General Design Concepts for CAPodes as Ionologic Devices

Research output: Contribution to journalResearch articleContributedpeer-review



Capacitive analogues of semiconductor diodes (CAPodes) present a new avenue for energy-efficient and nature-inspired next-generation computing devices. Here, we disclose the generalized concept for bias-direction-adjustable n- and p-CAPodes based on selective ion sieving. Controllable-unidirectional ion flux is realized by blocking electrolyte ions from entering sub-nanometer pores. The resulting CAPodes exhibit charge-storage characteristics with a high rectification ratio (96.29 %). The enhancement of capacitance is attributed to the high surface area and porosity of an omnisorbing carbon as counter electrode. Furthermore, we demonstrate the use of an integrated device in a logic gate circuit architecture to implement logic operations (‘OR’, ‘AND’). This work demonstrates CAPodes as a generalized concept to achieve p-n and n-p analogue junctions based on selective ion electrosorption, provides a comprehensive understanding and highlights applications of ion-based diodes in ionologic architectures.


Original languageEnglish
Article numbere202305397
JournalAngewandte Chemie - International Edition
Issue number34
Publication statusPublished - 21 Aug 2023

External IDs

WOS 001027640900001


ASJC Scopus subject areas


  • Capacitive Analogues of Semiconductor Diodes, Ionologic Devices., Porous Carbon, Supercapacitors, Ionologic Devices