Agenda

Chargement… Chargement…

 

Futur seminars

All seminars at 11h00 in Salle des Elements. In red: Colloquium. In green: Internal seminars.

DATE SPEAKER TITRE RESUME
27/02/20 Patrice Simon Electrochemistry at the nanoscale in electrodes for energy storage applications Growing demand for fast charging electrochemical energy storage devices with long cycle lifetimes for portable electronics has led to a desire for alternatives to current battery systems, which store energy via slow, diffusion-limited faradaic reactions. The closest devices that fit these demands are Electrochemical Double Layer Capacitors (EDLCs) which can be fully charged within minutes, with almost unlimited cyclability. The past years have shown important performance improvement in EDLCs performance thanks to the design of porous carbons and electrolytes with tailored properties. However, although EDLCs are now used in several applications including for the ever-growing electric mobility market (trams and hybrid electric vehicles), the main challenge for ECs lies in the improvement of their energy density and this is why pseudocapacitive materials are extensively investigated in the literature.

This presentation will give an overview of the research work we achieved on capacitive (porous carbon) and high-rate redox materials and the challenges/limitations associated with their development. Starting with porous carbons, we will present the state-of-the art of the fundamental of ion transfer and adsorption in porous carbons, and how those discoveries have shaped the field of supercapacitors. In a second part of the talk, we will present our work on high-rate redox (pseudocapacitive) materials, with a focus on MXenes. MXenes are two-dimensional (2D) early transition metal carbides and nitrides, which are usually produced by selective etching of the A group element from MAX phases. The careful control of the electrode architecture and surface composition have led to drastic improvement of the performance of these materials which now offers interesting perspectives to design high energy and high power energy storage devices.

26/03/20 Jacques Dubochet A Nobel prize, how and what for ? The unexpected discovery in 1980 that water can be vitrified – namely, immobilised by rapid cooling without being transformed by crystallisation  –  was the opening of successful electron cryo-microscopy. From that point, it took 35 years and the contribution of many groups until it became possible to observe – nearly « simply » and rapidly – macromolecular complexes at atomic resolution. In 2017, the Swedish academy decided that the achievement deserved a Nobel prize in chemistry that I shared with Richard Henderson (GB) and Joachim Frank (US). This was a severe blow to the comfortable retirement I was enjoying for 10 years. The more so since it was also the time when some people became terribly aware that our good old Earth and our civilisation were rushing in a catastrophic course. I joined the movement.
23/04/20 Maxime Vitale
07/05/20 Marie Labeye
04/06/20 Nicolas Pietrancosta
18/06/20 Christelle Mansuy Fonctionnalisation de nanoparticules inorganiques par des biomolécules pour une application en imagerie et/ou thérapie

 

Past seminars

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  • Colloquium : https://calendar.google.com/calendar/ical/51euhs92mf6ucqp1jhed6kl8sk%40group.calendar.google.com/public/basic.ics
  • Interne : https://calendar.google.com/calendar/ical/7q87ub8g9llt7trhhshets85j4%40group.calendar.google.com/public/basic.ics
  • Invité : https://calendar.google.com/calendar/ical/l7vgfm54b9p88nn6kbvboeodeg%40group.calendar.google.com/public/basic.ics
  • PSL-BIC : https://calendar.google.com/calendar/ical/pslbicseminars%40gmail.com/public/basic.ics