Synthesis of hierarchical free-standing NiMoO4/reduced graphene oxide membrane for high-performance lithium storage
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Free-standing and flexible NiMoO4 nanorods/reduced graphene oxide (rGO) membrane with a 3D hierarchical structure was successfully synthesized by a general approach including vacuum filtration followed by thermal reduction. NiMoO4 nanorods with about 50–100 nm diameter were embedded homogenously into the 3D rGO sheets and assembled with rGO to form a membrane about 10 μm in thickness. The NiMoO4/rGO membrane could be directly evaluated as anode materials for lithium-ion batteries (LIBs) without using binder. The 3D layer stacked graphene hierarchical architecture can not only offers a continuous conducting framework for efficient diffusion and transport of ion/electron but also accommodates the large volume expansion of NiMoO4 nanorod changes during cycling. Moreover, our results show that the NiMoO4/rGO membrane exhibited excellent electrochemical performance with a high reversible capacity of 945 mAh g−1 at a current density of 0.25 A g−1 as anode materials in LIBs.
KeywordsNickel molybdate Reduced graphene oxide Membrane Anode Lithium-ion batteries
This work was supported by the National Natural Science Foundation of China (no. 51672213), the Key Project of Research and Development of Shaanxi Province (no. 2017ZDCXL-GY-08-01), the Key Science and Technology Innovation Team Project of Natural Science Foundation of Shaanxi Province (no. 2017KCT-01), and the Natural Science Foundation of Shaanxi Province (no. 2017JM2025).
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