Regensburg 2013 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 15: Poster Session
MM 15.32: Poster
Montag, 11. März 2013, 18:00–20:00, Poster E
V2O5 thin films for Li-ion battery applications — •Tobias Gallasch, Frank Berkemeier, and Guido Schmitz — Institut für Materialphysik, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
Ion beam sputtered V2O5 thin films (thickness 10 nm - 200 nm) are investigated electrochemically via cyclic voltammetry and chrono-potentiometric measurements. Within these measurements a capacity of about 400 mAh/g for reversible lithium storage is reached. In addition, Li+ diffusion coefficients are determined by different approaches and compared to each other.
Structural changes between as-prepared, partially charged and cycled thin films are evaluated in detail by HR-TEM and EELS and the lithium signal is evaluated, directly, depending on the state of charge.
Thus, in this work the link between Li intercalation processes and morphological changes is worked out combining modern techniques of electrochemistry and analytical TEM.