Synthesis of SWCNT-GO/MnO<sub>2</sub> nanocomposites for use as electrodes of electrochemical capacitors by microwave and hydrothermal methods

WANG Ying-hui; QIU Han-xun; WANG Zhao; LI Jing; SHEN Xiao; YANG Jun-he

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Article Navigation > New Carbon Mater. > 2015 > 30(3): 214-221

WANG Ying-hui, QIU Han-xun, WANG Zhao, LI Jing, SHEN Xiao, YANG Jun-he. Synthesis of SWCNT-GO/MnO2 nanocomposites for use as electrodes of electrochemical capacitors by microwave and hydrothermal methods. New Carbon Mater., 2015, 30(3): 214-221.

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WANG Ying-hui, QIU Han-xun, WANG Zhao, LI Jing, SHEN Xiao, YANG Jun-he. Synthesis of SWCNT-GO/MnO₂ nanocomposites for use as electrodes of electrochemical capacitors by microwave and hydrothermal methods. New Carbon Mater., 2015, 30(3): 214-221.

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Synthesis of SWCNT-GO/MnO₂ nanocomposites for use as electrodes of electrochemical capacitors by microwave and hydrothermal methods

1.
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;
2.
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Funds: National Natural Science Foundation of China (51102167, U1260104); Shanghai Technology Talents Funds (11PJ1407200); Innovation Program of Shanghai Municipal Education Commission Program of China (12YZ101).

Received Date: 2015-01-10
Accepted Date: 2015-09-07
Rev Recd Date: 2015-06-02
Publish Date: 2015-06-28

Abstract

Abstract

HNO₃-oxidized single-wall carbon nanotubes (SWCNTs) and graphene oxide (GO) were ultrasonically dispersed in water to which potassium permanganate was added, and the resulting mixtures were treated under microwave radiation at 100℃ for 1h or hydrothermal conditions at 100℃ for 1, 5 and 10h to prepare SWCNT-GO/MnO₂ composites as electrode materials of electrochemical capacitors. Results indicate that the composite prepared using the microwave method has a higher specific capacitance (173F/g at 0.2A/g), lower pseudo-charge transfer resistance (1.425 Ω) and longer cyclic stability (3.74% capacitance loss after 1000 cycles at the scan rate of 20mV/s) than the ones prepared using the hydrothermal method. Moreover, the microwave method has the advantages of simplicity of operation and shorter heating time.
- Microwave synthesis,
- Hydrothermal synthesis,
- Carbon nanotube,
- Graphene oxide,
- MnO₂,
- Electrochemical performance

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References(23)

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