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Mathematical model for combined effect of SEI formation and gas evolution in Li-ion batteries

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Rashid, Muhammad and Gupta, A. (2014) Mathematical model for combined effect of SEI formation and gas evolution in Li-ion batteries. ECS Electrochemistry Letters, 3 (10). A95-A98. doi:10.1149/2.0041410eel

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Official URL: http://dx.doi.org/10.1149/2.0041410eel

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Abstract

In this study, a mathematical model to investigate the combined effect of SEI film formation and gas evolution over the degradation of Li-ion cells is developed. A Li-ion cell is simulated for three discharge/charge rates until 80% of the rated capacity is irreversibly lost in side reactions. The model shows that the thickness of SEI film and volume of gases evolved is between 0.03–0.22 μm and 1.6–10.6%, respectively. It is shown that, in addition to greater diffusion limitations, capacity degradation at higher cycling rates is faster due to reduction in cyclable lithium caused by its accumulation in the negative electrode.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Lithium ion batteries
Journal or Publication Title: ECS Electrochemistry Letters
Publisher: Electrochemical Society, Inc.
ISSN: 2162-8726
Official Date: 6 August 2014
Dates:
DateEvent
6 August 2014Published
11 July 2014Accepted
Volume: 3
Number: 10
Page Range: A95-A98
DOI: 10.1149/2.0041410eel
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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