能源化学(英文) ›› 2013, Vol. 22 ›› Issue (6): 928-934.

• ARTICLES • 上一篇    下一篇

A bird nest-like manganese dioxide and its application as electrode in supercapacitors

Fen Rana,b, Huili Fanb, Lingren Wanga, Lei Zhaoa, Yongtao Tanb, Xuanxuan Zhangb, Lingbin Konga, Long Kangb   

  1. a. State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, Gansu, China;
    b. Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
  • 收稿日期:2013-02-19 修回日期:2013-04-05 出版日期:2013-11-20 发布日期:2013-11-28
  • 通讯作者: Fen Ran, Long Kang
  • 基金资助:

    This work was supported by the National Natural Science Foundation of China (51203071, 51363014 and 21163010), the Key Project of Chinese Ministry of Education (212183), the Program for Hongliu Young Teachers in Lanzhou University of Technology (201201) and the Natural Science Funds for Distinguished Young Scholars of Gansu Province (1111RJDA012).

A bird nest-like manganese dioxide and its application as electrode in supercapacitors

Fen Rana,b, Huili Fanb, Lingren Wanga, Lei Zhaoa, Yongtao Tanb, Xuanxuan Zhangb, Lingbin Konga, Long Kangb   

  1. a. State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, Gansu, China;
    b. Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
  • Received:2013-02-19 Revised:2013-04-05 Online:2013-11-20 Published:2013-11-28
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51203071, 51363014 and 21163010), the Key Project of Chinese Ministry of Education (212183), the Program for Hongliu Young Teachers in Lanzhou University of Technology (201201) and the Natural Science Funds for Distinguished Young Scholars of Gansu Province (1111RJDA012).

摘要: A novel bird nest-like nanostructured MnO2 (BNNS-MnO2) was prepared by a facile and cost-effective strategy. Their structures and morphologies were characterized by field emission scanning electron microscopy, transmission electron microscopy and powder X-ray diffraction. Capacitive behaviors were investigated by cyclic voltammetry and galvanostatic charge-discharge. The obtained nano-MnO2 possesses a well designed loose-assembled hierarchical nanoarchitecture with an appropriate crystallinity which gives rise to excellent performances as an electrode material for supercapacitors. A maximum specific capacitance of 917 F/g has been obtained at a current density of 5 mA/cm2 in 6 mol/L KOH aqueous solution, and a specific capacitance of 210 F/g has been maintained for 500 cycles. As the low cost of MnSO4 and KCr2O7 and the low reaction temperature, the present method avoids the requirements for complicated operations, time/energy-consuming and expensive reagents, and perhaps is ready for the industrialization of nano-MnO2 production.

关键词: energy storage, nanostructured MnO2, supercapacitors, electrochemical performance, electrode material

Abstract: A novel bird nest-like nanostructured MnO2 (BNNS-MnO2) was prepared by a facile and cost-effective strategy. Their structures and morphologies were characterized by field emission scanning electron microscopy, transmission electron microscopy and powder X-ray diffraction. Capacitive behaviors were investigated by cyclic voltammetry and galvanostatic charge-discharge. The obtained nano-MnO2 possesses a well designed loose-assembled hierarchical nanoarchitecture with an appropriate crystallinity which gives rise to excellent performances as an electrode material for supercapacitors. A maximum specific capacitance of 917 F/g has been obtained at a current density of 5 mA/cm2 in 6 mol/L KOH aqueous solution, and a specific capacitance of 210 F/g has been maintained for 500 cycles. As the low cost of MnSO4 and KCr2O7 and the low reaction temperature, the present method avoids the requirements for complicated operations, time/energy-consuming and expensive reagents, and perhaps is ready for the industrialization of nano-MnO2 production.

Key words: energy storage, nanostructured MnO2, supercapacitors, electrochemical performance, electrode material