A facile route to growth of γ-MnOOH nanorods and electrochemical capacitance properties

Zhongchun Li; Hongling Bao; Xiaoyu Miao; Xuhong Chen

doi:10.1016/j.jcis.2011.02.011

A facile route to growth of γ-MnOOH nanorods and electrochemical capacitance properties

J Colloid Interface Sci. 2011 May 15;357(2):286-91. doi: 10.1016/j.jcis.2011.02.011. Epub 2011 Mar 4.

Authors

Zhongchun Li¹, Hongling Bao, Xiaoyu Miao, Xuhong Chen

Affiliation

¹ Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering, Changzhou 213001, PR China. czlizc@126.com

PMID: 21377162
DOI: 10.1016/j.jcis.2011.02.011

Abstract

Single crystal nanorods of γ-MnOOH with lengths up to hundreds of nanometers were successfully prepared employing a novel solvothermal process based on the redox reaction between potassium permanganate (KMnO(4)) and N, N-dimethyl ammonium formate (DMF) without extra surfactant or template. The as-prepared products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and Fourier transformed infrared spectroscopy (FTIR). The electrochemical properties of γ-MnOOH nanorods were investigated by cyclic voltammetry and galvanostatic charge-discharge performance measurements. Specific capacitance (C(s)) calculated from the galvanostatic discharge curve was 131.9 F g(-1) for γ-MnOOH nanorods at the current density of 0.5 A g(-1). The electrochemical experiment results demonstrate that γ-MnOOH nanorods should be a good candidate as electrode material for supercapacitor.