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Materials 2019, 12(5), 831; https://doi.org/10.3390/ma12050831

Simulation-driven Selection of Electrode Materials Based on Mechanical Performance for Lithium-Ion Battery

Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
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Received: 19 February 2019 / Revised: 7 March 2019 / Accepted: 8 March 2019 / Published: 12 March 2019
(This article belongs to the Special Issue Advances in Electrochemical Energy Materials)
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Abstract

Experimental and numerical studies have shown that mechanical loading associated with lithiation/delithiation may limit the useful life of battery electrode materials. The paper presents an approach to parameterize and compare electrode material performance based on mechanical stability. A mathematical model was developed to determine particle deformation and stress fields based upon an elastic-perfectly plastic constitutive response. Mechanical deformation was computed by combining the stress equilibrium equations with the electrochemical diffusion of lithium ions into the electrode particle. The result provided a time developing stress field which shifts from purely elastic to partially plastic deformation as the lithium-ion diffuses into the particle. The model was used to derive five merit indices that parameterize mechanical stability of electrode materials. The merit indices were used to analyze the mechanical stability for the six candidate electrode materials—three for anode materials and three for the cathode material. Finally, the paper suggests ways to improve the mechanical performance of electrode materials and identifies mechanical properties that need to be considered for selection and optimal design of electrode materials. View Full-Text
Keywords: lithium-ion battery; mechanical stability; material index; parametric analysis; elasto-plastic stress lithium-ion battery; mechanical stability; material index; parametric analysis; elasto-plastic stress
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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 (CC BY 4.0).
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Sarkar, A.; Shrotriya, P.; Chandra, A. Simulation-driven Selection of Electrode Materials Based on Mechanical Performance for Lithium-Ion Battery. Materials 2019, 12, 831.

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