HRTEM and EELS Studies on the Structural and Chemical Modification of MoS₂ and Graphite During In-situ Reactions with Li and Na

Abstract

This is an Accepted Manuscript for the Microscopy and Microanalysis 2020 Proceedings. This version may be subject to change during the production process.

Characterizing Li in partially lithiated layer materials using atomic‐resolution imaging, modeling, and simulation

“…Details of the experimental conditions for in-situ lithiation reactions inside the TEM have been reported elsewhere. 38,41,42 The simulated results are used to identify the localized intercalated phases and the nanoscale Li concentration in the experimental images.…”

“…The in‐situ, solid‐state reaction of Li and graphite was carried out inside the TEM using a so‐called TEM‐STM holder from Nanofactory which allows the application of external electrical biasing 38,41,42 . A low‐electron dose (10.569 e – /px/s) was employed to minimize the electron radiation effects to the lithiated specimen.…”

“…HRTEM images from the postlithiated graphite are acquired using an environmental TEM (ETEM: a Cs‐corrected FEI Titan), equipped with a low‐electron‐dose camera having a large field‐of‐view (Ametek/Gatan K3‐IS). Details of the experimental conditions for in‐situ lithiation reactions inside the TEM have been reported elsewhere 38,41,42 . The simulated results are used to identify the localized intercalated phases and the nanoscale Li concentration in the experimental images.…”

“…The in-situ, solid-state reaction of Li and graphite was carried out inside the TEM using a so-called TEM-STM holder from Nanofactory which allows the application of external electrical biasing. 38,41,42 A low-electron dose (10.569 e -/px/s) was employed to minimize the electron radiation effects to the lithiated specimen. Similarly, the in-situ lithiation reaction of the MoS 2 was also carried out inside TEM using the Nanofactory TEM-STM holder with the application of external electrical biasing.…”

TEM Studies of Nanoscale Phase Transformation during in-situ reaction of Li with 2D Materials (MoS2, WS2, Graphite)

“…In the present study, in-situ solid-state reactions between Li and the 2D materials MoS2, WS2 and Graphite have been carried out inside a Tecnai F30 (S)TEM using a Nanofactory TEM-STM holder with the application of external bias (Ghosh, et al, 2020). Post-lithiation analysis of the intercalated materials have been performed in an image-aberration-corrected Titan ETEM using a camera sensitive to a low electron dose and having a large field of view (Gatan/Ametek K3-IS).…”