Journal Article

FZJ-2021-05332

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lithium intercalation into graphite: In operando analysis of Raman signal widths

Jovanovic, S. (Corresponding author)FZJ*RWTH* ; Jakes, P.FZJ* ; Merz, S.FZJ* ; Eichel, R.-A.FZJ*RWTH* ; Granwehr, J.FZJ*RWTH*

2022
Wiley-VCH Verlag GmbH & Co KGaA Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/31704  doi:10.1002/elsa.202100068

Abstract: 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.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 1223 - Batteries in Application (POF4-122) (POF4-122)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2022

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Database coverage:
; ; ; DOAJ Seal ; Ebsco Academic Search ; NCBI Molecular Biology Database

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