Anthraquinone on Porous Carbon Nanotubes with Improved Supercapacitor Performance
Anthraquinone on Porous Carbon Nanotubes with Improved Supercapacitor Performance
复制标题
多孔碳纳米管上的蒽醌可改善超级电容器性能
DOI：
10.1021/jp5009626
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发表时间：
2014-04-24
影响因子：
3.7
通讯作者：
Guo, Zhanhu
中科院分区：
文献类型：
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作者：
Chen, Xiao;Wang, Huanwen;Guo, Zhanhu
以蒽醌（AQ）分子修饰实验室制备的分级多孔碳纳米管（HPCNTs），制备了超级电容器电极材料（AQ-HPCNTs）。在1 A g-1的电流密度下，AQ-HPCNTs（质量比7：5）电极的比电容为710 F g-1，远大于未改性的HPCNTs（304 F g-1）。即使在20 A g-1的高放电电流密度下，AQ-HPCNTs（质量比7：5）电极的比电容仍高达419 F g-1，表明优异的倍率性能。此外，所有AQ-HPCNTs电极都表现出较长的循环寿命。AQ在HPCNTs表面的电化学行为显示出双对氧化还原峰，红外光谱支持了两种类型的π-π堆积相互作用。AQ-HPCNTs电极材料具有良好的电容性能。
Anthraquinone (AQ) molecules were selected to decorate the lab-made hierarchical porous carbon nanotubes (HPCNTs) to obtain electrode materials (AQ-HPCNTs) for supercapacitors, which showed a remarkable capacitance increment in comparison with pure HPCNTs when tested in 1 M H2SO4 aqueous solution. At a current density of 1 A g–1, the AQ-HPCNTs (mass ratio 7:5) electrode showed an ultrahigh specific capacitance of 710 F g–1, which is much larger than that of the unmodified HPCNTs (304 F g–1). Even at a high discharge current density of 20 A g–1, the specific capacitance of the AQ-HPCNTs (mass ratio 7:5) electrode was still as high as 419 F g–1, indicating an excellent rate capability. Furthermore, all the AQ-HPCNTs electrodes exhibited a long cycle life. Electrochemical behaviors of AQ on the HPCNTs’ surface showed a double pair of redox peaks, which are appropriate for two types of π–π stacking interactions supported by infrared spectra. The excellent capacitive behaviors of the AQ-HPCNTs electrode materi...