TY  - JOUR
AU  - Jovanovic, Sven
AU  - Jakes, Peter
AU  - Merz, Steffen
AU  - Eichel, Rüdiger-A.
AU  - Granwehr, Josef
TI  - Lithium intercalation into graphite: In operando analysis of Raman signal widths
JO  - Electrochemical science advances
VL  - 2
IS  - 4
SN  - 2698-5977
CY  - Weinheim
PB  - Wiley-VCH Verlag GmbH & Co KGaA
M1  - FZJ-2021-05332
SP  - e2100068
PY  - 2022
AB  - The mechanism of reversible lithium intercalation in graphite anodes is still not fully understood. In operando Raman spectroscopy provides a sensitive means to monitor structural changes during the intercalation process. Analysis of the D-band to G-band intensity ratio (D/G ratio) is a common method to study the structure of carbon materials. However, this approach is complicated for the investigation of graphite anodes during battery cycling, as the D-band disappears with the onset of lithium intercalation. To circumvent this issue, the D/G ratio can be replaced by using the G-band full-width-at-half-maximum (FWHM). In this study, an investigation of the G-band FWHM during battery cell cycling is demonstrated as an alternative to monitor the intercalation of lithium into a graphite electrode. It was observed that lithium intercalation already occurs to a small extent during solid–electrolyte interphase (SEI) formation and that the formation of staged intercalation compounds leads to a continuous deformation of the boundary graphene layer.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001136690800017
DO  - DOI:10.1002/elsa.202100068
UR  - https://juser.fz-juelich.de/record/903683
ER  -