A bird nest-like manganese dioxide and its application as electrode in supercapacitors
A bird nest-like manganese dioxide and its application as electrode in supercapacitors作者机构：State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials Lanzhou University of Technology Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education Lanzhou University of Technology
出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)
年 卷 期：2013年第22卷第6期
页 面：928-934页
核心收录：
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学]
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)
主 题：energy storage nanostructured MnO2 supercapacitors electrochemical performance electrode material
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.
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