Layer-by-layered SnS2/graphene hybrid nanosheets via ball-milling as promising anode materials for lithium ion batteries
Layer-by-layered SnS 2 /graphene (LL-SnS 2 /G) hybrid nanosheets are fabricated via a simple ball-milling of SnS 2 nanoplates obtained through hydrothermal treatment and commercial graphene. When assessed as anode materials for LIBs , LL-SnS 2 /G shows a high initial reversible capacity of 696.27 mAh g −1 with a high initial coulombic efficiency (74.16%) at 200 mA g −1 , and negligible capacity fading over 180 cycles. Moreover, LL-SnS 2 /G also has an excellent rate capability, which delivers a high capacity of 567.78 mAh g −1 at 2000 mA g −1 . Benefits from synergism between SnS 2 nanoplates with high specific capacity and graphene, the graphene increases the conductivity of SnS 2 , buffers the volume change during lithiation/de-lithiation processes, and provides an effective physical barrier between the active materials and the electrolyte to suppress the shuttle effect of polysulfides formed during de-lithiation processes. LL-SnS 2 /G shows excellent electrochemical performance and is a promising anode material candidate for lithium ion batteries.
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