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Development of graphene-based composite materials for electrochemical storage applications

Abstract : The expectations around graphene come from huge potentialities for various applications (RF transistor, (bio)sensors…). Graphene high specific surface, mechanical resistance and conductivity make it specifically attractive for electrochemical storage applications. It has been shown that graphene sheets could be assembled to form structured graphene frameworks to translate the properties of individual sheets to functional materials and allow practical applications. The key features of these frameworks in terms of electrochemical storage applications are their graphitization level, their structural or textural disorder, and their porosity. On another hand, graphene has been interfaced with molecules to tune its electrical/optical properties or to make it more processable. The goal of the PhD project is to develop such structured graphene matrices following different methods such as the functionalization with bi-functional pilar molecules or the aerogel formation techniques. These assemblies will then be modified with different molecules to favor the formation of a stable SEI (solid electrolyte interface) and the intercalation of ions. The immobilization of redox compounds will also be attempted in order to bring a pseudo capacitive component to the system and target pseudo-capacitor applications. This thesis work will include material synthesis, assembling and functionalization steps combined to an important characterization tasks (IR, XRD, XPS, MEB, TEM, BET, electrochemistry...) The added-value of such work is that it represents an approach going from the basic material develop to the proof of concept.
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Harish Banda. Development of graphene-based composite materials for electrochemical storage applications. Material chemistry. Université Grenoble Alpes, 2018. English. ⟨NNT : 2018GREAV023⟩. ⟨tel-02003297⟩

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