4.3 Article

Supercapacitor based on graphene and ionic liquid electrolyte

期刊

JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 15, 期 11-12, 页码 2581-2585

出版社

SPRINGER
DOI: 10.1007/s10008-010-1248-9

关键词

Graphene; Ionic liquid; Supercapacitor

资金

  1. National Natural Science Foundation of China [20673036, J0830415]
  2. Hunan Provincial Natural Science Foundation of China [09JJ3025]

向作者/读者索取更多资源

A new kind of supercapacitor by using chemical reduced graphene (CRG) as electrode material and ionic liquid with addition of acetonitrile as electrolyte is assembled and investigated. CRG materials with high surface area are prepared by chemical reduction of graphene oxide. The capacitive properties of the supercapacitor composed of the CRG and ionic liquid electrolyte are studied by electrical impedance spectroscopy, cyclic voltammetry and galvanostatic charge-discharge. With the combined advantages of graphene and ionic liquid, the supercapacitor shows perfect performance. The supercapacitor possesses wide cell voltage and good stability. The specific capacitance, energy density, and specific power density of the present supercapacitor are 132 Fg(-1), 143.7 Wh kg(-1), and 2.8 kW kg(-1), respectively. The results demonstrate the potential application of electrical energy storage devices with high performance based on this new kind of supercapacitor.

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