Probing Electrochemical Potential Differences over the Solid/Liquid Interface in Li-Ion Battery Model Systems
Ida Källquist, Fredrik Lindgren, Ming‐Tao Lee, Andrey Shavorskiy, Kristina Edström, Håkan Rensmo, Leif Nyholm, Julia Maibach, Maria Hahlin
Abstract
over the solid/liquid interfaces operando by measuring the kinetic energy (KE) shifts of the electrolyte core levels. The KE shift versus applied voltage shows a linear dependence of ∼1 eV/V during charging of the electrical double layer and during solid electrolyte interphase formation. This agrees with the expected results for an ideally polarizable interface. During lithiation, the slope changes drastically. We propose a model to explain this based on charge transfer over the solid/liquid interface.
Topics & Concepts
Materials scienceElectrochemistryBattery (electricity)Interface (matter)IonNanotechnologyElectrodeThermodynamicsPhysical chemistryComposite materialPower (physics)Organic chemistryCapillary numberChemistryCapillary actionPhysicsAdvancements in Battery MaterialsAdvanced Battery Technologies ResearchAdvanced Battery Materials and Technologies