PDF《聚苯胺/碳纳米纤维复合材料的制备及电容性能》

聚苯胺/碳纳米纤维复合材料的制备及电容性能 张雷勇1 何水剑1 陈水亮1 郭乔辉2 侯豪情1,* (1 江西师范大学化学化工学院, 南昌 330022;

2 中国科学院长春应用化学研究所, 长春 130022) 摘要: 采用原位聚合法制备了聚苯胺/碳纳米纤维(PANI/CNF)复合材料, 用傅里叶变换红外(FT?IR)光谱、 热 重分析(TGA)、 扫描电镜(SEM)和孔分布及比表面积测定仪研究了复合材料的表面官能团、 组成、 表面形貌及比 表面积, 并运用循环伏安(CV)法和计时电位法测试了 PANI/CNF 布作为电极材料的电化学性能.

研究结果表 明: PANI/CNF复合材料具有粗糙的毛刺结构, PANI沿碳纳米纤维均匀分布;

PANI/CNF电极氧化还原反应的 可逆性良好;

在100 mA・g-1 电流密度下, 当PANI 含量为 44.4%(w)时, 复合材料比电容量高达 587.1 F・g-1 , 比能量为 66.1 Wh ・ kg-1 , 电流密度为800 mA ・ g-1 时比功率可达1014.2 W ・ kg-1 ;

在5 A ・ g-1 的电流密度下,

1000 次循环充放电后, 复合材料的比电容量衰减28%. PANI/CNF复合材料具有良好的导电性和快速充放电能力, 是一种优良的超级电容器电极材料. 关键词: 碳纳米纤维布;

聚苯胺;

电化学性能;

比电容量;

复合材料 中图分类号: O646 Preparation and Electrochemical Properties of Polyaniline/Carbon Nanofiber Composite Materials ZHANG Lei?Yong1 HE Shui?Jian1 CHEN Shui?Liang1 GUO Qiao?Hui2 HOU Hao?Qing1,* (1 College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China;

2 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China) Abstract: Polyaniline/carbon nanofiber (PANI/CNF) composite materials were prepared by in situ polymerization. The functional group, composition, surface morphology, and specific surface area of composite materials were characterized by Fourier transform infrared (FT?IR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Brunauer?Emmelt?Teller analysis. Cyclic voltammetry (CV) and galvanotactic charge?discharge methods were used to study the electrochemical properties of the PANI/ CNF composite materials. Results showed that the composite materials had a rough surface with a burry PANI structure that was uniformly distributed over the CNF. The composite materials, as electrodes, showed good reversibility in redox reactions. The specific capacitance of 44.4%(w) PANI/CNF was 587.1 F ・ g-1 , the specific energy was 66.1 Wh ・ kg-1 at a current density of

100 mA ・ g-1 , and the specific power was 1014.2 W ・ kg-1 at a current density of

800 mA ・ g-1 . Moreover, the specific capacitance of PANI/CNF only decreased by 28% after

1000 charge?discharge cycles. Therefore, the PANI/CNF composite material is an excellent material for use in supercapacitors because of its high electrical conductivity and large specific capacitance. Key Words: Carbon nanofiber mat;

Polyaniline;

Electrochemical property;

Specific capacitance;

Composite material [Article] www.whxb.pku.edu.cn 物理化学学报(Wuli Huaxue Xuebao) Acta Phys. ?Chim. Sin., 2010, 26(12): 3181-3186 December Received: June 4, 2010;

Revised: August 20, 2010;

Published on Web: October 15, 2010. ? Corresponding author. Email: [email protected];

Tel: +86?791?8120389. The project was supported by the Innovation Foundation of Jiangxi Normal University, China (YJS2010059). 江西师范大学校创新基金(YJS2010059)资助项目 ? Editorial office of Acta Physico?Chimica Sinica