Origin of the Phase Transition in Lithiated Molybdenum Disulfide
Origin of the Phase Transition in Lithiated Molybdenum Disulfide
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DOI：
10.1021/nn505668c
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发表时间：
2014-11-01
期刊：
影响因子：
17.1
通讯作者：
Schwingenschlogl, Udo
中科院分区：
文献类型：
--
作者：
Cheng, Yingchun;Nie, Anmin;Schwingenschlogl, Udo
二维 MoS2 中的相变和相工程对于电子和储能应用非常重要。通过原位透射电子显微镜，我们发现H-MoS2在锂化的早期阶段转变为T-LiMoS2，随后形成Mo和Li2S相。从 H-MoS2 到 T-LiMoS2 的转变可以用导带最小值处的电子掺杂和电子声子耦合来解释。两者对于开发基于MoS2的二维半导体-金属接触以及将MoS2用作锂离子电池的阳极材料都是至关重要的。
Phase transitions and phase engineering in two-dimensional MoS2 are important for applications in electronics and energy storage. By in situ transmission electron microscopy, we find that H-MoS2 transforms to T-LiMoS2 at the early stages of lithiation followed by the formation of Mo and Li2S phases. The transition from H-MoS2 to T-LiMoS2 is explained in terms of electron doping and electronphonon coupling at the conduction band minima. Both are essential for the development of two-dimensional semiconductor-metal contacts based on MoS2 and the usage of MoS2 as anode material in Li ion batteries.