1. Laboratory for Gas Sensors, IMTEK – Department of Microsystems Engineering University of Freiburg Georges-Koehler-Allee 102 Freiburg 79110 Germany
2. Institute for Materials Science Kiel University Kaiserstr. 2 Kiel 24143 Germany
3. Institute for Applied Materials – Energy Storage Systems – IAM-ESS Karlsruhe Institute of Technology—KIT Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen 76344 Germany
4. Institute of Inorganic Chemistry Kiel University Max-Eyth-Str. 2 Kiel 24118 Germany
5. Fraunhofer Institute for Physical Measurement Techniques IPM Heidenhofstr. 8 Freiburg 79110 Germany