The Mechanistic Insights into the 2H‐1T Phase Transition of MoS2 upon Alkali Metal Intercalation: From the Study of Dynamic Sodiation Processes of MoS2 Nanosheets

• DOI: 10.1002/admi.201700171
• Publication Date: 2017-05-18T06:42:35Z
• Authors: Qianming Huang; Xiaomin Li; Muhua Sun; Lei Zhang; Chenzhi Song; Liang Zhu; Pan Chen; Zhi Xu; Wenlong Wang; Xuedong Bai
• Keywords: Superstructure

Phase transition in 2D MoS 2 is an important issue metal dichalcogenides. The mechanism of the phase investigated extensively, while a comprehensive understanding remains to be elusive. 2H 1T can induced by intercalation with alkali metals, associated transformation its electronic and structural orders. Here, using situ transmission electron microscopy, electrochemical sodiation processes nanosheets are investigated. This paper points out intermediate 2H‐Na 0.25 × √3 superstructure. occurs from 0.5 1T‐Na , where ratio Mo 3+ 4+ 1:1 intervalence charge transfer (IVCT) between two ions should not neglected. Based on this viewpoint it proposed that IVCT plays role formation transition. findings provide new perspective transition, help better understand other