Journal
CARBON
Volume 129, Issue -, Pages 621-630Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2017.12.073
Keywords
Nitrogen-doped carbon; Graphene oxide; Iron oxide; Nanoparticles; Cycle stability
Funding
- Korean Ministry of Education [NRF-2015R1D1A3A01018611]
- Ministry of Trade, Industry & Energy (MOTIE, Korea) [N0002310]
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Nitrogen-doped carbon-coated and graphene oxide-wrapped Fe3O4 nanoparticles were prepared using the electrostatic force between polyethyleneimine-functionalized Fe3O4 nanoparticles and graphene oxide layers, followed by annealing in an N-2 atmosphere (Fe3O4@NCG). The electrochemical performance of Fe3O4@NCG was superior to that of graphene oxide-or reduced graphene oxide-wrapped Fe3O4 nanoparticles and carbon-coated Fe3O4 nanoparticles. Fe3O4@NCG exhibited stable specific capacity of similar to 895 mAh g(-1) after 350 cycles over the voltage range 0.001-3.0 V vs. Li/Li+. The superior performance of Fe3O4@NCG was attributed to the presence of a nitrogen-doped carbon layer and networks of reduced graphene oxide. The chemical route-derived Fe3O4@NCG may be a promising anode material for high-performance lithium-ion batteries. (C) 2017 Elsevier Ltd. All rights reserved.
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