NDLI: Hybridization of graphene nanosheets and carbon-coated hollow Fe<sub>3</sub>O<sub>4</sub> nanoparticles as a high-performance anode material for lithium-ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Yu, Feng Dai, Bin Guo, Xuhong Peng, Jun Li, Gang Ma, Yanqing Zuo, Yongtao Wang, Gang Wong, Ching-Ping
Copyright Year	2016
Abstract	Fe3O4 has long been regarded as a promising anode material for lithium ion batteries due to its high theoretical capacity, earth abundance, low cost, and nontoxic properties. At present, no effective method has been realized to overcome the bottleneck of poor cyclability and low rate capability because of its huge volume change and low electrical conductivity. In this article, a facile synthesis strategy is developed to fabricate two-dimensional (2D) carbon encapsulated hollow Fe3O4 nanoparticles (H-Fe3O4 NPs) homogeneously anchored on graphene nanosheets (designated as H-Fe3O4@C/GNSs) as a durable high-rate lithium ion battery anode material. In the constructed architecture, the thin carbon shells can avoid the direct exposure of encapsulated H-Fe3O4 NPs to the electrolyte and preserve the structural and interfacial stabilization of H-Fe3O4 NPs. Meanwhile, the flexible and conductive GNSs and carbon shells can accommodate the mechanical stress induced by the volume change of H-Fe3O4 NPs as well as inhibit the aggregation of Fe3O4 NPs and thus maintain the structural and electrical integrity of the H-Fe3O4@C/GNSs electrode during the lithiation/delithiation processes. As a result, the H-Fe3O4@C/GNSs electrode exhibits outstanding reversible capacity (870.4 mA h g−1 at a rate of 0.1C (1C = 1 A g−1) after 100 cycles) and excellent rate performance (745, 445, and 285 mA h g−1 at 1, 5, and 10C, respectively) for lithium storage. More importantly, the H-Fe3O4@C/GNSs electrode demonstrates prolonged cycling stability even at high charge/discharge rates (only 6.8% capacity loss after 200 cycles at a high rate of 10C). Our results show that the 2D H-Fe3O4@C/GNSs are promising anode materials for next generation LIBs with high energy and power density.
Starting Page	2453
Ending Page	2460
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	4
Issue Number	7
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta09742h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Anode Ion Electrical resistivity and conductivity Carbon Graphene Satellite navigation Electrolyte Electrode Lithium
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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