Supercapacitor Devices Based on Graphene Materials

作者：Wang, Yan; Shi, Zhiqiang; Huang, Yi; Ma, Yanfeng; Wang, Chengyang; Chen, Mingming; Chen, Yongsheng^*

来源：Journal of Physical Chemistry C, 2009, 113(30): 13103-13107.

DOI：10.1021/jp902214f

• ELECTROCHEMICAL CAPACITORS
• CARBON NANOTUBES
• ELECTRODE
• NITROGEN
• SURFACE
• PERFORMANCE
• PRINCIPLES
• NANOSHEETS

Graphene materials (GMs) as supercapacitor electrode materials have been investigated. GMs are prepared from graphene oxide sheets, and subsequently suffer a gas-based hydrazine reduction to restore the conducting carbon network. A maximum specific capacitance of 205 F/g with a measured power density of 10 kW/kg at energy density of 28.5 Wh/kg in an aqueous electrolyte solution has been obtained. Meanwhile, the supercapacitor devices exhibit excellent long cycle life along with similar to 90% specific capacitance retained after 1200 cycle tests. These remarkable results demonstrate the exciting commercial potential for high performance, environmentally friendly and low-cost electrical energy storage devices based on this new 2D graphene material.

• 出版日期2009-7-30
• 单位天津大学; 南开大学