Berlin 2012 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 26: Joint focus session: Alternative Energies: Compensation of long- and short-term fluctuations (with DF)

DY 26.4: Talk

Thursday, March 29, 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.