1. Institute
of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring
38-40, D-70569 Stuttgart, Germany
2. Electrochemistry
and Electroplating Group, Technische Universität Ilmenau, Gustav-Kirchhoff-Straße
6, D-98693 Ilmenau, Germany
3. Institute
for Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany
4. Institute
for Energy Storage, University of Stuttgart, Pfaffenwaldring 31, D-70569 Stuttgart, Germany