Graphene‐Assisted Exfoliation of Molybdenum Disulfide to Fabricate 2D Heterostructure for Enhancing Lithium Storage

Graphene–molybdenum sulfide composite materials are attracting considerable interest as a promising candidate of anode for lithium‐ion batteries because of their excellent electrical properties. However, few studies have been conducted on the lithium‐storage mechanism and process of dynamics of these materials. In this work, the lithium‐storage mechanism of these materials is examined by structural characterization and kinetic analysis. Structural characterization results show that the prepared G/MoS2 is a heterostructure and contains CS bonds after treatment with a novel layered graphene oxide‐assisted ultrasonic method. The existence of CS bond benefits the transport of lithium ion and electrons and enhances the electrochemical properties of G/MoS2 electrode. Kinetic analysis further reveals that the lithium‐ion diffusion effect plays a major role in charge and discharge processes. This synthesis method and analysis strategy may also apply to other composite materials for high‐performance lithium‐ion storage. 2D heterostructure of graphene–molyb‐denum sulfide is fabricated by a graphene oxide‐assisted ultrasonic method, which is concise, novel, and cost effective. Furthermore, this strategy can be applied to other fields. The results of the electrochemical experiments and kinetic analysis show that the G/MoS2 composite possesses excellent electrochemical properties, and thus can be regarded as a competitive candidate anode for lithium‐ion battery.