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DF: Fachverband Dielektrische Festkörper
DF 17: Focus Session: Alternative energies – Compensation of long- and short-term fluctuations (jointly with DY)
DF 17.4: Vortrag
Donnerstag, 29. März 2012, 16:30–16:50, EB 107
The dielectric AC and DC characterisation of composite capacitors for energy storage — •Sebastian Lemm1, Wolfram Münchgesang1, Martin Diestelhorst1, Mandy Zenkner2, Thomas Großmann2, Alexandra Buchsteiner3, Horst Beige1, Stefan G. Ebbinghaus2, and Hartmut S. Leipner3 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany — 2Institut für Chemie, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany — 3Interdisziplinäres Zentrum für Materialwissenschaften , Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany
Today, rechargeable batteries are mostly used for energy storage. An alternative to the electrochemical storage process in batteries are capacitors with a high energy density and a long carrier storage time. For the design and development of such capacitors the default dielectric AC characterisation method for capacitors is inadequate because the energy storage process operates under DC conditions. We present a measurement procedure which includes DC and AC characterisation using the example of composite capacitors consisting of barium titanate nanoparticles embedded in a matrix material. Furthermore we show the differences between the measurement methods and the problems of analysing such capacitors.