3D Nanostructured Molybdenum Diselenide/Graphene Foam as Anodes for Long-Cycle Life Lithium-ion Batteries.

A self-assembled MoSe 2 nanolayers/reduced graphene oxide (MoSe 2 /rGO) foam was prepared using a hydrothermal method. The samples were systematically investigated by X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and high-resolution transmission electron microscopy. Electrochemical performances were evaluated in two-electrode cells versus metallic lithium. It is demonstrated that the obtained MoSe 2 /rGO nanocomposites show three-dimensional architecture and excellent electrochemical performance as anode materials for Li-ion batteries. The specific capacity of MoSe 2 /rGO anode can reach up to 650 mAh g −1 at a current rate of 0.1C in the voltage range 0.01–3.0 V (vs. Li/Li + ), which is higher than the theoretical capacity of MoSe 2 (422 mAh g −1 ). Additionally, the fabricated half cells have shown good rate capability and long cycling stability with 10.9% capacity loss after 600 cycles under a current density of 0.5C. The excellent performance of the synthesized MoSe 2 /rGO is attributed to its unique nanostructure, including nanolayered MoSe 2 , highly conductive rGO networks and mechanically stable 3D architecture. [ABSTRACT FROM AUTHOR]