1. Institute of Electrochemistry Ulm University Albert-Einstein-Allee 47 89081 Ulm Germany
2. Helmholtz-Institute-Ulm (HIU) Electrochemical Energy Storage Helmholtzstr. 11 89081 Ulm Germany
3. Karlsruhe Institute of Technology (KIT) P.O. Box 3640 76021 Karlsruhe Germany