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Accueil du site > Offres d’emploi > Stages > [Master 2] Novel materials for Li-ion battery anodes

[Master 2] Novel materials for Li-ion battery anodes

par Guillaume Mériguet - 23 octobre

Période de stage : Février 2020-juin 2020

Encadrement : C. Rizzi, L. Gaillon, Alexandros Ploumistos (équipe ELI)

Project

Over the last 30 years, Li-ion batteries have gradually dominated the rechargeable battery market. Despite the numerous enhancements in each iteration of the technology, there is still plenty of room for improvement. Our ambitious project aims to increase the capacity and longevity of Li-ion batteries all the while bettering their mechanical properties and making them safer. To that end, we intend to use novel materials and restructure existing ones, bringing different chemistries and processes together.Starting with graphene-based scaffolds, several different types of composites and hybrids will be elaborated, combining metals, semimetals and ionic liquids into nano-and 3D-structured materials[1–3]. The interplay of the anode material and the electrolyte will also be investigated and tuned to each particular system[4,5].The student will be acquainted with the state of the art and they will use that knowledge in order to safely follow established protocols and to help set up new ones. This is a truly bottom-up approach to building a battery and it entails organic and inorganic syntheses, low-and high-temperature processing, shaping techniques, working in a controlled atmosphere and finally assembling the batteries themselves. During the course of their work, the student will have the opportunity to employ an array of different characterization techniques in order to investigate the nano-and micro-structure of the materials, to analyze the precursors, synthesized products and by-products, as well as assess their physicochemical properties.

Specific techniques or methods

Organic/inorganic synthesis, pyrochemistry, mechanochemistry, X-Ray Diffraction, Scanning/Transmission Electron Microscopy, Nuclear Magnetic Resonance spectroscopy, Vibrational spectroscopy, Thermal analyses (TGA/DTG, DSC), Cyclic Voltammetry, Electrochemical Impedance Spectroscopy

References

[1] Georgakilas, V. ; Otyepka, M. ; Bourlinos, A. B. ; Chandra, V. ; Kim, N. ; Kemp, K. C. ; Hobza, P. ; Zboril, R. ; Kim, K. S. Functionalization of Graphene : Covalent and Non-Covalent Approaches, Derivatives and Applications. Chemical Reviews 2012, 112 (11), 6156–6214.
[2] Liu, T. ; Zhang, L. ; Cheng, B. ; Yu, J. Hollow Carbon Spheres and Their Hybrid Nanomaterials in Electrochemical Energy Storage. Advanced Energy Materials 2019, 1803900[
[3] Yeh, C.-N. ; Huang, H. ; Lim, A. T. O. ; Jhang, R.-H. ; Chen, C.-H. ; Huang, J. Binder-Free Graphene Oxide Doughs. Nature Communications 2019, 10 (1).
[4] Etacheri, V. ; Haik, O. ; Goffer, Y. ; Roberts, G. A. ; Stefan, I. C. ; Fasching, R. ; Aurbach, D. Effect of Fluoroethylene Carbonate (FEC) on the Performance and Surface Chemistry of Si-Nanowire Li-Ion Battery Anodes.Langmuir 2012, 28 (1), 965–976.
[5] Jiang, X. ; Luo, L. ; Zhong, F. ; Feng, X. ; Chen, W. ; Ai, X. ; Yang, H. ; Cao, Y. Electrolytes for Dual-Carbon Batteries. ChemElectroChem 2019.