The newly developed CAPode and G-Cap devices have demonstrated strong potential as supercapacitor diodes and switchable transistors, showing remarkable stability, highly efficient current rectifications of RI = 58 and RII = 95%, and rapid switching capabilities of 97.5%. The rapid H + intercalation and deintercalation into nanostructured h-WO3 electrodes is crucial to achieve excellent performance. These characteristics are ideal for ionologic gate applications.