Keynote Speaker
Biography
Patrice Simon is Distinguished Professor of Material Science at the Université Toulouse III - Paul Sabatier and member of the French Academy of Sciences (2019) and French Academy of Technology (2018).
He is former director of the Alistore European Research Institute (www.alistore.eu) dedicated to Li-ion battery research and Deputy Director of the French network on Electrochemical Energy Storage (RS2E, www.energie-rs2e.com).
His research activities focus on the fundamental understanding of electrochemical processes occurring at the material / electrolyte interfaces in electrodes for electrochemical energy storage devices (batteries and electrochemical capacitors). He published about 250 papers (h-index 86, 70,000 citations).
He received several awards for his scientific contribution including Grants from the European Research Council (2012, 2020), Conway Prize in Electrochemistry from ISE (2018), the Silver Medal from the CNRS (2015), International RussNanoprize (2015). He is Fellow of the International Society of Electrochemistry (2017), RSC Horizon Prize (2021).
Patrice Simon is member of the European Academy of Sciences (2019), and Institut Universitaire de France (2017).
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Electrochemistry at the Nanoscale: Tracking Ion Fluxes in Electrodes for Energy Storage Applications
Patrice SIMON
Keywords: CVD, SEI, Ni-rich cathode, PEDOT, NCM cathode
Abstract
This presentation will give an overview of the research work achieved on capacitive (porous carbon) and high-rate redox (pseudocapacitive) materials, and will show the challenges/limitations associated with the development of these materials. Starting with porous carbons [1,2], we will present the state-of-the art of the fundamentals of ion adsorption mechanism in confined pores of porous carbon electrodes and its practical applications. Moving from double layer to high-rate redox materials, we will show how the control of the material and electrode structures can help in preparing high power battery electrodes using 2-Dimensional MXene materials [3-5]. This set of results suggests that understanding of electrosorption under confinement in porous and layered materials, that results in improved electrochemical performance, could be explained by the electrolyte ion partial desolvation observed when confined in nanopores (porous carbons) or in interlayer spacing (2D materials) [6]. Understanding confined electrochemical systems and coupling between chemical, electrochemical, and transport processes in confinement may open tremendous opportunities for energy applications in the future.
In a last part, we will introduce a new in-plane electrochemical impedance spectroscopy technique that allows to deconvolute the ionic and electronic contributions of the total impedance in the plane of the electrode, at different potentials. This novel set-up comes as a new tool to further evaluate and improve the performance of electrode materials for energy storage devices by bringing new insights regarding the electronic and ionic transport mechanisms in energy storage electrodes during operation.
References
[1] H. Shao. et al., Chemical Society Reviews, (2020), 49, 3005-3039
[2] P. Simon and Y. Gogotsi, Nature Materials (2020), 19, 1151-11633
[3] I. Wu et al., Angew. Chem. (2021), 133, 2–8; B. Anasori et al., Nature Reviews Materials, (2017), 2, 17.
[4] X. Wang, et al., Nature Energy (2019), 4, 241–248
[5] Y. Li et al., Nature Materials (2020), 19, 894–899
[6] S. Fleischmann et al., Nature Energy 2022.