1. Helmholtz Institute Ulm (HIU) Electrochemical Energy Storage Helmholtzstraße 11 D‐89081 Ulm Germany
2. Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences No. 189 Songling Road Laoshan District Qingdao Shandong 266101 China
3. Institute of Engineering Thermodynamics Department of Electrochemical Energy Technology German Aerospace Center (DLR) Pfaffenwaldring 38−40 70569 Stuttgart Germany
4. Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) P.O. Box 3640 D‐76021 Karlsruhe Germany