Li Intercalation in MoS2: In Situ Observation of Its Dynamics and Tuning Optical and Electrical Properties

Nano Letters
Feng XiongYi Cui

Abstract

Two-dimensional layered materials like MoS2 have shown promise for nanoelectronics and energy storage, both as monolayers and as bulk van der Waals crystals with tunable properties. Here we present a platform to tune the physical and chemical properties of nanoscale MoS2 by electrochemically inserting a foreign species (Li(+) ions) into their interlayer spacing. We discover substantial enhancement of light transmission (up to 90% in 4 nm thick lithiated MoS2) and electrical conductivity (more than 200×) in ultrathin (∼2-50 nm) MoS2 nanosheets after Li intercalation due to changes in band structure that reduce absorption upon intercalation and the injection of large amounts of free carriers. We also capture the first in situ optical observations of Li intercalation in MoS2 nanosheets, shedding light on the dynamics of the intercalation process and the associated spatial inhomogeneity and cycling-induced structural defects.

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Citations

Jan 20, 2016·Accounts of Chemical Research·Wei LuoLiangbing Hu
Oct 22, 2016·Nature Communications·Gaohua ZhuDavid G Cahill
Nov 4, 2016·The Journal of Physical Chemistry Letters·Xin QianRonggui Yang
May 24, 2017·Nanoscale·Juan XiaZe Xiang Shen
Jul 4, 2017·Journal of the American Chemical Society·Wei TangGuangyuan Wesley Zheng
Jul 24, 2018·Advanced Materials·Mohammad Taghi SharbatiFeng Xiong
Jul 25, 2018·Advanced Materials·Xiaolong Liu, Mark C Hersam
Mar 9, 2018·Nature·Chen WangXiangfeng Duan
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Dec 13, 2019·Nanoscale·Haojie LaiWeiguang Xie
Feb 6, 2020·ChemSusChem·Rui ZhangHaiyan Wang
May 27, 2020·Chemical Society Reviews·Maria S Sokolikova, Cecilia Mattevi
Mar 11, 2020·Advanced Science·Zhongjian XieHan Zhang
Apr 15, 2020·Nature Materials·Javier Taboada-GutiérrezPablo Alonso-González
Oct 6, 2020·Chemical Society Reviews·Yujia HuangChunlei Wan
Jan 9, 2018·Chemical Society Reviews·Alok M TripathiBing Joe Hwang
Oct 31, 2018·Nature Communications·Aditya SoodKenneth E Goodson

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