MnO2 nanotube and nanowire arrays by electrochemical deposition for supercapacitors

✍ Scribed by Hui Xia; Jinkui Feng; Hailong Wang; Man On Lai; Li Lu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 860 KB
• Volume: 195
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2010.01.075

✦ Synopsis

Highly ordered MnO 2 nanotube and nanowire arrays are successfully synthesized via a electrochemical deposition technique using porous alumina templates. The morphologies and microstructures of the MnO 2 nanotube and nanowire arrays are investigated by field emission scanning electron microscopy and transmission electron microscopy. Electrochemical characterization demonstrates that the MnO 2 nanotube array electrode has superior capacitive behaviour to that of the MnO 2 nanowire array electrode. In addition to high specific capacitance, the MnO 2 nanotube array electrode also exhibits good rate capability and good cycling stability, which makes it promising candidate for supercapacitors.