Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (18): 2185-2190. Previous Articles     Next Articles

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Co3O4/CoO/Co/石墨复合材料的制备及其电容性能研究

李艳华*,1,2,黄可龙1   

  1. (1 中南大学化学化工学院 长沙 410083)
    (2 长沙航空职业技术学院化工与信息工程系 长沙 410019)
  • 投稿日期:2010-11-05 修回日期:2011-04-14 发布日期:2011-05-04
  • 通讯作者: 李艳华 E-mail:liyanhua11@126.com
  • 基金资助:

    国家自然科学基金;湖南省教育厅科研基金;湖南省有色集团有色金属研究基金

Synthesis and Capacitance Performance of Co3O4/CoO/Co/graphite Composite

Li Yanhua*,1,2 Huang Kelong1   

  1. (1 College of Chemistry and Chemical Engineering, Central South University, Changsha 410083)
    (2 Department of Chemical Engineering and Information Engineering, Changsha Aeronautical Vocational and Technical College, Changsha 410019)
  • Received:2010-11-05 Revised:2011-04-14 Published:2011-05-04

Colloidal carbon spheres were prepared using glucose as precursor by hydrothermal synthetic route, and then Co3O4/CoO/Co/graphite composites are synthesized with colloidal carbon spheres. The composites possess different structures in comparison to materials prepared by other researchers with similar method. They consist of multilayer materials with spherical structures. The first, second, third and inner layer are Co3O4, CoO, Co and graphite, respectively. Electrochemical property of Co3O4/CoO/Co/graphite was studied by cyclic voltammetry and constant current charge-discharge. The results showed that capacitive performance of the composites results from pseudo-capacitance caused by redox reactions and electric double-layer capacitance. The specific capacitance of the material is 25.2 F•g-1, which is lower than that of Co3O4. However, the potential windows is -1.0~0.46 V, which is higher than that of Co3O4.

Key words: colloidal carbon sphere, hydrothermal method, composite, capacitance performance