High-power and high-energy-density flexible pseudocapacitor electrodes made from porous CuO nanobelts and single-walled carbon nanotubes.
High-power and high-energy-density flexible pseudocapacitor electrodes made from porous CuO nanobelts and single-walled carbon nanotubes.
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DOI：
10.1021/nn1030719
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发表时间：
2011-02
期刊：
影响因子：
17.1
通讯作者：
Xiao-juan Zhang;Wenhui Shi;Jixin Zhu;D. J. Kharistal;Weiyun Zhao;B. Lalia;H. Hng;Q. Yan
中科院分区：
文献类型：
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作者：
Xiao-juan Zhang;Wenhui Shi;Jixin Zhu;D. J. Kharistal;Weiyun Zhao;B. Lalia;H. Hng;Q. Yan
我们报道了一种简单的湿化学方法制备具有高比表面积和小晶粒的多孔CuO纳米带。将这些CuO NB与碳纳米管以适当比例混合以制备具有稳定循环性能的伪电容器电极，其在不同功率密度下显示出一系列高能量密度，例如，在1.25、6.25、25和50 kWh kg（-1）的功率密度下分别为130.2、92、44、25和20.8 W h kg（-1）。单壁碳纳米管（SWCNT）上的CuO柔性混合电极也使用SWCNT膜作为集流体制造。这些柔性电极显示出比由纯SWCNT制成的电极高得多的比电容，并且表现出更稳定的循环性能，例如，在1 M LiPF 6/EC：DEC中在5A g（-1）的电流密度下1000次循环后，混合电极的有效比电容>62 F g（-1），而在相同测试条件下纯SWCNT电极的比电容仅为23.6F g（-1）。
We report a simple wet-chemical process to prepare porous CuO nanobelts (NBs) with high surface area and small crystal grains. These CuO NBs were mixed with carbon nanotubes in an appropriate ratio to fabricate pseudocapacitor electrodes with stable cycling performances, which showed a series of high energy densities at different power densities, for example, 130.2, 92, 44, 25, and 20.8 W h kg(-1) at power densities of 1.25, 6.25, 25, and 50 k Wh kg(-1), respectively. CuO-on-single-walled carbon nanotube (SWCNT) flexible hybrid electrodes were also fabricated using the SWCNT films as current collectors. These flexible electrodes showed much higher specific capacitance than that of electrodes made of pure SWCNTs and exhibited more stable cycling performance, for example, effective specific capacitances of >62 F g(-1) for the hybrid electrodes after 1000 cycles in 1 M LiPF6/EC:DEC at a current density of 5 A g(-1) and specific capacitance of only 23.6 F g(-1) for pure SWCNT electrodes under the same testing condition.