本文選題：電泳沉積　切入點(diǎn)：碳納米管　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：本文采用電泳沉積法制備了碳納米管/碳納米纖維/碳纖維復(fù)合電極以及氧化鎳/碳納米管/碳納米纖維/泡沫鎳復(fù)合電極,并研究了復(fù)合電極的制備方法、微觀形貌和電化學(xué)性能等。首先采用混酸法對碳納米管進(jìn)行了預(yù)處理,得到分散性良好的碳納米管/乙醇溶液;將同樣方法應(yīng)用于碳納米纖維的預(yù)處理,并通過添加金屬鹽離子,使其便于電泳沉積。采用索氏提取法對碳纖維進(jìn)行了脫漿處理,去除了碳纖維表面的上漿劑,提高了其導(dǎo)電性。通過掃描電鏡和電化學(xué)測試分析得出制備碳納米管/碳纖維復(fù)合電極的最佳沉積條件為沉積電壓20V,沉積時(shí)間5min。接著引入碳納米纖維制備了碳納米管/碳納米纖維/碳纖維復(fù)合電極,掃描電鏡結(jié)果表明,碳納米纖維可以在碳纖維表面形成一層中空的支架結(jié)構(gòu),增大了碳纖維基底的表面積,從而增大了碳納米管的沉積面積,進(jìn)而提升復(fù)合電極的比電容。電化學(xué)測試結(jié)果表明,其比電容可達(dá)176.4 F·g-1,相比于改性前提升了114%。采用電泳沉積法制備了氧化鎳/碳納米管/泡沫鎳復(fù)合電極,并進(jìn)一步引入碳納米纖維得到了具有多層結(jié)構(gòu)的復(fù)合電極。電鏡測試表明,電泳沉積可以在電極表面制備一層具有多孔網(wǎng)狀結(jié)構(gòu)的碳納米管網(wǎng)絡(luò),而碳納米纖維可以增大這層網(wǎng)絡(luò)的表面積,進(jìn)而提升復(fù)合電極的比電容。電化學(xué)測試結(jié)果表明,采用濃度為0.03 mg.L.1的碳納米纖維制備的復(fù)合電極的比電容高達(dá)1372.0 F.g-1,相比于改性之前提高了 27.4%。
[Abstract]:Carbon nanotube / carbon nanofiber / carbon fiber composite electrode and nickel oxide / carbon nanotube / carbon nanofiber / foamed nickel composite electrode were prepared by electrophoretic deposition. Firstly, carbon nanotubes were pretreated with mixed acid method to obtain a well-dispersed carbon nanotube / ethanol solution, and the same method was applied to the pretreatment of carbon nanofibers. By adding metal salt ions to make it convenient for electrophoretic deposition, the carbon fiber was demineralized by Soxhlet extraction method, and the sizing agent on the surface of carbon fiber was removed. The electrical conductivity of carbon nanotube / carbon fiber composite electrode was improved by SEM and electrochemical analysis. The optimum deposition conditions of carbon nanotube / carbon fiber composite electrode were as follows: deposition voltage 20 V, deposition time 5 min. Then carbon nanofibers were introduced to prepare carbon nanotubes. Micron / carbon nanofiber / carbon fiber composite electrode, The SEM results show that carbon nanofibers can form a hollow scaffold structure on the surface of carbon fiber and increase the surface area of carbon fiber substrate, thus increasing the deposition area of carbon nanotubes. The electrochemical test results showed that the specific capacitance of the composite electrode was up to 176.4 F g-1, which was 114% higher than that before modification. Nickel oxide / carbon nanotube / foamed nickel composite electrode was prepared by electrophoretic deposition. The composite electrode with multilayer structure was obtained by introducing carbon nanofibers. The results of electron microscopy showed that a layer of carbon nanotube network with porous network structure could be prepared on the electrode surface by electrophoretic deposition. Carbon nanofibers can increase the surface area of the network and then increase the specific capacitance of the composite electrode. The specific capacitance of the composite electrode prepared with 0.03 mg.L.1 carbon nanofibers was as high as 1372.0 F.g-1, which was increased by 27.4% compared with that before modification.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB383.1;TQ342.742

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本文編號：1651994