Potentials in Li-Ion Batteries Probed by Operando Ambient Pressure Photoelectron Spectroscopy.

ABSTRACT: The important electrochemical processes in a battery happen at the solid/liquid interfaces. Operando ambient pressure photoelectron spectroscopy (APPES) is one tool to study these processes with chemical specificity. However, accessing this crucial interface and identifying the interface signal are not trivial. Therefore, we present a measurement setup, together with a suggested model, exemplifying how APPES can be used to probe potential differences over the electrode/electrolyte interface, even without direct access to the interface. Both the change in electron electrochemical potential over the solid/liquid interface, and the change in Li chemical potential of the working electrode (WE) surface at Li-ion equilibrium can be probed. Using a Li₄Ti₅O₁₂ compo

SUBMITTER: Kallquist I 

PROVIDER: S-EPMC8832392 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature