高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (12): 2845.doi: 10.7503/cjcu20130366

• 物理化学 • 上一篇    下一篇

聚苯胺纳米刺/掺氮空心碳球复合材料的制备及电容性能

高磊, 廖奕, 张小华, 陈金华   

  1. 湖南大学化学生物传感与计量国家重点实验室, 化学化工学院, 长沙 410082
  • 收稿日期:2013-04-22 出版日期:2013-12-10 发布日期:2013-07-02
  • 作者简介:张小华,女,博士,副教授,主要从事纳米材料电化学研究. E-mail:mickyxie@hnu.edu.cn;陈金华,男,博士,教授,主要从事纳米材料电化学研究. E-mail:chenjinhua@hnu.edu.cn
  • 基金资助:

    长江学者和创新团队发展计划(批准号:IRT1238);湖南省自然科学基金(批准号:12JJ2010);高等学校年轻教师成长计划(2012)和高等学校博士学科点专项科研基金(批准号:20110161110009)资助.

Preparation and Enhanced Electrocapacitive Properties of Polyaniline Nanothorns on the Surface of Nitrogen-doped Hollow Carbon Spheres

GAO Lei, LIAO Yi, ZHANG Xiao-Hua, CHEN Jin-Hua   

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • Received:2013-04-22 Online:2013-12-10 Published:2013-07-02

摘要:

以掺氮空心碳球(N-HCS)为骨架,通过化学氧化聚合法制备了聚苯胺纳米刺/掺氮空心碳球复合材料(PANI/N-HCS),采用扫描电子显微镜、透射电子显微镜和红外光谱仪等对样品的形貌、结构等进行了表征. 采用循环伏安、计时电位和交流阻抗等方法在1 mol/L H2SO4水溶液中考察了材料的电化学性能. 结果表明,PANI/N-HCS具有良好的电化学性能,在0.5 A/g电流密度下,PANI/N-HCS的比电容达346 F/g;当电流密度为20 A/g时,PANI/N-HCS比电容值为228 F/g,电容保持率为66%;在5 A/g电流密度下,经1000次充放电循环后,电容保持率为76%.

关键词: 聚苯胺, 空心碳球, 复合材料, 超级电容器

Abstract:

Polyaniline/nitrogen-doped hollow carbon spheres(PANI/N-HCS) nanocomposites were prepared via in situ polymerization of nano-sized polyaniline thorns on the surface of nitrogen-doped hollow carbon spheres. The morphology and structure of PANI/N-HCS were characterized by SEM, TEM and FTIR, respectively. The electrochemical capacitive behavior of PANI/N-HCS was investigated by cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy in 1 mol/L H2SO4 solution. The specific capacitance of PANI/N-HCS is 346 F/g at 0.5 A/g, which is higher than that of each individual component. In addition, PANI/N-HCS shows excellent power characteristics: the specific capacitance is as high as 228 F/g when the current density increases to 20 A/g, and the specific capacitance retains 66% compared to that of 0.5 A/g. The specific capacitance retains 76% after 1000 charge-discharge cycles.

Key words: Polyaniline, Hollow carbon sphere, Composite material, Supercapacitor

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