Is the CAPode reversely polarized under "blocked" (unchargeable) polarization (backward bias direction), only an insignificant current flow can be observed. Beyond the high achievable rectification ratio the asymmetric EDLC allows forward and reverse charge storage in one polarization direction which is a main advantage in comparison to conventional semiconductorbased diodes. Using this approach, new functionality was implemented into EDLCs expanding their typical utility beyond their conventional role as energy storage devices. Different potential applications are imaginable and partially already tested ranging from ion sieving, current rectification, and grid stabilization to ion-based logic gates and energy efficient computing. Shortly after physical ion-sieving CAPodes based on purely capacitive energy storage were proposed, also battery-like, hybrid EC-diodes based on ion-selective surface redox reactions or selective intercalation of ions into the electrode material were reported. An important step towards microintegration was to convert the macroscopic sandwich-like setup of the CAPode into a miniaturized, in-plane, and 3D-printed version by designing two printable inks (microporous carbon precursor based on resorcinol-formaldehyde and a Ketjenblack based mesoporous carbon suspension) leading to a structured ultramicroporous (Cmicro) as well as mesoporous carbon (Cmeso) electrode (Figure ). By using a combination of extrusion and inkjet printing the CAPode electrodes were remote-controlled and precisely deposited onto a substrate material with small lateral dimensions and very similar rectification performance compared to the macroscopic CAPode. The deliberate material design and process integration via 3D printing technique was an essential milestone for the realization of logic gates (OR, AND) as well as in a switchable high-pass filter application underlining their potential as miniaturized and planar ion-computing devices.