Ion/electron-coupling logic operation is recognized as the most promising approach to achieving in-depth brain-inspired computing, but the lack of high-performance ion/electron-coupling devices with high operating frequencies much restricts the fast development of this field. Accordingly, we herein report an orthorhombic niobium pentoxide (T-Nb2O5) based lithium-ion capacitor diode (CAPode) that possesses thoroughly improved performances to achieve multifrequency ion/electron-coupling logic operations. Specifically, benefiting from the unique crystal structure and fast ion-transport topology of T-Nb2O5, the constructed CAPode exhibits a high response frequency of up to 122 Hz, over three orders of magnitude higher than those of the state-of-the-art CAPodes. Meanwhile, the T-Nb2O5 based CAPode delivers a record-high rectification ratio of 108, a high specific capacity of 390 C g-1, a wide voltage window of -1.5-1.5 V, and a superior cycling stability over 2000 cycles. Combining these performance advantages, the T-Nb2O5 based CAPode is demonstrated to be fully competent in typical AND and OR logic gates over a wide frequency range of 1-100 Hz, validating great potential in the burgeoning field of multifrequency ion/electron-coupling logic operations.
Keywords: brain-inspired computing; ion-sieving effect; logic operation circuit; niobium pentoxide; supercapacitor diode.
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