Simultaneous reduction, exfoliation, and nitrogen doping of graphene oxide via a hydrothermal reaction for energy storage electrode materials
IR@CMERI: CSIR- Central Mechanical Engineering Research Institute (CMERI), Durgapur
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| Title |
Simultaneous reduction, exfoliation, and nitrogen doping of graphene oxide via a hydrothermal reaction for energy storage electrode materials
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| Creator |
Zhang, Hang
Kuila, Tapas Kim, Nam Hoon Yu, Dong Sheng Lee, Joong Hee |
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| Subject |
Materials
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| Description |
Nitrogen (N)-doped graphene (NG) sheets were prepared using (NH4)2CO3 and an aqueous dispersion of graphene oxide (GO) by an eco-friendly hydrothermal reaction. The in situ produced ammonia played an important role in the simultaneous nitrogen doping, the reduction and exfoliation of GO. The (NH4)2CO3/GO mass ratio and reaction temperature were varied to investigate the effects on the N doping level. The elemental analysis determined from the X-ray photoelectron spectroscopy showed that the nitrogen content of the NG was about 10.1 at.% and the oxygen content decreased significantly due to the hydrothermal reduction of GO. The electrochemical performances of the NG sheets increased with increasing doped N content. The highest specific capacitance of 295 F g-1 at a current density of 5 A g-1 and the highest specific surface area of 412 m2 g-1 were observed with the sample processed at 130 oC. The retention of the specific capacitance was maintained at 89.8% after 5000 charge–discharge cycles. These results imply that NG sheets obtained by this simple eco-friendly approach are suitable for use in high performance energy storage electrode materials.
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| Publisher |
Elsevier
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| Date |
2014
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| Type |
Article
PeerReviewed |
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| Identifier |
Zhang, Hang and Kuila, Tapas and Kim, Nam Hoon and Yu, Dong Sheng and Lee, Joong Hee (2014) Simultaneous reduction, exfoliation, and nitrogen doping of graphene oxide via a hydrothermal reaction for energy storage electrode materials. Carbon, 69. pp. 66-78. ISSN 0008-6223
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| Relation |
http://cmeri.csircentral.net/53/
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