Journal
JOURNAL OF POWER SOURCES
Volume 165, Issue 2, Pages 880-886Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2006.12.056
Keywords
Duhamel superposition method; corrected diffusion length method; polynomial approximation; pseudo steady state method
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Approximation methods are often used in porous electrode models to eliminate the need to solve the local solid phase diffusion equation. These methods include Duhamel's superposition method, a diffusion length method and a polynomial approximation method which have long been used in the literature. The pseudo steady state (PSS) method is a method that has been used recently to develop a solution to the diffusion equation in a spherical particle with time dependent boundary conditions, but the PSS method has not been used in a porous electrode model. These methods are compared to each other in a dimensionless analysis study, and they are used in a porous electrode model to predict the discharge curves for a LiCoO2 electrode. Simulation results presented here indicate that the PSS method or the high order polynomial method should be used in a porous electrode model to obtain accuracy and save computation time. (c) 2007 Elsevier B.V. All rights reserved.
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