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Liquid-exfoliated MoS_2 nanosheets/graphene composites with high capacity and excellent cycle stability for lithium-ion batteries

Liu, Hong and Liu, Lei and Yi, Min and Shen, Zhigang and Liang, Shuaishuai and Zhang, Xiaojing and Ma, Shulin (2017):
Liquid-exfoliated MoS_2 nanosheets/graphene composites with high capacity and excellent cycle stability for lithium-ion batteries.
In: Chemical Engineering Journal, pp. 293-301, 311, [Article]

Abstract

Improving the rate capability and cycle stability of two-dimensional molybdenum disulfide (MoS2) still holds the key to its application in lithium-ion batteries (LIBs). Here we reported liquid-exfoliated MoS2 nanosheets/graphene composites (MoS2/Gra) towards the high capacity and excellent cycle stability for LIBs. The composites were assembled by pristine graphene and MoS2 nanosheets, which were prepared via the sonication-assisted liquid exfoliation of pristine graphite and MoS2 powders in aqueous surfactant solutions. The composites exhibited the reversible capacity as high as 1145 mAh g−1 after 175 cycles at 100 mA g−1 and excellent rate capability by retaining ∼88% of the capacity at 2000 mA g−1. It is the first time that liquid-exfoliated MoS2/Gra composites show so excellent electrochemical performances and thus are fascinating for LIBs due to the facile, cost-effective and scalable liquid exfoliation route.

Item Type: Article
Erschienen: 2017
Creators: Liu, Hong and Liu, Lei and Yi, Min and Shen, Zhigang and Liang, Shuaishuai and Zhang, Xiaojing and Ma, Shulin
Title: Liquid-exfoliated MoS_2 nanosheets/graphene composites with high capacity and excellent cycle stability for lithium-ion batteries
Language: English
Abstract:

Improving the rate capability and cycle stability of two-dimensional molybdenum disulfide (MoS2) still holds the key to its application in lithium-ion batteries (LIBs). Here we reported liquid-exfoliated MoS2 nanosheets/graphene composites (MoS2/Gra) towards the high capacity and excellent cycle stability for LIBs. The composites were assembled by pristine graphene and MoS2 nanosheets, which were prepared via the sonication-assisted liquid exfoliation of pristine graphite and MoS2 powders in aqueous surfactant solutions. The composites exhibited the reversible capacity as high as 1145 mAh g−1 after 175 cycles at 100 mA g−1 and excellent rate capability by retaining ∼88% of the capacity at 2000 mA g−1. It is the first time that liquid-exfoliated MoS2/Gra composites show so excellent electrochemical performances and thus are fascinating for LIBs due to the facile, cost-effective and scalable liquid exfoliation route.

Journal or Publication Title: Chemical Engineering Journal
Volume: 311
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Mechanics of functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 16 Mar 2017 07:43
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