Sodium dopant in pectin mediates ionic-electronic coupling on Na0.67Mg0.28Mn0.72O2 for electrolyte-type artificial synapse with tunable plasticity

Abstract

To enhance the plasticity modulation capabilities of two terminal electrolyte-based artificial synapse, we designed a battery-like device that integrates a P2-type intercalated compound, Na0.67Mg0.28Mn0.72O2, with ion-doped pectin electrolytes. Compared to devices utilizing pure pectin, the proposed Na-rich intercalated compound artificial synapse with ion-doped pectin electrolytes, incorporating 0.5 wt. % additives, demonstrates a remarkable 2000% improvement in response. Furthermore, by leveraging the additional capacity provided by nonbonding O 2p orbitals, the device achieves a balance between short-term plasticity and memory enhancement, modulating interface behavior from the electric double layer to electrochemical doping. As a result, it facilitates functions such as high-pass filtering, Morse coding, information decryption, and sensory memory temporariness. Additionally, the controllable temporal dynamics of the high-response device with doped electrolytes enable high-accuracy pattern recognition. This enhancement in plasticity modulation capability positions the device as a promising candidate for intelligent systems that integrate perception and processing.