Two-dimensional MoS ₂ -graphene hybrid nanosheets for high gravimetric and volumetric lithium storage

Two-dimensional (2D) MoS ₂ -graphene (MoS ₂ -G) hybrid is fabricated simultaneously and scalablely with an efficient electrochemical exfoliation approach from the combined bulk MoS ₂ -graphite wafer. The as-prepared 2D MoS ₂ -G hybrid is tightly covered with each other with lateral sizes of 600 nm to few micrometers and can be directly assembled to flexible films for lithium storage. When used as anode material for lithium ion battery, the resultant MoS ₂ -G hybrid film exhibits both high gravimetric (750 mA h g ⁻¹ at 50 mA g ⁻¹ ) and volumetric capacities (1200 mA h cm ⁻³ at 0.1 mA cm ⁻² ). Such excellent electrochemical performance should attributed to the unique 2D structure and good conductive graphene network, which not only facilitates the diffusion of lithium ions, but also improves the fast transfer of electrons, satisfying the kinetics requirements for rapid lithium storage.