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Article Dans Une Revue Batteries & Supercaps Année : 2024

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

Résumé

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.

Domaines

Matériaux
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Année Mois Jours
Avant la publication
mardi 15 octobre 2024
Fichier sous embargo
mardi 15 octobre 2024
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Dates et versions

hal-04596508 , version 1 (15-07-2024)

Identifiants

Citer

Clément Meyssonnier, Cassandre Chalard, Nicolas Goubard-Bretesché, Amina Merabet, Nicolas Dupré, et al.. Carbons‐to‐SiO x Contact Ratio for Faster Graphite/SiOx Electrode Formulation Optimization. Batteries & Supercaps, 2024, ⟨10.1002/batt.202400119⟩. ⟨hal-04596508⟩
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