Origin of the Phase Transition in Lithiated Molybdenum Disulfide

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• 作者：Yingchun Cheng ; Anmin Nie ; Qingyun Zhang ; Li-Yong Gan ; Reza Shahbazian-Yassar ; Udo Schwingenschlogl
• 刊名：ACS Nano
• 出版年：2014
• 出版时间：November 25, 2014
• 年：2014
• 卷：8
• 期：11
• 页码：11447-11453
• 全文大小：572K
• ISSN：1936-086X

文摘

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 electron鈥損honon 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.

Keywords:

phase transition; dichalcogenide; electron鈭抪honon coupling; battery