1. Fraunhofer IAF Fraunhofer Institute for Applied Solid State Physics Tullastraße 72 79108 Freiburg Germany
2. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Albert-Einstein-Str. 15 12489 Berlin Germany
3. Chemistry Research Laboratory Department of Chemistry University of Oxford Mansfield Rd Oxford OX1 3TA United Kingdom
4. Humboldt-Universität zu Berlin Department of Chemistry Brook-Taylor-Str. 2 12489 Berlin Germany
5. IOLITEC Ionic liquids Technologies GmbH Salzstrasse 184 74076 Heilbronn Germany