Nanoarchitectured Co3O4/reduced graphene oxide as anode material for lithium-ion batteries with enhanced cycling stability
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In this paper, we report on the synthesis of a nanoarchitectured Co3O4/reduced graphene oxide (Co3O4/rGO) composite by a one-pot method. The results of X-ray diffraction and HRTEM demonstrate that the pristine Co3O4 and Co3O4/rGO powder composites consist of a nanostructured powder with high crystallinity and the nanoarchitectured Co3O4 was completely coated by the rGO. As an anode for lithium-ion batteries, the nanocomposite exhibits improved electrochemical properties, with an initial capacity of 1298 mAh g−1 at a rate of 0.1 C, and excellent cyclability up to 200 cycles at a rate of 1 C compared with the pristine Co3O4. These results can be attributed to the higher specific surface area, lower interface transfer resistance, and fast reaction kinetics of the composite electrode.
KeywordsCobalt oxides Reduced graphene oxide Hydrothermal synthesis Lithium-ion batteries Nanoarchitectured
This work was financially supported by the National Natural Science Foundation of China (nos. U1361119, 61503124), the Key Scientific Research Project for Higher Education of Henan Province (no. 16A150009), the Natural Science Foundation of Henan Province (General Program) (nos. 162300410119, 162300410115), and the Innovative Research Team (in Science and Technology) in the University of Henan Province (no. 16IRTSTHN005).
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