A nickel oxide nanoflakes/reduced graphene oxide composite and its high-performance lithium-storage properties
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Since conventional graphite-based anode possesses a low capacity, seeking for high-capacity anode candidates becomes significant for constructing emerging Li-ion batteries. Herein, we present a composite anode prepared using a hydrothermal method, which consists of dense NiO nanoflakes in situ growing on reduced graphene oxide (rGO) sheets. The rGO sheets within the NiO/rGO composite provide a conductive frame that enables rapid charge transfer, while the in situ anchoring of NiO nanoflakes on rGO reduces the agglomeration. We found that the appropriate loading of NiO in the composite is also significant. The NiO/rGO composite anode exhibits a high capacity of 1068 mAh g−1 after 100 cycles at 0.1 A g−1. In addition, the capacity remains 870 mAh g−1 when the current density is increased to a high rate of 2 A g−1, indicating a good rate performance for potential applications.
KeywordsLi-ion battery Anode Composite Electrochemical energy storage
This work was supported by the Science and Technology Major Project of Anhui Province (18030901093 and 16030801118), the Major Project of the Anhui Provincial Department of Education (KJ2018ZD034, KJ2016SD14, and KJ2017ZD40), Foundation of Anhui Laboratory of Molecule-Based Materials (FZJ19014), Anhui Provincial Program for Innovation and Entrepreneurship of Returnees From Overseas (2019LCX005), the National Natural Science Foundation of China (51672176, 661573334 and 61873003), and the Creative Science Foundation of AHNU (2018XJJ108).
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