物理化学学报 >> 2014, Vol. 30 >> Issue (9): 1659-1666.doi: 10.3866/PKU.WHXB201406162

电化学和新能源 上一篇    下一篇

功能化石墨烯/聚苯胺复合电极材料的制备和电化学性能

汪丽丽, 邢瑞光, 张邦文, 侯渊   

  1. 内蒙古科技大学稀土学院, 内蒙古包头 014010
  • 收稿日期:2014-05-19 修回日期:2014-06-16 发布日期:2014-08-29
  • 通讯作者: 张邦文 E-mail:bangwenz@126.com
  • 基金资助:

    国家自然科学基金(51164026)和内蒙古科技大学创新基金(2012NCL007)资助项目

Preparation and Electrochemical Properties of Functionalized Graphene/Polyaniline Composite Electrode Materials

WANG Li-Li, XING Rui-Guang, ZHANG Bang-Wen, HOU Yuan   

  1. School of Rare Earth, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
  • Received:2014-05-19 Revised:2014-06-16 Published:2014-08-29
  • Contact: ZHANG Bang-Wen E-mail:bangwenz@126.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51164026), Inner Mongolia University of Science and Technology Innovation Fund, China (2012NCL007).

摘要:

利用水合肼还原十八胺(ODA)接枝的氧化石墨烯(GO),得到了十八胺功能化石墨烯(ODA-G),将ODAG与聚苯胺(PANI)通过溶液共混法,制备了功能化石墨烯和聚苯胺纳米复合材料(ODA-G/PANI). 采用傅里叶变换红外(FTIR)光谱、X射线衍射(XRD)、热重分析(TGA)、拉曼(Raman)光谱及透射电镜(TEM),对复合材料的结构和形貌进行了表征;利用循环伏安、恒流充放电及交流阻抗谱等,对复合材料的电化学性能进行了测试. 结果显示,少量ODA-G的引入为PANI 的电化学氧化还原反应提供了更多的电子通道和活性位置,有利于提高PANI 的赝电容. 在电流密度1.0 A·g-1下,2%(w)ODA-G/PANI 的比电容达到787 F·g-1,而相应的PANI 仅有426 F·g-1. 此外,ODA-G/PANI的循环稳定性也远高于纯PANI.

关键词: 功能化石墨烯, 聚苯胺, 超级电容器, 电化学性能, 溶液混合

Abstract:

Octadecylamine functionalized graphene (ODA-G) was synthesized by the grafting of graphene oxide (GO) with ODA followed by reduction with hydrazine hydrate. Subsequently, ODA-G/polyaniline (PANI) composites were prepared using a facile solvent-blending procedure. ODA-G and ODA-G/PANI composites were characterized by Fourier transform infrared spectrometry (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman spectroscopy, and transmission electron microscopy (TEM). The electrochemical properties of the composites were measured based on cyclic voltammetry (CV), galvanostatic charge/discharge, and ac impedance spectroscopy. The results show that ODA-G as a support material provides additional electron transfer paths, as well as active sites, for the electrochemical redox reaction of PANI, which helps to increase its pseudocapacitance. A specific capacitance of 782 F·g-1 is obtained for 2%(w)ODA-G/PANI at a current density of 1.0 A·g-1, compared with 426 F·g-1 for PANI. Furthermore, ODA-G/PANI exhibits better stability than PANI.

Key words: Functionalized graphene, Polyaniline, Supercapacitor, Electrochemical property, Solvent-blending

MSC2000: 

  • O646