Arrêt de service programmé du vendredi 10 juin 16h jusqu’au lundi 13 juin 9h. Pour en savoir plus
Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Unveiling the stability of Sn/Si/graphite composites for Li-ion storage by physical, electrochemical and computational tools

Abstract : Complex materials composed of two and three elements with high Li-ion storage capacity are investigated and tested as lithium-ion battery (LiB) negative electrodes. Namely, anodes containing tin, silicon, and graphite show very good performance because of the large gravimetric and volumetric capacity of silicon and structural support provided by tin and graphite. The performance of the composites during the first cycles was studied using ex situ magic angle spinning (MAS) Li-7 Nuclear Magnetic Resonance (NMR), density functional theory (DFT) calculations, and electrochemical techniques. The best performance was obtained for Sn/Si/graphite in a 1 : 1 : 1 proportion, due to an emergent effect of the interaction between Sn and Si. The results suggest a stabilization effect of Sn over Si, providing a physical constraint that prevents Si pulverization. This mechanism ensures good cyclability over more than one hundred cycles, low capacity fading and high specific capacity.
Type de document :
Article dans une revue
Domaine :
Liste complète des métadonnées

https://hal-u-picardie.archives-ouvertes.fr/hal-03613022
Contributeur : Louise Dessaivre Connectez-vous pour contacter le contributeur
Soumis le : vendredi 18 mars 2022 - 10:51:47
Dernière modification le : vendredi 1 avril 2022 - 03:58:02

Identifiants

Collections

Citation

Andrés Ruderman, Sacha Smrekar, M. Victoria Bracamonte, Emiliano Primo, Guillermina Luque, et al.. Unveiling the stability of Sn/Si/graphite composites for Li-ion storage by physical, electrochemical and computational tools. Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2021, 23 (5), pp.3281-3289. ⟨10.1039/d0cp05501h⟩. ⟨hal-03613022⟩

Partager

Métriques

Consultations de la notice

10