Regensburg 2019 – scientific programme

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DS: Fachverband Dünne Schichten

DS 24: Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...) Part I

DS 24.6: Talk

Thursday, April 4, 2019, 16:15–16:30, H39

Deposition of thin films of lithium nickel cobalt manganese oxide (NCM) cathode materials by using the sol-gel spin coating approach — •Hendrik Hemmelmann¹ and Matthias T. Elm^1,2,3 — ¹Center for Materials Research, Justus-Liebig-University Gießen, Germany, Heinrich-Buff-Ring 16, 35392 Gießen — ²1. Physical Institute, Justus-Liebig-University Gießen, Germany, Heinrich-Buff-Ring 16, 35392 Gießen — ³Physical Chemical Institute, Justus-Liebig-University Gießen, Germany, Heinrich-Buff-Ring 17, 35392 Gießen

Thin films are ideal model systems to study the interface properties of a materials system. To investigate the interfaces properties of the electrolyte-electrode interface of Lithium-ion batteries lithium nickel cobalt manganese oxide (NCM) layered cathode thin films were prepared using a sol-gel approach followed by a spin coating process. By varying the spin coating process parameters homogenous films with a smooth surface were obtained. The as prepared films were structurally and electrochemically characterized using GIXRD, high resolution electron microscopy (HREM), energy dispersive X-ray spectroscopy (EDX) and cyclic voltammetry (CV). Furthermore, atomic layer deposition (ALD) was used to deposit Al2O3 and CeO2 coatings of a few nanometres on the cathode materials to study the effect of a protective coating on the structural stability and electrochemical performance of the cathode material.