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

查看全文 作　　者：Fen [1,2]Ran;Huili [2]Fan;Lingren [1]Wang;Lei [1]Zhao;Yongtao [2]Tan;Xuanxuan [2]Zhang;Lingbin [1]Kong;Long [2]Kang

机构地区：[1]State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology;[2]Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education, Lanzhou University of Technology

出　　处：《Journal of Energy Chemistry》索引2013年第22卷第6期,共7页

基　　金：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);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

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

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