Regensburg 2019 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 20: Poster session II

MM 20.18: Poster

Dienstag, 2. April 2019, 18:30–20:00, Poster C

Tailoring the Microstructure and Electrochemical Behavior of Li-Mn-O Thin Film Battery Electrodes — •Henry Müller, Yug Joshi, Efi Hadjixenophontos, Claudia Peter, and Guido Schmitz — Institute of Materials Science, Chair for Materials Physics, University of Stuttgart, Heisenbergstraße 3, 70569 Stuttgart, Germany

Lithium manganese oxides have received great attention for application in lithium ion battery cathodes. In this complex ternary system, several compositions can be used to reversibly intercalate lithium. They crystallize in various structures ranging from different cubic across orthorhombic to monoclinic crystal systems. We use sputter deposition to manufacture high-capacity thin film electrodes with different compositions. In electrodes with a higher oxygen content the largest fraction of the material has a monoclinic crystal structure. Electrodes containing less oxygen crystallize mostly in rock salt and spinel structure. This can be used to tune the electrochemical behavior and capacity of the material by controlling the oxygen partial pressure during deposition.