1. Institute for Energy and Climate Research, Materials Synthesis and Processing (IEK-1), Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52428 Jülich, Germany
2. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Materials Science and Technology (ER-C-2), Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52428 Jülich, Germany
3. Central Facility for Electron Microscopy (GFE), RWTH Aachen University, Ahornstraße 55, 52074 Aachen, Germany
4. Institute of Mineral Engineering, RWTH Aachen University, Forckenbeckstraße 33, 52074 Aachen, Germany