physica status solidi (RRL) – Rapid Research Letters
The Nature of Lithium-Ion Transport in Low Power Consumption LiFePO4 Resistive Memory with Graphite as Electrode
Lei Zhang, Cheng Wu, Jun Liu, Xiaoning Zhao, Zhongqiang Wang, Haiyang Xu, Liancheng Wang, Yichun Liu
Lithium-ion migration modulated by the electric field in Li compounds has been studied extensively in Li-ion batteries, which has offered also potential application in ion-migrationrelated resistive switching (RS) memories. However, the related RS mechanism remains elusive in electrode/Li compound/electrode device structure. In article no. 1800320, Xiaoning Zhao and co-workers develop a LiFePO4 RS memory (Au/LiFePO4/Graphite) with Au and graphite sheet as electrodes. The devices can be operated with a low power consumption (< 30mW) and the RS mechanism is ascribed to Li concentration-related reversible conductivity switching in LiFePO4, arising from Li ions insertion/extraction through the graphite electrode. The results provide important guidelines for designing high performance Li-based RS memories from the view point of optimizing the electrode materials and the development of low power RS memories.