Dresden 2020 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 37: Materials for Energy Storage and Conversion - Structure of Battery Materials

MM 37.2: Talk

Wednesday, March 18, 2020, 12:00–12:15, IFW D

Creating an NCM thin film cathode model system for the interface analysis of liquid electrolyte batteries — •Hendrik Hemmelmann^1,2, Julius K. Dinter^1,2, Juri E. Becker^1,2, Angelika Polity², and Matthias T. Elm^1,2 — ¹Center for Materials Research, Justus-Liebig-University Giessen, Germany — ²I. Physikalisches Institut, Justus-Liebig-University Giessen, Germany

Coating the active cathode material (CAM) with a chemically inactive layer can significantly improve the performance of lithium ion batteries (LIBs). However, the reason for the beneficial effect of the coating is lacking a deeper understanding. Here, we present the preparation of lithium nickel cobalt manganese layered oxide (NCM) thin films, which were subsequently coated with Al2O3 of different thicknesses using atomic layer deposition (ALD). Such thin films are ideal model systems to characterize the interface properties using surface-sensitive techniques. To investigate the influence of the coating, electrochemical measurements were performed using metallic Li as anode and the interface properties were characterized using XRD, SEM, AFM, Raman and XPS.