Formation and characterization of multi-walled carbon nanotubes/Co3O4 nanocomposites for supercapacitors
Formation and characterization of multi-walled carbon nanotubes/Co3O4 nanocomposites for supercapacitors
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DOI：
10.1016/j.matchemphys.2007.02.038
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发表时间：
2007-06
影响因子：
4.6
通讯作者：
Y. Shan;Lian Gao
中科院分区：
文献类型：
--
作者：
Y. Shan;Lian Gao
采用多壁碳纳米管（MWNTs）酸处理和Co(NO3)2在140℃正己醇溶液中原位分解相结合的方法，制备了一种新型的多壁碳纳米管/ co3o4复合超级电容器电极。通过TEM、XRD和电化学测试对样品进行了表征。MWNTs/ co3o4复合材料具有较高的电容性能，其最佳比电容可达200.98Fg−1，明显高于纯MWNTs的90.1Fg−1。不同MWNTs含量的复合材料表现为法拉第氧化还原电容行为到双层电容行为，这可能与复合材料的微观结构不同有关。
A novel type of multi-walled carbon nanotubes (MWNTs)/Co3O4composite electrode for supercapacitors has been prepared through a facile and effective method, which combined the acid treatment of MWNTs and in situ decomposition of Co(NO3)2in n-hexanol solution at 140°C. The samples are characterized by TEM, XRD and electrochemical testing, respectively. The MWNTs/Co3O4composites show high capacitor property, and their best specific capacitance is up to 200.98Fg−1, which is significantly greater than that of pure MWNTs (90.1Fg−1). With different MWNTs contents, they show Faradaic redox capacitive behavior to double-layer capacitive behavior, which may be due to the different microstructure of the composites.