫度低,也可以保持其中電解質質子交換膜的含水度。甲醇燃料電池的電解質為質子交換膜,需要將質子從陽極傳到陰極,也必須具備防止甲醇穿透的能力,才不會使電池陰極被毒化造成電壓降低以及電池壽命減短。商業化的質子交換膜Nafion® 具有高穩定性及不錯的質子傳導能力,但是其甲醇穿透度也高。為了克服甲醇穿透的問題,同時保有良好的質子傳導效果,本研究以介孔SBA-15作為Nafion質子交換膜的填充材料,使用溶劑揮發法添加介孔SBA-15材料進入Nafion®,製成複合膜。SBA-15材料的模板試劑可以當作質子的固態溶劑,也可以幫助質子傳導,因此在本研究中討論加入不同形貌的SBA-15材料、有無保留SBA-15的模板試劑、將SBA-15接上幫助質子傳導的磺酸根官能基、以及使用不同的溶劑來進行溶劑揮發對複合膜表現的影響。填充材料的性質以小角度X光繞射儀、氮氣吸脫附及掃描式電子顯微鏡來鑑定,複合膜的性質則以螺旋測微器量測其厚度、測量甲醇穿透度、質子傳導率、計算選擇率以及測量全電池表現來鑑定。 | zh_TW |
dc.description.abstract | Direct methanol fuel cell (DMFC) is considered a promising power supplier for various applications because of its high theoretical energy density of methanol, low emission, and moderate operation temperature. Generally, a high selective membrane with high proton conductivity and low methanol crossover is suitable for DMFC. Commercialized Nafion® exhibits high chemical stability and proton conductivity, but suffers high methanol crossover which leads to decrease of cell voltage and lifetime. In the present study, mesoporous SBA-15 silica was used as the additive of Nafion membrane. Mesoporous silica SBA-15 of different morphologies with and without surfactant are synthesized then imbedded into the Nafion® membrane by solvent-recasting procedure using N,N’-dimethylacetamide (DMAc) and 2-propanol (iPA) as the solvents. Pore directing agent of SBA-15, P123, can serve as nonaqueous proton transporter which may assist proton conductivity of composite membrane. The additive materials were characterized with powder-XRD, N2 sorption, and SEM. The characteristics of composite membranes prepared by solvent recasting procedure were examined with thickness from spiral micrometer, methanol permeability, proton conductivity, selectivity, and single cell performance test. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T11:18:47Z (GMT). No. of bitstreams: 1 ntu-105-R03223145-1.pdf: 7272227 bytes, checksum: 45a93257318600c8e9c57f343a223434 (MD5) Previous issue date: 2016 | en |
dc.description.tableofcontents | 中文摘要 i
Abstract ii Contents iii Table of Figures v List of Tables viii Chapter 1 Introduction 1 1.1 Fuel Cell 1 1.1.1 Components of Fuel Cells 3 1.1.2 Types of Fuel Cells 5 1.2 Direct Methanol Fuel Cell (DMFC) 11 1.2.1 Components of DMFCs 11 1.2.2 Factors Affecting Performances of DMFCs 14 1.2.3 Comparison of DMFC and H2-PEMFC 17 1.3 Proton Exchange Membrane 18 1.3.1 Commercially available proton exchange membranes 18 1.3.2 PFSA based membranes 20 1.3.3 Alternative polymer based membranes 25 1.4 Mesoporous Material 28 1.4.1 SBA-15 30 1.4.2 Functionalization of mesoporous silica 31 1.5 Purpose of this study 34 Chapter 2 Experimental 35 2.1 Reagents 35 2.2 Synthesis of fillers 36 2.2.1 Synthesis of SBA-15 with and without surfactant 36 2.2.2 Synthesis of platelet SBA-15 36 2.2.3 Synthesis of sulfonic acid functionalized platelet SBA-15 37 2.3 Preparation of composite membranes 37 2.3.1 Preparation of composites with DMAc 37 2.3.2 Preparation of composites with propan-2-ol 38 2.3.3 Pretreatment of composites before further testing 38 Chapter 3 Instrumentation 39 3.1 Powder X-ray diffraction 39 3.2 N2 adsorption–desorption isotherm 40 3.3 Scanning electron microscopy (SEM) and elemental mapping 42 3.4 Methanol permeability 42 3.5 Proton conductivity 43 3.6 Single cell performance 44 Chapter 4 Results and Discussion 47 4.1 Characterization of SBA-15 47 4.1.1 SBA-15 of different morphologies 47 4.1.2 Sulfonic acid functionalized p-SBA-15 50 4.2 Nafion®/SBA-15 composites 53 4.2.1 The effect of pore directing surfactant of SBA-15 54 4.2.2 Composites prepared with different morphologies of SBA-15 64 4.2.3 Composites prepared with different solvents 68 4.2.4 Composites prepared with functionalized SBA-15 82 4.2.5 Single cell test 86 Chapter 5 Conclusions 88 Chapter 6 References 90 | |
dc.language.iso | en | |
dc.title | Nafion®/SBA-15質子交換複合膜之製備及其於直接甲醇燃料電池電解質之應用 | zh_TW |
dc.title | Preparation of Nafion®/SBA-15 Composites as Proton Exchange Membranes and Their Applications in DMFC | en |
dc.type | Thesis | |
dc.date.schoolyear | 104-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 王錫福,陳浩銘,陳貴賢 | |
dc.subject.keyword | 直接甲醇燃料電池,質子交換膜,Nafion&reg,SBA-15,複合膜, | zh_TW |
dc.subject.keyword | Direct methanol fuel cell (DMFC),Proton exchange membrane (PEM),Nafion&reg,SBA-15,composite membrane, | en |
dc.relation.page | 92 | |
dc.identifier.doi | 10.6342/NTU201603298 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2016-08-20 | |
dc.contributor.author-college | 理學院 | zh_TW |
dc.contributor.author-dept | 化學研究所 | zh_TW |
顯示於系所單位: | 化學系 |
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