SSCU Student Seminar
Name: Ms. Rikta Salui
Title: Tracking Dynamic Electrochemical Interface with Multimodal Operando EQCM-D
Date & Time: Thursday, 15th October 2026 at 4.00 p.m.
Venue: Rajarshi Bhattacharyya Memorial Lecture Hall, Chemical Sciences Building
Abstract:
Electrochemical interfaces change continuously during operation through adsorption, ion and solvent exchange, metal deposition and dissolution, and surface layer formation. Understanding these processes requires information beyond current and potential. Electrochemical quartz crystal microbalance (EQCM) uses resonance frequency changes to follow surface loading. Its extension to dissipation monitoring (EQCM-D) provides additional information about energy loss and the interaction of surface layers with the surrounding liquid.
This seminar will briefly review the development of EQCM and EQCM-D and introduce the principles of frequency, dissipation and overtone measurements. Selected case studies will then illustrate how this knowledge, together with suitable models and complementary techniques, helps us investigate different electrochemical interfaces. The main focus will be on connecting the measured signals with the physical and chemical processes taking place at the interface.
References:
1. Yuchen Ji, et.al. From Bulk to Interface: Electrochemical Phenomena and Mechanism Studies in Batteries via Electrochemical Quartz Crystal Microbalance. Chem. Soc. Rev. 2021, 50, 10743–10763.
2. Wang, Q., et.al. In Situ Reversible Underwater Superwetting Transition by Electrochemical Atomic Alternation. Nat. Commun. 2019, 10, 1212.
3. Tom P. A. van der Pol, et.al. Cation–Polymer Interactions Drive Water Expulsion and Deswelling in n-Type Ladder Organic Mixed Conductors. Nat. Mater. 2026, 25, 832–839.
4. Schick, B. W., et.al. Influence of Chloride and Electrolyte Stability on Passivation Layer Evolution at the Negative Electrode of Mg Batteries Revealed by Operando EQCM-D. Angew. Chem. Int. Ed. 2024, 63, e202413058.