Invited Paper CA+NS+SS+VT-ThA6
Operando Spectroscopy and Microscopy of the Electrode-Electrolyte Interface in Batteries

Thursday, October 24, 2019, 4:00 pm, Room A120-121

Real-time tracking structural/chemical changes of electrodes in batteries is crucial to understanding how they function and why they fail. However, in real battery systems electrochemical/chemical reaction occurs at varying length scales, leading to changes not only in the bulk but often locally at electrolyte/electrode interface. In situ X-ray techniques are typically employed for studying structural changes in the bulk electrodes and often limited by their poor spatial resolution in probing local changes at interface. Herein, we present our recent results from developing new operando spectroscopy and microscopy techniques, specialized for studying electrochemical/chemical reaction and structural modification of the solid-electrode surface and interface, in the presence of the electrolyte and during battery operation. Examples will be given to show how interfacial reaction during battery operation is visualized directly, allowing gaining insights into electrode/electrolyte design for practical use in batteries. New opportunities for combining first principles simulation and deep machine learning to complement and guide experiments will also be discussed.