Studies of Lithium Diffusivity of Silicon-Based Film Electrodes for Rechargeable Lithium Batteries

Nguyen, Cao Cuong; Song, Seung-Wan

doi:2013.4.3.108

J. Electrochem. Sci. Technol > Volume 4(3); 2013 > Article

Article

Journal of Electrochemical Science and Technology 2013;4(3):108-112.
DOI: https://doi.org/10.5229/JECST.2013.4.3.108

Studies of Lithium Diffusivity of Silicon-Based Film Electrodes for Rechargeable Lithium Batteries

Department of Fine Chemical Engineering & Applied Chemistry, Chungnam National University;Department of Fine Chemical Engineering & Applied Chemistry, Chungnam National University;

Abstract

Lithium diffusivity of the silicon (Si)-based materials of Si-Cu and $SiO_x$ (x = 0.4, 0.85) with improved interfacial stability to electrolyte have been determined, using variable rate cyclic voltammetry with film model electrodes. Lithium diffusivity is found to depend on the intrinsic properties of anode material and electrolyte; the fraction of oxygen for $SiO_x$ (x = 0.4, 0.85), which is directly related to electrical conductivity, and the electrolyte type with different ionic conductivity and viscosity, carbonate-based liquid electrolyte or ionic liquid-based electrolyte, affect the lithium diffusivity.

Key Words: Rechargeable lithium batteries, Si-based anode, Lithium diffusivity, Film model electrode