MoS2/Graphene Nanosheets from Commercial Bulky MoS2 and Graphite as Anode Materials for High Rate Sodium‐Ion Batteries |
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| Authors: | Dan Sun Delai Ye Ping Liu Yougen Tang Jun Guo Lianzhou Wang Haiyan Wang |
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| Institution: | 1. College of Chemistry and Chemical Engineering, Central South University, Changsha, P. R. China;2. Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, Australia;3. School of Chemistry and Materials Science, Guizhou Normal University, Guiyang, P. R. China |
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| Abstract: | Tuning heterointerfaces between hybrid phases is a very promising strategy for designing advanced energy storage materials. Herein, a low‐cost, high‐yield, and scalable two‐step approach is reported to prepare a new type of hybrid material containing MoS2/graphene nanosheets prepared from ball‐milling and exfoliation of commercial bulky MoS2 and graphite. When tested as an anode material for a sodium‐ion battery, the as‐prepared MoS2/graphene nanosheets exhibit remarkably high rate capability (284 mA h g?1 at 20 A g?1 (≈30C) and 201 mA h g?1 at 50 A g?1 (≈75C)) and excellent cycling stability (capacity retention of 95% after 250 cycles at 0.3 A g?1). Detailed experimental measurements and density functional theory calculation reveal that the functional groups in 2D MoS2/graphene heterostructures can be well tuned. The impressive rate capacity of the as‐prepared MoS2/graphene hybrids should be attributed to the heterostructures with a low degree of defects and residual oxygen containing groups in graphene, which subsequently improve the electronic conductivity of graphene and decrease the Na+ diffusion barrier at the MoS2/graphene interfaces in comparison with the acid treated one. |
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| Keywords: | ball‐milling exfoliation defects MoS2/Graphene rate performance sodium ion batteries |
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