Highly enhanced capacitance of CuO nanosheets by formation of CuO/SWCNT networks through electrostatic interaction
Highly enhanced capacitance of CuO nanosheets by formation of CuO/SWCNT networks through electrostatic interaction
复制标题
通过静电相互作用形成 CuO/SWCNT 网络，高度增强 CuO 纳米片的电容
DOI：
10.1016/j.electacta.2013.04.110
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发表时间：
2013-08-01
影响因子：
6.6
通讯作者：
Peng, Xinsheng
中科院分区：
文献类型：
--
作者：
Liu, Yu;Huang, Hongwen;Peng, Xinsheng
利用静电相互作用在水溶液中制备了一系列CuO纳米片（NS）/单壁碳纳米管（SWCNT）均匀复合网络。通过使用各种电化学方法，包括循环伏安法（CV），恒电流充/放电曲线，和电化学阻抗谱的电容进行了研究。CuO NS/SWCNT网络在2 mV/s的扫描速率下通过CV显示出比CuO NS的71.0 Fg（-1）和SWCNT的25.3 Fg（-1）更好的比电容（137.6 Fg（-1））。CuO NS/SWCNT电极表现出良好的循环稳定性，在6 M KOH水溶液中在5 Ag-1的电流密度下1000次循环后的有效比电容为59.3 Fg（-1），是CuO NS电极25.1 Fg（-1）的两倍多。CuO纳米线/单壁碳纳米管互穿网络也成功地制备，表现出比电容以及循环稳定性的显着改善。可见，单壁碳纳米管在CuO NS溶液中的均匀分散显著提高了其电化学性能。(C)2013爱思唯尔有限公司保留所有权利。
series of uniform composite networks consisting of CuO nanosheets (NSs)/single-wall carbon nanotubes (SWCNT) were fabricated through a facile and green method with the aid of electrostatic interaction in aqueous solution. The capacitance was investigated by using various electrochemical methods including cyclic voltammetry (CV), constant-current galvanostatic charge/discharge curves, and electrochemical impedance spectroscopy. The CuO NSs/SWCNT networks show better specific capacitance (137.6 F g(-1)) by CV at a scan rate of 2 mV/s compared to 71.0 F g(-1) of CuO NSs, and 25.3 Fg(-1) of SWCNT. The CuO NSs/SWCNT electrodes exhibit good cycling stability with effective specific capacitance of 59.3 Fg(-1) after 1000 cycles in a 6M KOH aqueous solution at a current density of 5 Ag-1, which is over two times as 25.1 Fg(-1) of CuO NSs electrodes. CuO nanowires/SWCNT interpenetrating networks were also successfully prepared, demonstrating a significant improvement of specific capacitance as well as cycling stability. It is obvious that the homogenous dispersion of SWCNT in CuO NSs solution remarkably improves their electrochemical performance. (C) 2013 Elsevier Ltd. All rights reserved.