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MM: Fachverband Metall- und Materialphysik

MM 22: Poster session I

MM 22.7: Poster

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

Synthesis and functionalization of Li₂MnSiO₄ and LiFe_0.1Mn_0.9PO₄ for Li-ion batteries — •Kevin Häuser¹, Christoph Neef¹, Hans-Peter Mayer², and Rüdiger Klingeler¹ — ¹Kirchhoff-Institut für Physik, Universität Heidelberg, D-69120 Heidelberg, Germany — ²Institut für Geowissenschaften, Universität Heidelberg, D-69120 Heidelberg, Germany

Two classes of materials are studied with respect to their applicability and optimisation for usage in Li-ion batteries. For hydrothermally synthesized LiFe_0.1Mn_0.9PO₄, the effect of the primary particle size and of hierarchical structuring of the nanosized active materials into micrometer-sized agglomerates by usage of organic additives and post-synthesis treatment is investigated. In contrast, Li₂MnSiO₄ was synthesized by an all-acetate precursor sol-gel process. Various carbon additives were tested to determine the optimal way of creating an embedding carbon nanomatrix to functionalize the materials. For both classes, the materials are characterised by SEM and XRD studies. The electrochemical properties are investigated by means of galvanostatic cycling and the influence of primary particle size and carbon structuring is discussed.