1. Federal Institute for Materials Research and Testing, Richard-Willstatter-Straße 11, Berlin 12489, Germany
2. Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, Berlin 12489, Germany
3. Department for Electrochemical Energy Storage, Helmholtz-Zentrum Berlin for Materials and Energy, Hahn-Meitner Platz 1, Berlin 14109, Germany
4. Biomaterials, Hierarchical Structure of Biological and Bio-inspired Materials, Max Planck Institute of Colloids and Interfaces, Potsdam 14476, Germany
5. MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, Enschede 7500 AE, The Netherlands