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Reference : UMR6200-CLECAB-001
Workplace : ANGERS
Date of publication : Monday, June 7, 2021
Scientific Responsible name : Clément Cabanetos
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
Affordability and accessibility of advanced nomad technologies made the electrical energy storage a major concern of modern societies. Moreover, in an era of energy transition, dictated by the depletion of fossil fuels, efficient storage technologies represent an essential and complementary prerequisite to random and intermittent carbon-free renewable power sources. In this context metal-ion batteries have been extensively developed and are now well established in the electronic industry. However, extraction, processing and end-use of such materials give rise to questions about their environmental impact and future availability. Consequently, redox active organic materials appear to be ideal substitutes due to their low-cost, abundancy, synthetic accessibility and tunability, recyclability and potential compatibility with large-area, light-weight and flexible devices. Usually combined with a metal electrode, it is noteworthy that only very few electroactive organic materials have been used for the preparation of all-organic batteries (ie, where both electrodes are composed of organic materials). Generally constituted of two different organic electrodes, optimization of such promising and emerging devices can indeed quickly become a tricky and time-consuming task.
In this context, the DREAM (Dual REdox Active Molecules for energy storage applications) project aims at using the same material at both electrodes, through the synthesis and functionalization of metal-free dual redox active molecules, thus affording symmetrical organic electrochemical energy storage (EES) devices. To differ from the current research, and as a further step toward simplification and innovation, emphasis will be put on the synthesis of single metal-free molecules that i) don't need prelithiation processes, ii) have stable and compatible dual redox properties, ie, that can be both reversibly oxidized and reduced with a large potential difference and iii) can be post-functionalized (according to the considered device architecture).
Spanning from the synthesis of new materials, based on original and unprecedented building blocks, to their evaluation in devices, the challenging and interdisciplinary DREAM project aims at contributing to the development of the next generation of cleaner and safer EES devices.
Founded in 1988, MOLTECH-Anjou (CNRS - University of Angers) integrates more than 80 people (professors, assistant-professors, researchers, engineers, administrative staffs, post-doctoral fellows and PhD students) which are organized in five research teams of chemists and physicists.
A key characteristic of MOLTECH-Anjou lies on the convergence of the research topics, which are all focused on smart molecular materials and which are supported by expertises ranging from theoretical chemistry and molecular modeling, organic and inorganic syntheses, coordination chemistry, physical and analytical chemistry, material sciences,… to photonics. These skills are implemented into fields related to the optical and electronic properties of organic materials, with a special focus for addressable materials, molecular electronics and nanostructuration.
Constraints and risks
The PhD candidate must hold a master 2 degree in Organic Chemistry and should demonstrate strong synthetic skills. Experience related to pi-conjugated materials will be an added velue to the application. English must be fluently spoken and understood.
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