All-Inorganic Ionic Polymer-Based Memristor for High-Performance and Flexible Artificial Synapse
Yong-Yan Zhao, Wu-Ji Sun, Jia Wang, Jing-Hui He*（贺竞辉）, Hua Li, Qing-Feng Xu, Na-Jun Li,Dong-Yun Chen, and Jian-Mei Lu*（路建美）
College of Chemistry, Chemical Engineering and Materials Science,Collaborative Innovation Center of Suzhou Nano Science and Technology,National-Local Joint Engineering Laboratory for Absorptive Materials and Technologies in Environmental Protection,National Center for International Research on Intelligent Nano-Materials and Detection Technologies in Environmental Protection,Soochow University,Suzhou 215123, P. R. China
Adv. Funct. Mater. 2020, 30, 2004245
The implementation of memristors that are wearable and transparent has attracted significant attention. However, the development of high‐performance memristors that simultaneously possess high flexibility and environmental stability has remained a tremendous challenge suffering from limited choice of materials with both good ion‐electron mobility and structural flexibility. Inspired by the unique poly‐ionic nature of ammonium polyphosphate (APP), a novel Au/APP/ITO memristor with favorable flexibility and stability is prepared. Synaptic behaviors can be stimulated by voltage pulses that are 20 ns in width, 0.1 V in amplitude, and repeatable under 104 pulse cycles, thereby outperforming several other benchmark memristors. Further, the device, prepared on conductive silicone, can sustain its synaptic performance even under 360° bending. Furthermore, the device can sustain its synaptic behaviors even after exposure to fire for 60 s and 5.6 kGy of ionic irradiation. Additionally, APP is determined to be nontoxic, biodegradable, and transparent when compared with all the organics and inorganics used in previous memristors. The results of this study will inspire the development of more inorganic polymers for their utilization in future environmentally stable and flexible electronics.