Facile synthesis of a nitrogen-doped graphene flower-like MnO2 nanocomposite and its application in supercapacitors

Facile synthesis of a nitrogen-doped graphene flower-like MnO2 nanocomposite and its application... Article history: A flower-like MnO nanocomposite embedded in nitrogen-doped graphene (NG-MnO ) is fabricated by a 2 2 Received 19 April 2017 3 −1 hydrothermal method. It is a mesoporous nanomaterial with a pore size of approximately 0.765 cm g Received in revised form 21 July 2017 2 −1 and specific surface area of 201.8 m g . NG-MnO exhibits a superior average specific capacitance of Accepted 30 July 2017 −1 −1 −1 −1 220 F g at 0.5 A g and a preferable capacitance of 189.1 F g , even at 10 A g . After 1000 cycles, over Available online 2 August 2017 98.3% of the original specific capacitance retention of the NG-MnO electrode is maintained, and it can even activate a red light emitting diode (LED) after being charged, which indicates that it has excel- Keywords: lent cycling stability as an electrode material. This prominent electrochemical performance is primarily NG-MnO attributed to the nitrogen doping and mesoporous structures of NG-MnO , which can be attributed to its Hydrothermal method numerous electroactive sites as well as faster ion and electron transfer for redox reactions than general Specific capacitance graphene-MnO nanocomposites (G-MnO ). Cycling stability 2 2 © http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Facile synthesis of a nitrogen-doped graphene flower-like MnO2 nanocomposite and its application in supercapacitors

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2017.07.291
Publisher site
See Article on Publisher Site

Abstract

Article history: A flower-like MnO nanocomposite embedded in nitrogen-doped graphene (NG-MnO ) is fabricated by a 2 2 Received 19 April 2017 3 −1 hydrothermal method. It is a mesoporous nanomaterial with a pore size of approximately 0.765 cm g Received in revised form 21 July 2017 2 −1 and specific surface area of 201.8 m g . NG-MnO exhibits a superior average specific capacitance of Accepted 30 July 2017 −1 −1 −1 −1 220 F g at 0.5 A g and a preferable capacitance of 189.1 F g , even at 10 A g . After 1000 cycles, over Available online 2 August 2017 98.3% of the original specific capacitance retention of the NG-MnO electrode is maintained, and it can even activate a red light emitting diode (LED) after being charged, which indicates that it has excel- Keywords: lent cycling stability as an electrode material. This prominent electrochemical performance is primarily NG-MnO attributed to the nitrogen doping and mesoporous structures of NG-MnO , which can be attributed to its Hydrothermal method numerous electroactive sites as well as faster ion and electron transfer for redox reactions than general Specific capacitance graphene-MnO nanocomposites (G-MnO ). Cycling stability 2 2 ©

Journal

Applied Surface ScienceElsevier

Published: Jan 1, 2018

References

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