Utilisation d'anions à fonction sulfate dans des électrolytes pour batterie au lithium. Etude des mécanismes de transport

Abstract : Lithium salts based on oligoether sulfate were synthesized and characterised. They incorporate oxyethylene units wich enable the lithium cation salvation and, potentially, their use as ionic liquids. Their properties as lithium salts dissolved in liquid or polymer electrolytes were evaluated. Their electrochemical and thermal stabilities are sufficient for lithium battery application. Due to their weak dissociation in POE, their conductivities are fairly low. On the other hand, they have high cationic transference numbers. In mixture with usual salts as LiTFSI, they provide a good compromise between conductivities/transference number/cost. The second part of this study deals with the synthesis and characterisation of an ionomer with sulfat function and polyether backbone. The electrochemical, physical and chemical properties of this material show that it could be used as polymer electrolyte. Its potential as cross-linked gelled polymer electrolyte is outstanding. Structural analyses on an ionomeric monocrystal have been corroborated with quantum chemistry calculations.
Document type :
Theses
Material chemistry. Institut National Polytechnique de Grenoble - INPG, 2005. French


https://tel.archives-ouvertes.fr/tel-00009490
Contributor : Christophe Chauvin <>
Submitted on : Tuesday, June 14, 2005 - 2:57:24 PM
Last modification on : Tuesday, June 14, 2005 - 2:57:24 PM

Identifiers

  • HAL Id : tel-00009490, version 1

Citation

Christophe Chauvin. Utilisation d'anions à fonction sulfate dans des électrolytes pour batterie au lithium. Etude des mécanismes de transport. Material chemistry. Institut National Polytechnique de Grenoble - INPG, 2005. French. <tel-00009490>

Export

Share

Metrics

Consultation de
la notice

174

Téléchargement du document

249