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Citation: WANG Yan-Zhi, PANG Fei-Yan, YANG Jing, XU Ying, HE Pin-Gang, FANG Yu-Zhi. Supercapacitors of Manganese Oxide-modified Aligned Carbon Nanotube Nanocomposite by Electrodeposition Method[J]. Chinese Journal of Applied Chemistry, ;2009, 26(6): 702-706. shu

Supercapacitors of Manganese Oxide-modified Aligned Carbon Nanotube Nanocomposite by Electrodeposition Method

1.
Department of Chemistry, East China Normal University, Shanghai 200062

Corresponding author: HE Pin-Gang,
Received Date: 13 June 2008
Available Online: 10 September 2008
Fund Project: 国家自然科学基金(20675031) (20675031)上海市科技委员会(0552nm042) (0552nm042)上海市浦江人才计划(06PJ14032)资助项目 (06PJ14032)

MnO₂ thin film was electrodeposited onto aligned carbon nanotubes(ACNTs) electrode in the electrolyte containing 0.2 mol/L Mn(CH₃COO)₂ and 0.1 mol/L Na₂SO₄ at pH=6.0.As observed by means of scanning electron microscopy,the resulting MnO₂ film on those nanotubes exhibited hole-like microstru-cture.Such-prepared MnO₂-modified ACNTs nanocomposite was then characterized by cyclic voltammograms,charge-discharge curve and electrochemical impedance measurements etc.,and it showed excellent capacitive behavior between 0~0.6 V(vs.Ag/AgCl) in 1 mol/L KCl aqueous solution.The specific capacitance of the ACNT electrode was calculated to be 16 F/g before the MnO₂ film modification,and increased to 330 F/g after the MnO₂ film deposition due to the special Faradic capacitance of MnO₂.After scaning for 200 cycles,there was a little change for its cyclic voltammogram curve,indicating good reversible and capacitive property of the MnO₂-ACNTs composite.
- aligned carbon nanotubes,
- supercapacitor,
- manganese oxide
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