%0 Journal Article
%A Jovanovic, Sven
%A Jakes, Peter
%A Merz, Steffen
%A Eichel, Rüdiger-A.
%A Granwehr, Josef
%T Lithium intercalation into graphite: In operando analysis of Raman signal widths
%J Electrochemical science advances
%V 2
%N 4
%@ 2698-5977
%C Weinheim
%I Wiley-VCH Verlag GmbH & Co KGaA
%M FZJ-2021-05332
%P e2100068
%D 2022
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001136690800017
%R 10.1002/elsa.202100068
%U https://juser.fz-juelich.de/record/903683