期刊
ELECTROCHIMICA ACTA
卷 56, 期 25, 页码 9224-9232出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.07.142
关键词
Graphene; Carbon nanotube; Polyaniline; Nanocomposite; Supercapacitor
资金
- National Basic Research Program of China (973 Program) [2007CB209703]
- National Natural Science Foundation of China [20873064]
A film composed of graphene (GN) sheets, polyaniline (PANI) and carbon nanotubes (CNTs) has been fabricated by reducing a graphite oxide (GO)/PANI/CNT precursor prepared by flow-directed assembly from a complex dispersion of GO and PANI/CNT, followed by reoxidation and redoping of the reduced PANI in the composite to restore the conducting PANI structure. Scanning electron microscope images indicate that the ternary composite film is a layered structure with coaxial PANI/CNT nanocables uniformly sandwiched between the GN sheets. Such novel hierarchical structure with high electrical conductivity perfectly facilitates contact between electrolyte ions and PANI for faradaic energy storage and efficiently utilizes the double-layer capacitance at the electrode-electrolyte interfaces. The specific capacitance of the GN/PANI/CNT estimated by galvanostatic charge/discharge measurement is 569 F g(-1) (or 188 Fan(-3) for volumetric capacitance) at a current density of 0.1 A g(-1). In addition, the GN/PANI/CNT exhibits good rate capability (60% capacity retention at 10 A g(-1)) and superior cycling stability (4% fade after 5000 continuous charge/discharge cycles). (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据