Short-Time Transient Analysis of Intercalation of an Ion into a Sphere

Abstract

A short-time transient analysis is presented for a sinusoidal input potential for a spherical particle. The objective of this work was to extract accurate values of the parameters associated with an intercalation into a spherical particle. These parameters are exchange current density, double-layer capacitance, and diffusion coefficient. The effects of these parameters on the response were examined using a sensitivity analysis, which indicated that optimum frequency values of the input perturbation exist for estimation of these parameters. A procedure is presented to obtain all these parameters using the short-time response. The results show that the short-time analysis is a useful method for estimating rapidly the values of these parameters of a system.

Least Squares Galvanostatic Intermittent Titration Technique (LS-GITT) for Accurate Solid Phase Diffusivity Measurement

“…This technique is not applicable to single phase materials, however, which are the focus of the LSM in this paper. 13 presents a theoretical transient analysis of the Lithium ion intercalation process for accurate D s measurement based on simulation data, but the corresponding experiments require specialized testing. The Least Squares Method (LSM) is a simple parameter estimation method for linear, time-invariant models.…”