1. Electrochemical Energy Technology Institute of Engineering Thermodynamics German Aerospace Center (DLR) Carl-von-Ossietzky-Str. 15 26129 Oldenburg Germany
2. Institute of Building Energetics, Thermal Engineering and Energy Storage University of Stuttgart Pfaffenwaldring 31 70569 Stuttgart Germany
3. Chemical Technology 1 Institute of Chemistry Carl von Ossietzky University Oldenburg Carl-von-Ossietzky-Str. 9–11 26129 Oldenburg Germany
4. Electrochemical Energy Technology Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 70569 Stuttgart Germany