A 3D hierarchical hybrid nanostructure of carbon nanotubes and activated carbon for high-performance supercapacitors
A 3D hierarchical hybrid nanostructure of carbon nanotubes and activated carbon for high-performance supercapacitors
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用于高性能超级电容器的碳纳米管和活性炭的 3D 分层混合纳米结构
DOI：
10.1039/c3ta14723a
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发表时间：
2014-02
影响因子：
11.9
通讯作者：
Di Zhang
中科院分区：
文献类型：
--
作者：
Fengyu Zhou;Qinglei Liu;Danmiao Kang;Jiajun Gu;Wang Zhang;Di Zhang
以钴（Co）纳米粒子为生长种子，通过化学气相沉积法在廉价活性炭（AC）基体上原位生长开口中孔碳纳米管（CNTs），制备了新型碳质杂化材料。碳纳米管与活性炭载体表面以Co纳米颗粒（<10 nm）为连接点，形成了牢固的结合。独特的三维混合结构使所得材料在1 A g−1时具有高达440 F g−1的可观比电容以及优异的倍率性能（与1 A g− 1相比，5 A g− 1时保持率为97%）。此外，该混合材料具有令人印象深刻的循环稳定性，在5 A g−1下3000次循环后，初始电容保持率为98.4%。除了高比表面积之外，这种优异的电容性能主要归因于（i）可以提供更有效的离子通道的良好分散的开口尖端CNT（5-12 nm），（ii）促进电子传输的互连CNT导电网络，和（iii）提供赝电容的超细Co纳米颗粒（3-9 nm）的组合，表明双电层电容和赝电容反应的协同效应。
Novel carbonaceous hybrid materials are fabricated through the in situ growth of open-tipped mesoporous carbon nanotubes (CNTs) on low-cost activated carbon (AC) substrates with cobalt (Co) nanoparticles as the growing seeds via a chemical vapor deposition process. The CNTs are strongly bonded with the surface of the AC supports using the fine Co nanoparticles (<10 nm) as the joints. The unique three-dimensional hybrid architectures enable the resultant materials to exhibit a considerable specific capacitance of up to 440 F g−1 at 1 A g−1 as well as an excellent rate performance (97% retention ratio at 5 A g−1 compared to 1 A g−1). In addition, the hybrid materials have an impressive cycling stability with an initial capacitance retention of 98.4% after 3000 cycles at 5 A g−1. Besides the high specific surface area, such an excellent capacitive performance is mainly attributed to the combination of (i) the well-dispersed open-tipped CNTs (5–12 nm) that could provide more effective ion channels, (ii) the interconnected CNT conducting networks facilitating the transport of electrons, and (iii) superfine Co nanoparticles (3–9 nm) offering pseudocapacitance, indicating the synergistic effect of both the electrical double layer capacitance and pseudocapacitive reactions.
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用于电化学能量转换和存储装置的纳米结构材料
影响因子：
29.4
作者：
Guo, Yu-Guo;Hu, Jin-Song;Wan, Li-Jun
通讯作者：
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影响因子：
3.7
作者：
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DOI：
10.2516/ogst:2006029a
发表时间：
2006-07
期刊：
Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles
影响因子：
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作者：
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通讯作者：
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影响因子：
16.6
作者：
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通讯作者：
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影响因子：
4.9
作者：
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通讯作者：
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