Three‐Dimensional Molybdenum Disulfide Nanoflowers Decorated on Graphene Nanosheets for High‐Performance Lithium‐Ion Batteries

Abstract

Abstract A simple hydrothermal route was designed to prepare 3D flower‐like MoS 2 /graphene composites (FL‐MoS 2 /graphene). Herein, two products, denoted C‐FL‐MoS 2 /graphene and N‐FL‐MoS 2 /graphene, were produced by facile glucose‐ and glucosamine‐mediated methods, respectively. Both composites were found to show a well‐defined morphology with a unique structure, in which the dispersed MoS 2 nanoflowers are tightly anchored onto the graphene nanosheets. Moreover, the nanoflowers are constructed by a lot of wrinkled MoS 2 thin nanosheets, which generates numerous open voids. In the process, glucose or glucosamine as the binder plays a similar role in regulating the growth of flower‐like MoS 2 on graphene. In terms of electrochemical performance, the FL‐MoS 2 /graphene composite demonstrates superior lithium‐storage capabilities, including a high reversible capacity, excellent cycle stability, and good rate capability, than N‐MoS 2 /graphene (without the addition of any binder). Specifically, C‐FL‐MoS 2 /graphene shows a high reversible capacity of 980 mA h g −1 at a current of 100 mA g −1 even after 100 cycles, and a significantly improved high rate capability of 740 mA h g −1 is also retained at a current density of 1000 mA g −1 . The remarkable performance of FL‐MoS 2 /graphene was determined to result mainly from the unique architecture comprising 3D flower‐like MoS 2 particles and graphene nanosheets with superior conductivity.