1. Institute of Energy and Climate Research – Materials Synthesis and Processing (IEK‐1) Forschungszentrum Jülich GmbH Wilhelm Johnen Straße 52425 Jülich Germany
2. Institute for Materials Ruhr‐Universität Bochum 44780 Bochum Germany
3. Jülich Aachen Research Alliance JARA‐ENERGY 52425 Jülich Germany