Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 22: Poster session I

MM 22.2: Poster

Montag, 20. März 2017, 19:00–20:00, P4

Electrochemical studies on single particles of active electrode materials for lithium-ion batteries (LIBs) — •Markus Sebastian Friedrich¹, Simon Burkhardt¹, Limei Chen¹, Matthias Thomas Elm^1,2, and Peter Jens Klar¹ — ¹Heinrich-Buff-Ring 16, 35392 Giessen — ²Heinrich-Buff-Ring 17, 35392 Giessen

Lithium intercalating and deintercalating materials such as Li (Ni_xCo_yMn_1−x−y)O₂ (NCM) have been widely investigated. These materials are of interest for lithium-ion batteries due to their high theoretical capacity and high reversibility of the intercalation/deintercalation processes. Most of the studies were carried out on composite electrodes, which not only contain the pure NCM material, but also organic binder and conductive agents. These influence the electrochemical properties of the electrode significantly. To examine the influence of the active electrode material’s structure on energy storage and energy conversion of a cell system, a deeper understanding of the intrinsic properties of single (active) particles is needed. Besides widely used microelectrode setups, we developed a technique to contact individual particles in an electrochemical cell and perform measurements like CVs and EIS techniques, to characterize the pristine NCM particles with focus on conductive properties. To prepare our samples we used photolithography for structuring a photoresist on an F_xSnO₂ (FTO) coated glass substrate, to form holes of well defined size to trap single particles of NCM.