13. Symposium Energieinnovation, 12.-14.2.2014, Graz/Austria Seite 1 von 10 CONSIDERATIONS FOR AN INNOVATIVE HIGH TEMPERATURE BATTERY IN POWER PLANT APPLICATIONS Cornelius M. Berger 1* , Joachim Geske 2 , Peter Orzessek 1 , Oleg Tokariev 1 , Qingping Fang 3 , Norbert H. Menzler 1 ; Martin Bram 1 , Hans P. Buchkremer 1 1 Institut für Energie und Klimaforschung IEK-1, Forschungszentrum Jülich GmbH Wilhelm Johnen Straße, 52428 Jülich, www.fz-juelich.de 2 Institut für Energie und Klimaforschung IEK-STE, Forschungszentrum Jülich GmbH Wilhelm Johnen Straße, 52428 Jülich, www.fz-juelich.de 3 Institut für Energie und Klimaforschung IEK-3, Forschungszentrum Jülich GmbH Wilhelm Johnen Straße, 52428 Jülich, www.fz-juelich.de * Corresponding author, Tel. +49 2461 61-9705, c.berger@fz-juelich.de Abstract: A novel high temperature battery based on the concept of the solid oxide fuel cell (SOFC) is presented. Due to the use of cheap iron- and calcium-based storage materials providing a high theoretical capacity of roughly 1300 Wh/kg the battery could be used to optimize the part load properties and the long term durability of conventional power plants. The elevated working temperature of 800 °C makes it applicable where high quality heat is available and needed. In this paper an economical consideration leads to general design recommendations for this battery which operates in test mode with current densities of 150 mA/cm 2 and approximately one hour charging/discharging time at cell voltages between 0.7-1.2 V. Keywords: Rechargeable Oxide Battery, Tape Casting, Calcium ferrites, Fuel Cells 1 Introduction Any technology for storing electrical energy provides the opportunity of decoupling generation and usage of electricity. This can be beneficial whenever there is a temporal change of electricity generation cost due to load variation or fluctuating availability. Latter becomes especially true, when augmenting the grid with power sources (renewables) with a possibly large discrepancy between actual and rated power input. In this case, energy storage can substitute the increase of rated power or even render additional flexible power plants unnecessary. Since conventional storage technologies (e.g. pumped hydro) lack the possibility of expansion, electrochemical storage can be an alternative. However, due to high investment cost this option has not been implemented on significant scale so far. Therefore technological alternatives with low investment cost are needed. A very innovative concept that fulfills these requirements is the Rechargeable Oxide Battery (ROB) which will be presented in this paper.