The resulting slurry was coated onto carbon-coated aluminum foil with a wet film thickness of 60 µm using a doctor blade and dried overnight in an oven at 80 °C. Electrodes with a diameter of 12 mm and an areal loading of ca. 1 mg/cm 2 were cut using a handheld electrode puncher and pressed in a hydraulic press with 5 tons weight for 1 minute. These electrodes were further dried under vacuum at 60 °C for 6 h in a glass tube (Büchi), in which they were transferred into an argon-filled glovebox (MBraun, H2O and O2 <0.1 ppm).