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Graphene‐Assisted Exfoliation of Molybdenum Disulfide to Fabricate 2D Heterostructure for Enhancing Lithium Storage
Author(s) -
Wang Tailin,
Zhao Gang,
Sun Changlong,
Zhang Lei,
Wu Yongzhong,
Hao Xiaopeng,
Shao Yongliang
Publication year - 2017
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201601187
Subject(s) - materials science , graphene , molybdenum disulfide , lithium (medication) , anode , exfoliation joint , electrochemistry , sulfide , heterojunction , nanotechnology , composite number , intercalation (chemistry) , molybdenum , electrode , chemical engineering , inorganic chemistry , optoelectronics , composite material , metallurgy , chemistry , medicine , endocrinology , engineering
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/MoS 2 is a heterostructure and contains CS bonds after treatment with a novel layered graphene oxide‐assisted ultrasonic method. The existence of CS bond benefits the transport of lithium ion and electrons and enhances the electrochemical properties of G/MoS 2 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.