标题: | 奈米碳管/钴氧化物复合电极材料于超高电容器之应用研究 Fabrication of Nanostructured Carbon / Cobalt Oxide Composites and Their Applications in Supercapacitors |
作者: | 余芸铮 Yu, Yun-Cheng 曾俊元 Tseng, Tseung-Yuen 电子工程学系 电子研究所 |
关键字: | 四氧化三钴;奈米碳管;奈米复合材料;电泳法;水热法;超级电容;Co3O4;CNTs;Nanocomposites;Electrophoretic deposition;Hydrothermal method;Supercapacitors |
公开日期: | 2013 |
摘要: | 超级电容是一种具有高比电容值、高功率密度、快速充放电、可靠性高以及循环寿命长等特性的储能元件。近年来,具备高比表面积及多孔性之复合材料应用于超级电容上已被广泛的研究。 本论文实验过程中,初始先以水热法合成奈米碳管/钴氧化物复合材料,后续搭配电泳法使表面带有正电荷之复合材料沉积于镍基板上。制程中调整水热前驱液浓度、反应时间及退火处理等实验参数,进而找出最佳化制程条件,将奈米碳管/钴氧化物复合材料应用于超级电容之研究。实验结果显示,在硝酸钴前驱液2 mmol、水热反应时间8小时及温度180 oC之水热条件下,所合成之奈米碳管/钴氧化物复合材料具备有高比表面积之多孔性结构,其应用于超级电容器,具有高比电容值 705 F g-1 (3 A g-1) 及优异的循环寿命。 Supercapacitors are an energy storage device with high specific capacitance, high power density, quick charge/discharge time, long cycle life, and excellent cycle stability. In recent years, nanocomposites materials possess high specific surface and porous structure applied to serve as supercapacitor have been widely researched. In this thesis, we introduce the experiment process. First of all, the production of Co3O4/CNTs nanocomposites are synthesized by hydrothermal method. Next, the electrophoresis deposition method is used to deposit nanocomposites that with positive charge on nickel substrate. By adjusting precursor solution concentration, hydrothermal time, and annealing temperature in the process, we can find the optimized process condition and apply the Co3O4/CNTs nanocomposites to the research of supercapacitor. As the experimental results, in the hydrothermal condition of the cobalt nitrate precursor concentration 2 mmol, hydrothermal time 8 h, and hydrothermal temperature 180 oC, the synthesized Co3O4/CNTs nanocomposites have high specific capacitance (705 F g-1 at 3 A g-1) and excellent cycle stability. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT070150148 http://hdl.handle.net/11536/75277 |
显示于类别: | Thesis |