Berlin 2012 – wissenschaftliches Programm
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MI: Fachverband Mikrosonden
MI 2: TEM- and SEM-based material analysis
MI 2.6: Vortrag
Montag, 26. März 2012, 11:45–12:00, EMH 225
Characterization of novel capacitors for energy storage on the basis of 0-3 composites — •Jens Glenneberg1, Alexandra Buchsteiner1, Mandy Zenkner1, Thomas Großmann1, Claudia Erhardt1, Stefan G. Ebbinghaus1, Martin Diestelhorst1, Sebastian Lemm1, Wolfram Münchgesang1, Horst Beige1, Gerald Wagner1,2, and Hartmut S. Leipner1 — 1Martin-Luther-Universität Halle-Wittenberg — 2Universität Leipzig
Thin film capacitors with high energy densities represent an alternative solution for energy storage issues. Their advantages are quick charging and discharging times, combined with long lifetimes as well as high robustness associated with nearly no maintenance. The capacitors under development are realized by embedding nano-particles of different perovskites (BaTiO3, Ba(Ti,Ge)O3, CaCu3Ti4O12) into either an organic or inorganic matrix (0-3-composite). Depending on the applied matrix, the perovskite particles are coated with a specific surfactant in order to achieve a uniform distribution. The distribution as well as the size of the perovskites-particles determines the electrical properties of the capacitor dielectrics. In order to investigate the microstructure, the nano-particles and the surrounding matrix are imaged by environmental scanning electron microscopy (ESEM) in both secondary electron contrast (SE) and backscattered electron contrast (BSE) as well as by transmission electron microscopy (TEM). To acquire compositional information, additional energy-dispersive X-ray spectroscopy (EDS) has been carried out.