Comparative study of kapok-based self supported composites with TiO 2 or SiO 2 usable in Li-ion batteries - Mines Paris Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Comparative study of kapok-based self supported composites with TiO 2 or SiO 2 usable in Li-ion batteries

Résumé

Biobased and recycled materials are becoming more commonly used to create anodes for lithiumion batteries. [1], [2], [3] Carbon-based materials can be obtained by pyrolyzing organic materials while keeping their initial shape. [4] In this work, we synthesized self-supported carbon-metal oxide composites using pyrolyzed kapok fibers. We chose two well known anode materials: TiO 2 processing through insertion and SiO 2 processing through conversion-alloying process. The main idea is to compare the efficiency and durability of self-supported anodes upon electrochemical mechanisms. The TiO 2-based composite was synthesized by sol-gel. In order to reach the theoretical capacity of TiO 2 the physico-chemical properties of the composite were optimized. The lithium-ion-conducting anatase phase was obtained by modifying the acid used as a sol-gel catalyst and the pyrolysis temperature. The specific surface area and the material texture were varied by testing two drying processes (evaporative and CO 2 supercritical drying) and different thermal treatments. Finally, the optimal synthesis method was determined by galvanostatic cycling of the anodes.

Domaines

Chimie
Fichier principal
Vignette du fichier
Julia-Wagner Hal.pdf (103.33 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04320414 , version 1 (04-12-2023)

Identifiants

  • HAL Id : hal-04320414 , version 1

Citer

Julia Wagner, K. Guérin, Sandrine Berthon-Fabry. Comparative study of kapok-based self supported composites with TiO 2 or SiO 2 usable in Li-ion batteries. ISICXXI: 21st International Symposium on Intercalation Compounds, Jun 2023, Nancy, France. ⟨hal-04320414⟩
14 Consultations
5 Téléchargements

Partager

Gmail Facebook X LinkedIn More