Journal Article

FZJ-2024-03534

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In‐Vitro Electrochemical Prelithiation: A Key Performance‐Boosting Strategy for Carbon Nanotube‐Containing Silicon‐Based Negative Electrodes in Li‐Ion Batteries

Ünal, L.FZJ* ; Maccio-Figgemeier, V.FZJ* ; Gebresilassie Eshetu, G. ; Figgemeier, E. (Corresponding author)FZJ*

2024
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/celc.202400146  doi:10.34734/FZJ-2024-03534

Abstract: Prelithiation technology has emerged as an enabling approach towards the practical deployment of Silicon negative electrode-based Li-Ion batteries, leading to significant advancement in initial Coulombic efficiency (ICE), energy density and cycle life. In this study, an electrochemical prelithiation has been applied to Multi-Walled Carbon Nanotubes (MWCNTs)-containing Silicon-rich Silicon/Graphite-based negative electrode, eliminating almost ~51.03 % of its first irreversible capacity losses. In contrast, a benchmarking negative electrode utilizing Carbon black (Super P) as conductive additive is found to demonstrate a reduction of ~39.55 % after prelithiation, which is considerably lower compared to MWCNTs-based electrode system. Post-mortem analysis using Energy-dispersive X-ray (EDX) analysis with a Scanning Electron Microscope (SEM) and Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR) shows disparities between pristine-cycled and prelithiated-cycled negative electrodes. Overall, prelithiation enabled MWCNTs can be regarded as an essential additive component in Silicon-based negative electrode systems for high-energy density Li-Ion batteries.

Note: The authors acknowledge the Federal Ministry of Education and Research of Germany (BMBF) for funding this work through the projects, PräLi (03XP0238X) and ProMIZ (13XP0397B). Open-Access funding enabled and organized by Projekt DEAL.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)

Appears in the scientific report 2024

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