The voltage window of the designed CAPode plays a crucial role in the application of CAPode as a core for the G-Cap system. Therefore, the voltage windows are tested symmetrically around the switching point (zero voltage) (Figure ). All tested systems show excellent prospective to be used as CAPode even in a voltage window reaching ±2.2 V. Although, the CV curve shapes of all tested CAPode systems are very promising under a low voltage window, increasing the voltage window leads to an increase in the current response in "blocked" polarization due to electrolyte decomposition limiting the usage of these electrolytes.