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Theses

Fonctionnalisation de Nanotubes pour la fabrication de batteries Lithium/Soufre et Lithium/Organique

Abstract : Lithium/organic batteries are receiving a lot of attention for energy storage. The interest of these batteries lies in their organic electrode materials, prepared from abundant, inexpensive and easily recyclable precursors. However, organic materials have two major disadvantages: their dissolution in organic electrolytes and their low electronic conductivity.The work carried out during this thesis aims at developing organic active materials for the positive electrodes of lithium batteries. In order to overcome the problematics of active material dissolution and poor electronic conductivity, the strategy is to graft covalently the electroactive molecules onto carbon nanotubes, via the chemical reduction of diazonium salts.The first part of this thesis is devoted to the grafting of anthraquinone active material onto different carbon electrodes, and their chemical and electrochemical characterizations. A detailed study of the chemical grafting procedure is carried out to better understand the grafting process and its limitations.In the second part of this thesis, other electroactive molecules (phenanthrenequinone, naphthoquinone, benzoquinone and a molecule containing disulfide bonds) are synthesized and grafted onto nanotubes. The results show that the rate of grafting onto nanotubes is low regardless of the nature of the grafted electroactive molecule.
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https://tel.archives-ouvertes.fr/tel-03224872
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Submitted on : Wednesday, May 12, 2021 - 8:23:09 AM
Last modification on : Tuesday, January 4, 2022 - 6:08:52 AM
Long-term archiving on: : Friday, August 13, 2021 - 6:14:09 PM

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  • HAL Id : tel-03224872, version 1

Citation

Hanine Kamaleddine. Fonctionnalisation de Nanotubes pour la fabrication de batteries Lithium/Soufre et Lithium/Organique. Chimie organique. Université Paris-Saclay, 2021. Français. ⟨NNT : 2021UPASF008⟩. ⟨tel-03224872⟩

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