Dresden 2014 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 14: Functional Materials III - Li ion batteries

MM 14.3: Vortrag

Montag, 31. März 2014, 16:15–16:30, IFW A

All solid-state batteries using lithium iron phosphate and tin as electrodes — •Susann Nowak¹, Frank Berkemeier², and Guido Schmitz¹ — ¹Institut für Materialwissenschaften, Heisenbergstr. 3, 70569 Stuttgart — ²Institut für Materialphysik, Wilhelm-Klemm-Str. 10, 48149 Münster

Thin-film all solid-state batteries have been prepared using lithium iron phosphate (LFP) as the cathode, lithium phosphoroxide oxynitride (LiPON) as a solid-state electrolyte, and tin as an anode. All layer preparations are carried out using ion beam sputtering which yields a battery of below 1 μm thickness on oxidized silicon. These all solid-state battery is characterized by means of electrochemical properties using chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS). Additionally the micro structure of the cells is investigated by transmission electron microscopy (TEM) and electron diffraction. It is found that in comparison to a system in liquid electrolyte (lithium perchlorate in EC/DEC) the all solid-state system gives very similar results and therefor presents an interesting and suitable model system for further studies of the behavior of lithium ion batteries, for example the investigation of the behavior at higher temperatures than possible in case of a liquid electrolyte.