化学学报 ›› 2011, Vol. 69 ›› Issue (05): 503-507.    下一篇

研究论文

超级电容器电极材料γ-MnO2纳米管的制备及性能

陈智栋1,2,高兰1,曹剑瑜1,王文昌1,许娟*,1,2   

  1. (1常州大学化学化工学院 常州 213164)
    (2常州江工阔智有限公司 常州 213164)
  • 收稿日期:2010-08-07 修回日期:2010-09-18 出版日期:2011-03-14 发布日期:2010-11-11
  • 通讯作者: 许娟 E-mail:cjytion3@163.com
  • 基金资助:

    石墨烯负载纳米金属修饰的LiBH4储氢性能及催化机制研究;基于氧化铝摸板(AAO)技术的纳米电源的制备及其电化学性能研究

Preparation and Properties of γ-MnO2 Nanotubes as Electrode Materials of Supercapacitor

Chen Zhidong1,2 Gao Lan1 Cao Jianyu1 Wang Wenchang1 Xu Juan*,1,2   

  1. (1 Department of Chemical Engineering and Technology, Changzhou University, Changzhou 213164)
    (2 Changzhou Jiangsu Polytechnic University Qualtec Co. Ltd., Changzhou 213164)
  • Received:2010-08-07 Revised:2010-09-18 Online:2011-03-14 Published:2010-11-11
  • Contact: Juan Xu E-mail:cjytion3@163.com

采用化学沉积和500 ℃热处理的方法在多孔氧化铝(AAO)模板中成功地合成了超级电容器电极材料γ-MnO2纳米管. 运用XRD, SEM, TEM和N2吸附-脱附对实验制备的γ-MnO2纳米管进行了结构、形貌和比表面积分析. 通过循环伏安法(CV)和恒电流充放电测试在1 mol/L Na2SO4溶液中研究了γ-MnO2电极的电化学性能. 电化学实验结果表明: 在电流密度100 mA/g下, γ-MnO2电极的质量比容量可达到566 F/g|充放电循环1000次后, 电化学比容量仍然能够保持在90%以上. γ-MnO2纳米管具有优异的电化学性能, 是一种很有前景的超级电容器电极材料.

关键词: γ-MnO2纳米管, AAO模板, 超级电容器

γ-MnO2 nanotubes have been successfully synthesized by chemically depositing manganese hydroxide in anodic aluminum oxide (AAO) templates and thermally annealing at 500 ℃. The synthesized nanotubes have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption isotherm analysis. The electrochemical capacitance behavior of the γ-MnO2 nanotubes electrode was investigated by cyclic voltammetry and galvanostatic charge-discharge studies in 1 mol/L Na2SO4 solution. The electrochemical data demonstrate that the γ-MnO2 nanotubes display good capacitive behavior with a high specific capacitance of 566 F/g at a current density of 100 mA/g and a good specific capacitance retention of ca. 90% after 1000 continuous charge-discharge cycles, indicating that the γ-MnO2 nanotubes can be promising electroactive materials for supercapacitor.

Key words: γ-MnO2 nanotubes, AAO template, supercapacitor