1. Empa Swiss Federal Laboratories for Materials Science and Technology 8600 Dübendorf Switzerland
2. Battery Science Branch Energy Science Division Sensors and Electron Devices Directorate U.S. Army Research Laboratory Adelphi MD 20783 USA
3. ETH Zurich Department of Materials 8093 Zurich Switzerland
4. Helmholtz‐Institute Münster IEK‐12 Forschungszentrum Jülich GmbH 48149 Münster Germany