An efficient supercapacitor of three-dimensional MnO2 film prepared by chemical bath method

作者：Tian, Ying^*; Liu, Zongyu; Xue, Rong; Huang, Liping^*

来源：Journal of Alloys and Compounds, 2016, 671: 312-317.

DOI：10.1016/j.jallcom.2016.02.054

• Supercapacitor
• MnO2
• Chemical bath deposition
• Three-dimensional

MnO2 film is directly grown on Ni foam substrate by a facile chemical bath deposition method. The microstructure characterization of as-prepared MnO2 film is conducted by SEM, XRD and nitrogen adsorption and desorption measurements. The beta-MnO2 film consists of a large number of round nanoplatelets cross-linked with each other and forms 3D porous microstructure with a BET area of 80.6 m(2) g(-1) and an average pore diameter of 3.8 nm. The electrochemical performance of MnO2 film electrode is investigated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge measurements. The obtained MnO2 film electrode without binder additive shows excellent pseudocapacitance behavior, delivering the maximum capacitance of 1517 F g(-1) in KOH and 546 F g(-1) in KNO3 at a current density of 1 A g(-1). This study provides a facile method for preparation of three-dimensional MnO2 film with efficient supercapacitive properties.

• 出版日期2016-6-25
• 单位大连交通大学; 大连理工大学; 大连民族大学