Interfacial resistive switching by multiphase polarization in ion-intercalation nanofilms

Abstract

Nonvolatile resistive-switching (RS) memories promise to revolutionize hardware architectures with in-memory computing. Recently, ion-interclation materials have attracted increasing attention as potential RS materials for their ion-modulated electronic conductivity. In this Letter, we propose RS by multiphase polarization (MP) of ion-intercalated thin films between ion-blocking electrodes, in which interfacial phase separation triggered by an applied voltage switches the electron-transfer resistance. We develop an electrochemical phase-field model for simulations of coupled ion-electron transport and ion-modulated electron-transfer rates and use it to analyze the MP switching current and time, resistance ratio, and current-voltage response. The model is able to reproduce the complex cyclic voltammograms of lithium titanate (LTO) memristors, which cannot be explained by existing models based on bulk dielectric breakdown. The theory predicts the achievable switching speeds for multiphase ion-intercalation materials and could be used to guide the design of high-performance MP-based RS memories.

References in corpus (22)

• Training and Operation of an Integrated Neuromorphic Network Based on Metal-Oxide Memristors
• Theory of Chemical Kinetics and Charge Transfer based on Nonequilibrium Thermodynamics
• Suppression of Phase Separation in LiFePO4 Nanoparticles During Battery Discharge
• Coherency strain and the kinetics of phase separation in LiFePO4
• Charge Transfer Kinetics at the Solid-Solid Interface in Porous Electrodes
• Overlimiting current in a microchannel
• Challenges in materials and devices for Resistive-Switching-based Neuromorphic Computing
• Configurational electronic entropy and the phase diagram of mixed-valence oxides: the case of Li${}_x$FePO${}_4$
• Phase field modeling of electrochemistry I: Equilibrium
• Ultrafast lithium diffusion in bilayer graphene
• Electrochemical Ion Insertion: From Atoms to Devices
• Current-induced membrane discharge
• Theory of Nucleation in Phase-separating Nanoparticles
• Phase Field Theory of Heterogeneous Crystal Nucleation
• Desalination shocks in microstructures
• Phase field modeling of electrochemistry II: Kinetics
• Intercalation kinetics in multiphase layered materials
• Concentration polarization, surface currents, and bulk advection in a microchannel
• Explaining key properties of lithiation in TiO${}_2$-anatase Li-ion battery electrodes using phase-field modelling
• Interplay of phase boundary anisotropy and electro-autocatalytic surface reactions on the lithium intercalation dynamics in Li${}_X$FePO${}_4$ platelet-like nanoparticles
• Theory of shock electrodialysis I: Water dissociation and electrosmotic vortices
• Dielectric breakdown by electric-field induced phase separation

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