Emerging Capacitive Materials for On-Chip Electronics Energy Storage Technologies

Pascal Roussel is CNRS Research Director at “Unité de Catalyse et Chimie du Solide”. After a PhD in Crystallography at the CRISMAT Lab (France, Caen University) and a postdoctoral position at the “Institut fur Kristallographie der RWTH Aaachen” in Germany, he was hired in 2000 at the “Laboratoire de Cristallochimie et Physicochimie du Solide” as a research officer. He defended his habilitation in 2008 and was promoted as research director in 2014. He specializes in the study of solid structure/properties relations using diffraction techniques (X-rays, neutrons, and electrons), with a focus on thin films since 2010. He then started a fruitful collaboration with Pr Christophe Lethien from IEMN on solid-state Li-ion micro-batteries and micro-supercapacitors. Together, they developed methodologies to unravel the charge storage mechanisms in such microdevices, using advanced characterization techniques. He is the author of 350 peer-reviewed papers, three licensed patents, four book chapters, and one book. He has presented more than 300 communications (189 international + 120 national) and 26 invited talks. He has been a member of the French Crystallography Association since 2006 (vice-president from 2010 to 2014) and of the French Chemical Society since 2008 (solid-state chemistry division, treasurer of the regional section). From 2014 to 2022, he was the head of the Solid-State-Chemistry Department of UCCS (100 members), and since 2023, he is the deputy director of the UCCS laboratory (~300 people).

Christophe Lethien is a Full Professor at Polytech Lille (within the School of Engineering of Lille University) and a researcher at the Institute of Electronics, Microelectronics and Nanotechnologies (IEMN). He received his Ph.D. in 2004 in the field of optoelectronics and started to work on electrochemical devices in 2008, when he was hired at IEMN as an Associate Professor. Since 2008, his research activities have been dedicated to solid-state Li-ion micro-batteries, metal/insulator/metal microcapacitors, and micro-supercapacitors based on thin film electrodes, and since 2018, his work has focused on gaining a fundamental understanding of the electrode/electrolyte interface using in situ and operando techniques applied on thin film electrodes. He has served as the Institut Universitaire de France (IUF) Chair in Innovation since 2021, and in 2022 was awarded the Grand-Prix de l'électronique du Général Ferrié by the SEE (Electricity and Electronic Society). He is the author of 77 peer-reviewed papers, 7 patents, 10 book chapters, and 1 book. He has presented more than 175 national and international lectures, including 13 invited lectures and 2 keynotes. He has been a member of the French network on electrochemical energy storage (RS2E) since 2012 and participates in the National Batteries Program launched in January 2023 for the National Strategy of Acceleration on Batteries. From 2020 to 2023, he was the Deputy Director of IEMN laboratory, gathering 450 members.