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The use of non-dimensional parameters to study stress in lithiumion battery electrode storage particles
Authors
,
RM McMeeking
RT Purkayastha
Publication date
1 December 2012
Publisher
Abstract
Mechanical degradation is thought to be one of the causes of capacity fade within Lithium-Ion batteries. In this work we develop a coupled stress-diffusion model for idealized spherical storage particles, which is analogous to the development of thermal strains. We then non-dimensionalize the model and identify three important parameters that control the development of stress within these particles. We can therefore use a wide number of values for these parameters to make predictions about the stress responses of different materials. The maximum stress developed within the particle for different values of these parameters are plotted as stress maps. A two dimensional model of a battery was then developed, in order to study the effect of particle morphology. Copyright © 2012 by ASME
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CUED - Cambridge University Engineering Department
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Last time updated on 15/07/2020