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International Journal of Electrochemistry
Volume 2015, Article ID 439015, 9 pages
http://dx.doi.org/10.1155/2015/439015
Research Article

An Empirical Rate Constant Based Model to Study Capacity Fading in Lithium Ion Batteries

1Department of Chemical Engineering, BITS Pilani, Jawahar Nagar, Hyderabad 500078, India
2Department of Mathematics, BITS Pilani, Jawahar Nagar, Hyderabad 500078, India

Received 26 May 2015; Accepted 15 June 2015

Academic Editor: Sheng S. Zhang

Copyright © 2015 Srivatsan Ramesh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A one-dimensional model based on solvent diffusion and kinetics to study the formation of the SEI (solid electrolyte interphase) layer and its impact on the capacity of a lithium ion battery is developed. The model uses the earlier work on silicon oxidation but studies the kinetic limitations of the SEI growth process. The rate constant of the SEI formation reaction at the anode is seen to play a major role in film formation. The kinetics of the reactions for capacity fading for various battery systems are studied and the rate constants are evaluated. The model is used to fit the capacity fade in different battery systems.