In situ Scanning Electron Microscopy Observation of MoS2 Nanosheets during Lithiation in Lithium Ion Batteries

• DOI: 10.1021/acsaem.0c01102
• Publication Date: 2020-06-08T17:37:37Z
• Authors: Chuan-Yu Wei; Pei-Chin Lee; Chin-Wei Tsao; Lan-Hsuan Lee; Di-Yan Wang; Cheng-Yen Wen
• Keywords: Nanosheet

Using MoS2 nanosheets or composites of for the anode materials is beneficial to energy storage performance lithium ion batteries (LIBs). In order understand stability as material in LIBs (Li–MoS2 batteries), we study structural evolution during lithiation process by means situ scanning electron microscopy (SEM) and ex microstructural analyses. By adjusting chemical vapor deposition growth parameters, monolayer atomic sheets continuous multilayer are respectively prepared experiments. SEM analysis shows that phase transformations occur at some voltages linear sweep voltammetry measurement. These reactions further validated Li–MoS2 cyclic voltammetry. Microstructural analyses nanosheet confirm morphology significantly changes initial from open circuit voltage 1.1 V. addition reversible intercalation Li+ ions, another irreversible reaction between ions also occurs process. This transformation plays an important role battery when scaled down.