Imperial College London
Alternate

Prof Gregory Offer

Faculty of Engineering, Department of Mechanical Engineering

Professor in Electrochemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7072gregory.offer Website

 
 
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Location

 

720City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Li:2022:1945-7111/ac6f84,
author = {Li, R and O'Kane, S and Marinescu, M and Offer, GJ},
doi = {1945-7111/ac6f84},
journal = {Journal of The Electrochemical Society},
pages = {1--14},
title = {Modelling solvent consumption from SEI layer growth in lithium-ion batteries},
url = {http://dx.doi.org/10.1149/1945-7111/ac6f84},
volume = {169},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Predicting lithium-ion battery (LIB) lifetime is one of the most important challenges holding back the electrification of vehicles,aviation, and the grid. The continuous growth of the solid-electrolyte interface (SEI) is widely accepted as the dominantdegradation mechanism for LIBs. SEI growth consumes cyclable lithium and leads to capacity fade and power fade via severalpathways. However, SEI growth also consumes electrolyte solvent and may lead to electrolyte dry-out, which has only beenmodelled in a few papers. These papers showed that the electrolyte dry-out induced a positive feedback loop between loss of activematerial (LAM) and SEI growth due to the increased interfacial current density, which resulted in capacity drop. This work,however, shows a negative feedback loop between LAM and SEI growth due to the reduced solvent concentration (in our case,EC), which slows down SEI growth. We also show that adding extra electrolyte into LIBs at the beginning of life can greatlyimprove their service life. This study provides new insights into the degradation of LIBs and a tool for cell developers to designlonger lasting batteries.
AU  - Li,R
AU  - O'Kane,S
AU  - Marinescu,M
AU  - Offer,GJ
DO  - 1945-7111/ac6f84
EP  - 14
PY  - 2022///
SN  - 0013-4651
SP  - 1
TI  - Modelling solvent consumption from SEI layer growth in lithium-ion batteries
T2  - Journal of The Electrochemical Society
UR  - http://dx.doi.org/10.1149/1945-7111/ac6f84
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000809241700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://iopscience.iop.org/article/10.1149/1945-7111/ac6f84
UR  - http://hdl.handle.net/10044/1/97719
VL  - 169
ER  -
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