期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 13, 期 11, 页码 1166-1169出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2011.09.006
关键词
Supercapacitor; Potential window; Graphene film; Neutral electrolyte; Voltage
资金
- National Basic Research Program of China [2007CB209705]
- Natural Science Foundation of China [21006063, 21073120]
- Science and Technology Commission of Shanghai Municipality [10DZ1202702]
The potential stability windows of chemical converted graphene in different aqueous electrolyte solutions were investigated for the first time. Based on this result, a supercapacitor with a high voltage and long cycle-life was prepared with the hydrated graphene films in the neutral aqueous solution at the maximum voltage of 1.6 and even 1.8 V. The electrochemical performance of the obtained sample was systematically investigated by cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. According to the cyclic voltammetry, hydrated graphene film can still retain rectangular shape at the high scan rate of 0.5 V/s in the neutral aqueous electrolyte. At a galvanostatic charge/discharge rate of 1 or 200 A/g, the specific capacitance of 202.3 or 138.1 F/g was delivered, respectively. Furthermore, the EIS results also confirm its fast neutral ion diffusion and high operating frequency of 9.34 Hz. (C) 2011 Elsevier B.V. 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