Preparation and Electrochemical Properties of Polyaniline/Carbon Nanofiber Composite Materials
Preparation and Electrochemical Properties of Polyaniline/Carbon Nanofiber Composite Materials
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DOI：
10.3866/pku.whxb20101135
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发表时间：
2010
影响因子：
10.9
通讯作者：
Lei Zhang;Shuijian He;Shuilin Chen;Qiaohui Guo;Haoqing Hou
中科院分区：
文献类型：
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作者：
Lei Zhang;Shuijian He;Shuilin Chen;Qiaohui Guo;Haoqing Hou
采用原位聚合法制备了聚苯胺/碳纳米纤维(PANI/CNF)复合材料。用傅立叶变换红外光谱(FT-IR)、热重分析(TGA)、扫描电子显微镜(SEM)和Brunauer-EmMelt-Teller分析对复合材料的官能团、组成、表面形态和比表面积进行了表征。用循环伏安法(CV)和恒电流充放电方法研究了PANI/CNF复合材料的电化学性能。结果表明，该复合材料表面粗糙，具有均匀分布在碳纳米纤维上的埋入聚苯胺结构。复合材料作为电极在氧化还原反应中表现出良好的可逆性。44.4%(W)PANI/CNF的比电容为587.1 F.g(-1)，电流密度为100mA.g(-1)时的比能量为66.1W.kg(-1)，电流密度为800mA.g(-1)时的比功率为1014.2 W.kg(-1)。此外，经过1000次充放电循环后，PANI/CNF的比电容仅下降了28%。因此，PANI/CNF复合材料具有较高的电导率和较大的比电容，是一种性能优良的超级电容器材料。
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.