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100mA·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587.1F·g-1,比能量为66.1Wh·kg-1,电流密度为800mA·g-1时比功率可达1014.2W·kg-1;在5A·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.
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.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2010年第12期3181-3186,共6页
Acta Physico-Chimica Sinica
基金
江西师范大学校创新基金(YJS2010059)资助项目~~
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
Carbon nanofiber mat
Polyaniline
Electrochemical property
Specific capacitance
Composite material
