Mitigating Electrode Material Degradation through Advanced Surface Modification Techniques (24/03/25)
Speaker and Affliation:
Prof. Malachi Noked
Department of Chemistry and the Bar-Ilan Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Israel
When?
24th March, 2025 (Monday), 04.45 PM (India Standard Time)
Where
KPA Auditorium, Dept. of Materials Engineering, IISc, Bangalore
Abstract:
Powering the vast majority of today’s portable devices, batteries have propelled electronics into a transformative era of mobile energy, profoundly impacting our daily lives. Yet, the relentless quest for energy storage devices with enhanced performance poses a formidable challenge to the scientific community. This drive pushes researchers to explore novel chemistries and morphologies of electrode materials (EM), aiming to surpass current technology. The goal is to engineer electrochemical storage devices with superior energy density, enhanced power performance, and markedly prolonged stability..
Understanding fundamental degradation mechanisms of EMs, and their mitigation strategies, are challenged by constraints of the liquid electrolyte environment and the complexity of electrode/electrolyte interphase formation, namely the solid electrolyte interphase (SEI) layer which forms, grows, and changes (on the electrode interface) with battery usage. Accordingly, the research community is increasingly seeking new pathways to understand and control battery degradation, including new diagnostic and characterization methods as well as mitigation strategies (e.g., electrode surface treatments, electrolyte additives and artificial SEI layers).
In my talk I will demonstrate how surface modification of EMs, significantly suppress the degradation of the battery components (e.g. electrodes, and electrolyte) and facilitates long-term stability of the electrochemical device. I will demonstrate how in our lab, we modify the surface of the EMs by either thin protection layer applied on its interface (using atomic/molecular layer deposition- M/ALD), or by surface reduction of high voltage cathode materials. I will farther show how we monitor In-Operando the degradation of the electrode\electrolyte interface using online electrochemical mass spectroscopy (OEMS), and will demonstrate the efficacy of our coating strategy in suppressing the degradation pathway of the EMs.
Speaker Bio :
Prof. Malachi Noked is a researcher in energy storage materials. As a Fulbright Ilan-Ramon fellow, he conducted post-doctoral research at the University of Maryland. Returning to Bar-Ilan in 2016, he established a research group of >25 researchers focused on energy storage and ALD surface modifications. He leads the US-Israel Energy Storage consortium and serves as the director of the Batteries Research Lab at the Israeli National Energy Centre at Bar-Ilan University. Prof. Noked has received numerous prestigious awards for energy research, including the Krill Prize of the Wolf Foundation (2019), the Climate Solutions Prize Award (2022), the Guy Sella Research Prize in Energy (2023), and the ICS Young Researcher Award (2024).