Journal
CARBON
Volume 57, Issue -, Pages 184-190Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2013.01.062
Keywords
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Funding
- Singapore National Research Foundation under CREATE program: EMobility in Megacities [NRF2009EWT-CERP001-026]
- A*STAR SERC [1021700144]
- Singapore MPA [23/04.15.03 RDP 009/10/102, MPA 23/04.15.03 RDP 020/10/113]
- Chinese Ministry of Education [212058]
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We report a simple approach to prepare the nitrogen-modified few-layer graphene (FLG) directly from graphite flakes. With the aid of melamine, graphite flakes can be directly ultrasonicated into FLG in acetone. The subsequent annealing process further transforms the melamine absorbed on the surface of graphene into melon (C6N9H3)(x), which is one type of condensation product of melamine, and simultaneously dopes the graphene with nitrogen. When tested as a supercapacitor electrode, the nitrogen-modified FLG shows a much higher specific capacitance (e.g., 227 F/g at 1A/g) than that of reduced graphene oxide (rGO) (e.g., 133 F/g at 1A/g). (C) 2013 Elsevier Ltd. All rights reserved.
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