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

Abstract

A simple hydrothermal route was designed to prepare 3D flower‐like MoS2/graphene composites (FL‐MoS2/graphene). Herein, two products, denoted C‐FL‐MoS2/graphene and N‐FL‐MoS2/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 MoS2 nanoflowers are tightly anchored onto the graphene nanosheets. Moreover, the nanoflowers are constructed by a lot of wrinkled MoS2 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 MoS2 on graphene. In terms of electrochemical performance, the FL‐MoS2/graphene composite demonstrates superior lithium‐storage capabilities, including a high reversible capacity, excellent cycle stability, and good rate capability, than N‐MoS2/graphene (without the addition of any binder). Specifically, C‐FL‐MoS2/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‐MoS2/graphene was determined to result mainly from the unique architecture comprising 3D flower‐like MoS2 particles and graphene nanosheets with superior conductivity.

MoS2/carbon composites prepared by ball-milling and pyrolysis for the high-rate and stable anode of lithium ion capacitors

“…3f) where MoS 2 /C and MoS 2 /CP show smaller semicircles than bulk MoS 2 in the high frequency zone resulted from low charge transfer resistance (R ct ). 39,53 It should be pointed out that MoS 2 /C shows higher capacity from above data because it has higher content of nitrogen (Table S1 †) and MoS 2 mass ratio (Fig. 1f) than those of MoS 2 /CP.…”

Molybdenum Disulfide Based Nanomaterials for Rechargeable Batteries

“…One benefit of this approach is that the aggregation of MoS 2 nanosheets can be avoided. To date, various 3D structures assembled from MoS 2 nanosheets, including nanotubes, microboxes, nanoflowers, and nanospheres have been successfully fabricated. For example, Zhang et al.…”

“…This approach can also be used to fabricate MoS 2 /carbon hybrids. A variety of such hybrids have been synthesized, including MoS 2 /graphene, CNTs@MoS 2 , carbon nanofibers (CNFs)@MoS 2 , and MoS 2 /porous carbon . For example, Li et al.…”

Growth of MoS2 Nanoflowers with Expanded Interlayer Distance onto N‐Doped Graphene for Reversible Lithium Storage

“…Another popular way is to the combining with highly conductive carbon materials ,. These conductive hosts can not only improve the electric conductivity, but also prevent the aggregation and restacking of MoS 2 nanoparticles, thereby increasing the electrochemical efficiency of the whole electrode ,. It is well known that the structural similarity and morphological compatibility between MoS 2 sheets and graphene make them a great partner in boosting the electrochemical performances of LIBs ,.…”