储能科学与技术 ›› 2013, Vol. 2 ›› Issue (5): 491-495.doi: 10.3969/j.issn.2095-4239.2013.05.007

• 研究及进展 • 上一篇    下一篇

三维网状石墨烯的制备及其在超级电容器中的应用

刘艳云, 张东   

  1. 同济大学材料科学与工程学院,上海 200092
  • 收稿日期:2013-04-27 修回日期:2013-06-17 出版日期:2013-10-19 发布日期:2013-10-19
  • 通讯作者: 张东,教授,博士生导师,E-mail:Zhangdng@tongji.edu.cn.
  • 作者简介:刘艳云(1984--),女,博士研究生,从事石墨烯基储能材料的研究,E-mail:123liuyy@tongji.edu.cn;
  • 基金资助:
    国家高技术研究发展计划(863)(2012AA030303)及上海市基础研究重点项目(12JC1408600)

Fabrication of three-dimensional structured graphene for supercapacitors

LIU Yanyun, ZHANG Dong   

  1. School of Material Science and Engineering,Tongji University,Shanghai 200092,China
  • Received:2013-04-27 Revised:2013-06-17 Online:2013-10-19 Published:2013-10-19

摘要: 以氧化石墨为原料,采用电化学还原和超声剥离法制备了三维网状石墨烯,电化学法是在交变场中用方波实现的,最终制得的石墨烯具有明确的三维连通多孔网络结构,孔的大小在亚微米至数微米之间,孔壁由非常薄的石墨烯片堆积而成.用该材料做超级电容器电极材料,用循环伏安法,恒流充放电,交流阻抗法测试电极的电容性能,当扫描速率为10 mV/s时,电容器比电容为140 F/g,等效电阻小于1 Ω,三维网状石墨烯具有性能稳定,充放电效率高,循环性能好,适合于大电流充放电等优良性能.

关键词: 氧化石墨, 三维网状石墨烯, 超级电容器

Abstract: Three-dimensional (3D) structured graphene (rGO) has been successfully fabricated from electrochemical reduction of graphite oxide (GO) and ultrasonic treatment. The material was characterized by atomic force microscopy, field emission scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results show well-defined and cross-linked structures of pores of several micrometers. The 3D-structured graphene was investigated as an electrode material for supercapacitors by using galvanostatic charge/discharge (DC) , cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). A specific capacitance as high as 140 F/g has been observed at scan rate of 10 mV/s, indicating excellent properties of high efficiency and cycle performance of the electrode materials.

Key words: graphite oxide, 3D framework graphene, supercapacitors

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