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Ultrathin MoS 2 Nanosheets as Anode Materials for Sodium‐Ion Batteries with Superior Performance
Author(s) -
Su Dawei,
Dou Shixue,
Wang Guoxiu
Publication year - 2015
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201401205
Subject(s) - nanosheet , materials science , anode , exfoliation joint , scanning electron microscope , electrochemistry , nanotechnology , ion , sodium , chemical engineering , optoelectronics , composite material , electrode , graphene , metallurgy , chemistry , physics , quantum mechanics , engineering
Few‐layer MoS 2 nanosheets are successfully synthesized using a simple and scalable ultrasonic exfoliation technique. The thicknesses of the MoS 2 nanosheets ares about 10 nm as measured by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The unique nanosheet architecture renders the high‐rate transportation of sodium ions due to the short diffusion paths provided by ultrathin thickness and the large interlayer space within the MoS 2 crystal structure ( d (002) = 6.38 Å). When applied as anode materials in sodium‐ion batteries, MoS 2 nanosheets exhibit a high, reversible sodium storage capacity and excellent cyclability. The MoS 2 nanosheets also demonstrate good electrochemical performance at high current densities.