**Author details**

Philipp Lettenmeier<sup>1</sup> , Aldo S. Gago<sup>1</sup> \* and K. Andreas Friedrich1,2

\*Address all correspondence to: aldo.gago@dlr.de

1 Institute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring, Stuttgart, Germany

2 Institute for Energy Storage, University of Stuttgart, Keplerstraße, Stuttgart, Germany
