Residual Li2O degrades PVdF during the preparation of NMC811 slurries for Li-ion batteries

Angelica Laurita; Liang Zhu; Pierre-Etienne Cabelguen; Jérémie Auvergniot; Dominique Guyomard; Philippe Moreau; Nicolas Dupré

doi:10.1039/D3CC00471F

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Residual Li₂O degrades PVdF during the preparation of NMC811 slurries for Li-ion batteries†

Angelica Laurita,*^a Liang Zhu,^b Pierre-Etienne Cabelguen,^b Jérémie Auvergniot,^b Dominique Guyomard,^a Philippe Moreau

^a and Nicolas Dupré

*^a

Author affiliations

* Corresponding authors

^a Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
E-mail: nicolas.dupre@cnrs-imn.fr

^b Umicore, 31 rue du marais, Brussels BE-1000, Belgium

Abstract

⁷Li MAS NMR quantification of lithiated species at the surface of aged NMC811 industrial powders and slurries shows that the electrode preparation process exacerbates Li extraction. A combination of ⁷Li MAS NMR and XPS suggest a new reaction for the PVdF binder degradation, involving in fact Li₂O as the reagent and the formation of LiF.

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Article information

DOI: https://doi.org/10.1039/D3CC00471F
Article type: Communication
Submitted: 01 Feb 2023
Accepted: 29 Mar 2023
First published: 31 Mar 2023

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Chem. Commun., 2023,59, 4951-4953

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Residual Li₂O degrades PVdF during the preparation of NMC811 slurries for Li-ion batteries

A. Laurita, L. Zhu, P. Cabelguen, J. Auvergniot, D. Guyomard, P. Moreau and N. Dupré, Chem. Commun., 2023, 59, 4951 DOI: 10.1039/D3CC00471F

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