Hydrothermal synthesis and electrochemical properties of MnO2 nanostructures

✍ Scribed by Ning Wang; Hongtao Pang; Hongrui Peng; Guicun Li; Xiguang Chen

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 206 KB
• Volume: 44
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200800619

✦ Synopsis

Abstract

Manganese oxide (MnO~2~) 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 MnO~2~ nanowires have been investigated. It is found that MnO~2~ nanowires can be evolved into MnO~2~ microrods with the reaction time/temperature increased. The electrochemical characterization of MnO~2~ nanostructures was carried out in 1 M Na~2~SO~4~ aqueous electrolyte at the scan rate of 10 mV s^‐1^. The results indicate that the MnO~2~ 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)