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MM: Fachverband Metall- und Materialphysik

MM 20: Poster session II

MM 20.28: Poster

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

Tayloring morphology and carbon functionalization of LiFe_xMn_1−xPO₄ — •Lennart Singer¹, Rouven Zeus¹, Enzo Moretti¹, Elisa Thauer¹, Peter Klar², Simon Burkhardt², Limei Chen², Michael Binnefeld³, and Rüdiger Klingeler¹ — ¹Kirchhoff Institute of Physics, Heidelberg University — ²I.Institute of Physics, Justus-Liebig-University Gießen — ³Institute of Pharmacy and Molecular Biotechnology, Heidelberg University

We report on the systematic variation of morphology, agglomeration and carbon functionalization in LiFe_xMn_1−xPO₄ with various doping levels x and its effect on the electrochemical performance of the materials. A top-down approach applying a combination of solid-state synthesis and different post-treatment procedures such as ball milling, thermal treatment, and optical floating-zone purification is utilized to obtain pure materials with different primary particles size. Various mechanical and chemical approached to obtain appropriate carbon coating of the active material have been used. In addition, we also report a bottom-up microwave-assisted hydrothermal synthesis route where key parameters such as precursor concentration, additives, and pH-value of the reactant were varied to obtain materials of different size and agglomeration state.