Regensburg 2016 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 36: Functional materials II: Batteries II

MM 36.5: Vortrag

Mittwoch, 9. März 2016, 12:45–13:00, H53

Local Structure, Transport and Phase Transformation in Lithium Manganese Dioxide — •Carsten Nowak, Jonas Arlt, Torben Erichsen, Johannes Maier, Björn Pfeiffer, and Cynthia A. Volkert — Georg-August-Universität Göttingen, Institute for Materials Physics, Göttingen, Germany

Local structure, ionic and electronic transport, and phase transformations are crucial for the interconversion of electrical and chemical energy in Lithium Manganese Oxide (LMO). Although the material is widely used for electrochemical energy storage, transport and conversion mechanisms at the atomic scale are not fully understood.

Here, we present experimental results on the local characterization of structure, transport and phase transformations in LMO using transmission electron microscopy (TEM) and atom probe tomography (APT). Combining different analytical techniques and in-situ experiments, the Lithium content of LMO is changed and the response of the material is characterized on nanometer length scales. Results are discussed in view of electrochemical energy storage.