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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (3): 208-212. 上一篇    下一篇

研究论文

模板法制备的有序介孔Co3O4的电化学电容行为

吴 雯 王永刚 李 峰 夏永姚*

  

  1. (复旦大学化学系 上海 200433)

  • 投稿日期:2007-12-03 修回日期:2008-10-07 发布日期:2009-02-14
  • 通讯作者: 夏永姚

Electrochemical Capacitance Performance of Ordered Mesoporous Co3O4 Synthesized by Template Method

Wu, Wen Wang, Yonggang Li, Feng Xia, Yongyao*   

  1. (Chemistry Department and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433)
  • Received:2007-12-03 Revised:2008-10-07 Published:2009-02-14
  • Contact: Xia, Yongyao

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1963

被引次数

45

以介孔硅作为模板合成有序的介孔Co3O4, 在6 mol/L KOH电解液里进行电化学性能的测试. 结果表明具有有序介孔结构的Co3O4, 其比容量可以达到250 F/g, 大约为在550 ℃下直接煅烧Co(NO3)•6H2O所得的Co3O4容量的4倍. 其外该材料还表现出良好的倍率特性, 这一现象可归因于有序的介孔结构增大了有效的反应表面积, 同时有利于离子在其中传递.

关键词: 超级电容器, Co3O4, 介孔结构

Ordered crystallized Co3O4 nanoarrays were synthesized by replicating mesoporous silica template and its electrochemical capacitance performance was evaluated in 6 mol/L KOH electrolyte solution. Electrochemical tests results indicated that the ordered mesoporous structure of Co3O4 nanoarrays provide a capacitance of about 250 F/g, approximately four times larger than that of Co3O4 prepared by direct calcining Co(NO3)•6H2O at 550 ℃ and also exhibits a good rate capability. This is due to that the well ordered mesoporous structure provide large specific surface area and facilitates the fast transport of the electrolyte.

Key words: supercapacitor, Co3O4, mesoporous structure