1. Institute of Inorganic Chemistry; University of Kiel; Max-Eyth-Strasse 2 24118 Kiel Germany
2. Institute for Applied Materials - Energy Storage Systems; Karlsruhe Institute of Technology, P.O. Box 3640; 76021 Karlsruhe Germany
3. Institute for Materials Science; University of Kiel; Kaiserstrasse 2 24143 Kiel Germany
4. Helmholtz-Zentrum Berlin; Helmholtz-Zentrum Berlin für Materialien und Energie; Hahn-Meitner-Platz 1 14109 Berlin Germany
5. ANKA Synchrotron Radiation Facility; Karlsruhe Institute of Technology, P.O. Box 3640; 76021 Karlsruhe Germany