Electrochemical deposition of nanostructured manganese oxide on hierarchically porous graphene-carbon nanotube structure for ultrahigh-performance electrochemical capacitors
Electrochemical deposition of nanostructured manganese oxide on hierarchically porous graphene-carbon nanotube structure for ultrahigh-performance electrochemical capacitors
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DOI：
10.1016/j.jpowsour.2012.10.037
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发表时间：
2013-03-01
影响因子：
9.2
通讯作者：
Hu, Chi-Chang
中科院分区：
文献类型：
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作者：
Li, Shin-Ming;Wang, Yu-Sheng;Hu, Chi-Chang
通过动电位沉积法，将活性非晶氧化锰（a-MnOx）均匀沉积在具有良好润湿性、高孔隙率和大表面积的3D石墨烯片-碳纳米管（GS-CNT）结构中。在分级多孔 GS-CNT 基质框架上具有超细花瓣（约 5-8 nm）的花状 a-MnOx 纳米结构不仅可以几乎完全利用 a-MnOx，而且还为高倍率充放电应用保留了足够的电导率和孔隙率。在3D GS-CNT材料上使用a-MnOx可产生1200 F g(-1)的MnOx比电容，远高于纯a-MnOx电极（C-S,C-Mn = 233 F g(-1)）。 a-MnOx/GS-CNT的比能量和比功率分别高达46.2 Wh kg(-1)和33.2 kW kg(-1)，表明我们的工作从概念上提供了一种制备由石墨烯、碳纳米管和各种电活性材料组成的多孔结构的高性能储能器件的方法。 (C) 2012 Elsevier B.V. 保留所有权利。
A 3D graphene sheet-carbon nanotube (GS-CNT) structure with a good wetting property, high porosity, and large surface area is homogeneously deposited with active amorphous manganese oxide (a-MnOx) by potentiodynamic deposition. The flowery a-MnOx nanostructure with ultra-slender petals (ca. 5-8 nm) on the framework of hierarchically porous GS-CNT matrix not only enables nearly full utilization of a-MnOx but also retains sufficient conductivity and porosity for the high-rate charge-discharge application. The use of a-MnOx on the 3D GS-CNT material produces a specific capacitance of MnOx of 1200 F g(-1) which is much-higher than that of a pure a-MnOx electrode (C-S,C-Mn = 233 F g(-1)). The specific energy and specific power of a-MnOx/GS-CNT are respectively as high as 46.2 Wh kg(-1) and 33.2 kW kg(-1), revealing that our work conceptually provides a way to produce porous structures composed of graphene, carbon nanotubes, and various electroactive materials for high-performance energy storage devices. (C) 2012 Elsevier B.V. All rights reserved.