Preparation of MoS₂-coated three-dimensional graphene networks for high-performance anode material in lithium-ion batteries

A novel composite, MoS₂-coated three-dimensional graphene network (3DGN), referred to as MoS₂/3DGN, is synthesized by a facile CVD method. The 3DGN, composed of interconnected graphene sheets, not only serves as template for the deposition of MoS₂, but also provides good electrical contact between the current collector and deposited MoS₂. As a proof of concept, the MoS₂/3DGN composite, used as an anode material for lithium-ion batteries, shows excellent electrochemical performance, which exhibits reversible capacities of 877 and 665 mAh g^-1 during the 50^th cycle at current densities of 100 and 500 mA g^-1, respectively, indicating its good cycling performance. Furthermore, the MoS₂/3DGN composite also shows excellent high-current-density performance, e.g., depicts a 10^th-cycle capacity of 466 mAh g ^-1 at a high current density of 4 A g^-1. A high-performance anode material for lithium-ion batteries is prepared based on the MoS₂-coated three-dimensional graphene network (3DGN), which is prepared via a facile CVD method for deposition of MoS₂ on the surface of 3DGN. This novel material might be also useful in other clean energy applications, such as electrocatalytic hydrogen production.