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Relations structure-propriétés de surfaces carbonées électroactives: impact de la couche organique et du substrat

Abstract : The formation of new carbon materials modified with organic films has been a very active field of research for several decades. These materials are attracting increasing interest in the fields of energy, health and environmental. In order to improve the performance of these materials, the innovations are based in particular on the control of the functionalization of the surfaces, the control of the stability of the immobilized layer or on the new properties related to the modification. According to the chemical units grafted, the applications are numerous: detection and/or capture of chemical elements, hydrophobicity, storage of electrical energy or gas or also biocompatibility. In this context, the work of this thesis deals with the modification of carbon surfaces by various organic compounds, firstly to determine the structure-properties relationships of the deposited film and secondly to improve the performance of carbon supercapacitors. Our investigations are based on the synthesis of conjugated or unconjugated compounds, followed by indirect grafting by build steps or direct grafting via amine oxidation. These grafts were explored methodologically to determine the impact of the conjugation within the deposited organic film and the influence of the structure of carbon material. We also show that controlled activated carbon functionalization allows for better integration of molecules into carbon supercapacitors. The challenge is to understand molecule-substrate interactions during the modification of materials.
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Submitted on : Thursday, April 23, 2020 - 6:02:30 PM
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  • HAL Id : tel-02552733, version 1

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Ewen Touzé. Relations structure-propriétés de surfaces carbonées électroactives: impact de la couche organique et du substrat. Matériaux. Université d'Angers, 2018. Français. ⟨tel-02552733⟩

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