Rational Design of 1-D Co3O4 Nanofibers@Low content Graphene Composite Anode for High Performance Li-Ion Batteries

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Cobalt oxide that has high energy density, is the next-generation candidate as the anode material for LIBs. However, the practical use of Co3O4 as anode material has been hindered by limitations, especially, low electrical conductivity and pulverization from large volume change upon cycling. These features lead to hindrance to its electrochemical properties for lithium-ion batteries. To improve electrochemical properties, we synthesized one-dimensional (1-D) Co3O4 nanofibers (NFs) overed with reduced graphene oxide (rGO) sheets by electrostatic self-assembly (Co3O4 NFs@ rGO). The flexible graphene oxide sheets not only prevent volume changes of active materials upon cycling as a clamping layer but also provide efficient electrical pathways by three-dimensional (3-D) network architecture. When applied as an anode for LIBs, the Co3O4 NFs@ rGO exhibits superior electrochemical performance: (i) high reversible capacity (615 mAh g(-1) and 92% capacity retention after 400 cycles at 4.0 A g(-1)) and (ii) excellent rate capability. Herein, we highlighted that the enhanced conversion reaction of the Co3O4 NFs@rGO is attributed to effective combination of 1-D nanostructure and low content of rGO (similar to 3.5wt%) in hybrid composite.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2017-03
Language
English
Article Type
Article
Keywords

CARBON NANOFIBERS; LITHIUM STORAGE; ENERGY-STORAGE; NANOPARTICLES; OXIDE; CAPACITY; NANOSTRUCTURES; NANOCRYSTALS; NANOTUBES; ROUTE

Citation

SCIENTIFIC REPORTS, v.7

ISSN
2045-2322
DOI
10.1038/srep45105
URI
http://hdl.handle.net/10203/223436
Appears in Collection
MS-Journal Papers(저널논문)
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