ISM, Salle des conférences, Bâtiment A12

Thursday 4th December 10:00

In-situ analysis of Ti3C2Tx MXenes for electrochemical actuation

Mathieu Etienne

DR CNRS, Nancy

https://www.lcpme.ul.cnrs.fr/laboratoire/elan/

MXenes, a class of two-dimensional transition metal carbides and nitrides, have demonstrated exceptional electrochemical properties, such as high conductivity, flexibility, and ion intercalation behavior. This study aims to optimize the MXene based actuators, particularly focusing on understanding the in-situ dynamics during ion intercalation and electrochemical strain generation. The electrochemical actuation behavior of Ti₃C₂Tx (T = -O, -OH, -F) MXene was investigated using various in-situ techniques such as Raman spectroscopy, AFM, SECM and EQCM. Assembly and testing of a final actuator device was performed, focusing on the need for getting a braille display. A sandwich-type structure, comprising functionalized MXene electrodes and a LiCl-based gel electrolyte, was fabricated and evaluated for strain and force generation.

Electrochemical aspects of a lithium ion-battery

Hubert Girault

Professor EPFL, Lausanne

https://people.epfl.ch/hubert.girault?lang=fr

The rapid development of the lithium ion battery industry has been mainly driven by material science, novel manufacturing processes, not to forget very efficient battery management systems. Here, we shall take a step backward and discuss the electrochemical aspects from a more fundamental viewpoint with an emphasis on the Nernst equation.