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  • Title: Construction of MoO2 Quantum Dot-Graphene and MoS2 Nanoparticle-Graphene Nanoarchitectures toward Ultrahigh Lithium Storage Capability.
    Author: Wang C, Jiang J, Ruan Y, Ao X, Ostrikov K, Zhang W, Lu J, Li YY.
    Journal: ACS Appl Mater Interfaces; 2017 Aug 30; 9(34):28441-28450. PubMed ID: 28805374.
    Abstract:
    Herein, MoO2 quantum dots (QDs; <5 nm) are synthesized through a one-step solvothermal process. MoO2 QD-bonded graphene sheets (MoO2-QDs@RGO) are facilely produced and can be further converted through sulfidation into MoS2 nanoparticle-bonded graphene sheets (MoS2-NPs@RGO). The novel MoO2-QDs@RGO electrodes demonstrate exceptionally attractive lithium storage capability (e.g., 1257 mA h g-1 at 100 mA g-1, being close to the highest values ever reported for a MoO2-based lithium ion battery electrode), rate capability, and cycle stability. Moreover, the MoS2-NPs@RGO delivered a superior capacity (1497 mA h g-1 at 100 mA g-1) with outstanding rate retention and cycling stability. The superior lithium storage capabilities are ascribed to the synergetic effects of the high-surface-area graphene sheets, the well-dispersed MoS2 nanoparticles, and their strong bonding with each other, which effectively prevents aggregation of MoS2 while the composite architecture allows fast transport of electrons and ions.
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