Hydrothermal synthesis and electrochemical properties of MnO2 nanostructures

• Published in: Crystal research and technology (1979) Vol. 44; no. 11; pp. 1230 - 1234
• Main Authors: Wang, Ning, Pang, Hongtao, Peng, Hongrui, Li, Guicun, Chen, Xiguang
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag 01.11.2009; WILEY‐VCH Verlag
• Subjects: Aqueous electrolytes; crystal growth; electrochemical properties; hydrothermal; Manganese oxides; Micrometers; MnO2; Nanocomposites; Nanomaterials; Nanostructure; nanostructures; Nanowires; Reaction time
• ISSN: 0232-1300; 1521-4079
• DOI: 10.1002/crat.200800619

Manganese oxide (MnO2) nanowires with diameters of 40–50 nm and lengths up to several micrometers have been successfully synthesized through a simply hydrothermal route. The influences of synthetic parameters, such as reaction time, and reaction temperature, on the growth and morphologies of MnO2 nanowires have been investigated. It is found that MnO2 nanowires can be evolved into MnO2 microrods with the reaction time/temperature increased. The electrochemical characterization of MnO2 nanostructures was carried out in 1 M Na2SO4 aqueous electrolyte at the scan rate of 10 mV s‐1. The results indicate that the MnO2 microrods obtained when the reaction performed at 200 °C for 24 h showed the best performance for supercapacitor. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)