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MM: Fachverband Metall- und Materialphysik

MM 61: Functional materials IV: Batteries III

MM 61.2: Vortrag

Donnerstag, 10. März 2016, 16:00–16:15, H52

Characterization of an all solid-state thin-film battery — •Susann Nowak¹, Frank Berkemeier², and Guido Schmitz¹ — ¹Heisenbergstr. 3, 70569 Stuttgart — ²Corrensstraße 46, 48149 Münster

In this talk an all solid-state thin-film battery is shown, which has been produced by ion beam sputtering of all parts, featuring LFP as the cathode material, LiPON as the solid electrolyte and tin as the anode material. The battery is characterized by means of cyclic voltammetry (CV), chronopotentiometry (CP) and transmission electron microscopy (TEM). From these measurements the capacity and its dependence on the cycle number is determined. Measurements at different scan rates (CV) and comparison of the peak currents yield kinetic information, which are compared to the parameters of the individual materials. In contrast to conventional battery cells, solid-state batteries can be operated at elevated temperatures. Experiments under variation of temperatures demonstrate that the capacity of the cell is significantly dependent on the temperature at which the cell is operated, pointing to a capacity loss due to kinetic restrains at room temperature. The obtained capacity after 100 cycles is starting at 20% of the LFP capacity (RT) and reaching 80% at 80°C. In contrast in a liquid cell the maximum capacity is already reached at room temperature.