Carbons‐to‐SiO x Contact Ratio for Faster Graphite/SiO x Electrode Formulation Optimization

The optimization of composite electrodes based on a silicon/graphite mixture is essential for battery performance, but is complex due to the multiplicity of parameters that come into play. In this direction, we propose to adjust the amount of surface area developed by all the graphitic carbons, incl...

Full description

Saved in:
Bibliographic Details
Published in:Batteries & supercaps 2024-07, Vol.7 (7)
Main Authors: Meyssonnier, Clément, Chalard, Cassandre, Goubard‐Bretesché, Nicolas, Merabet, Amina, Dupré, Nicolas, Paireau, Cyril, Lestriez, Bernard
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The optimization of composite electrodes based on a silicon/graphite mixture is essential for battery performance, but is complex due to the multiplicity of parameters that come into play. In this direction, we propose to adjust the amount of surface area developed by all the graphitic carbons, including the conductive additive to that of the silicon phase. This concept, introduced here as graphite and carbon‐to‐silicon contact ratio, is based on the importance of contacts on the mechanical, electrical and electrochemical properties of composite electrodes. The validity of this new formulation parameter is studied here for SiO x /Graphite composite electrodes, which differ in the proportions of two types of graphite (spherical or platelet form) and for different types of conductive additives (carbon black and carbon nanotubes). An optimal contact ratio is determined, allowing at the same time the best gravimetric and volumetric capacities, the best cyclability, and the best power performance.
ISSN:2566-6223
2566-6223
DOI:10.1002/batt.202400119