期刊
CHEMICAL ENGINEERING JOURNAL
卷 313, 期 -, 页码 1242-1250出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.11.018
关键词
Graphene; Nanocages; Porous structure; Hollow structure; Supercapacitors
资金
- National Natural Science Foundation of China [21606052]
- Provincial Natural Science Foundation of Guangdong [2014A030310179]
- Guangdong Province Education Department [YQ2015115]
- Guangdong Province [2014A020216046]
Hollow graphene-like nanocages are prepared by an efficient and scalable quasi chemical vapor deposition technique. The structure and morphology of the product are investigated by X-ray diffraction, Raman spectrum, scanning electron microscopy, transmission electron microscopy, X-ray photoelectric spectroscopy and nitrogen adsorption-desorption analysis. The supercapacitive performances for the electrode are investigated by cyclic voltammetry and charging-discharging methods. The hollow graphenelike nanocages have a near hollow sphere morphology and nanoporous frameworks. When evaluated for supercapacitor electrode, relatively high specific capacitance of 165.7 F/g and 283.1 F/g are obtained at current density of 1 A/g in 1 M KOH and 1 M H2SO4 electrolytes, respectively. In addition, desirable rate performance and good cycling stability are also demonstrated for the hollow graphene-like nanocages. (C) 2016 Elsevier B.V. All rights reserved.
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