1. Physics of Energy Conversion and Storage, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching bei München, Germany
2. Central European Institute of Technology, Brno University of Technology, Purkynova 123, 61200 Brno, Czech Republic
3. Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice, Nam.Cs.Legii 565, 53002 Pardubice, Czech Republic