A Model of Concurrent Lithium Dendrite Growth, SEI Growth, SEI Penetration and Regrowth

By Guangyu Liu, W. Lu. 2017

138 citations recorded by the source corpus.

We present a model that enables simulations of concurrent coupled lithium dendrite growth, SEI formation and growth on the dendrite surface, dendrite penetration of the SEI layer, and SEI regrowth. The concept of SEI coverage density is introduced, which is conceptuallysimilartoSEIthicknessbutbroader.SEIanddendritegrowthinteractswitheachotherbyevolvingdendritemorphology,stretchingofSEIbythedendritesurface,andtheeffectofevolvingSEIthickness(coveragedensity)onlithiumdepositionreaction.Themodelshowsthatevenunderlowcurrentdensity,smallprotrusionsonlithiumsurfacecanstillgrowintodendritesbypenetratingSEIandcausinginhomogeneouselectricalresistanceondendritesurface.Wefindthatdendritegrowthshowstwodistinctstages:fastaccelerationduringSEIpenetration,andstablegrowthafterreachinganequilibriumSEIthicknessatthedendritetip.Underlowcurrentdensity,increasingcurrentscalesupthegrowthrateofdendritewithoutmuchshapechange.Highcurrentdensitycausesdendritemorphologytochangesignificantly,forminganeedleshape.WeshowthatlocalSEIdefects/inhomogeneitycaninducedendriteformationandgrowth.Ourstudysuggeststhatflatlithiumsurface,uniformSEIlayer,andlowSEIresistivityareimportanttoreducedendriteformation.©TheAuthor(s)2017.PublishedbyECS.ThisisanopenaccessarticledistributedunderthetermsoftheCreativeCommonsAttribution4.0License(CCBY,http://creativecommons.org/licenses/by/4.0/),whichpermitsunrestrictedreuseoftheworkinanymedium,providedtheoriginalworkisproperlycited.[DOI:10.1149/2.0381709jes]Allrightsreserved.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/116c1d1f7c0b87cec03ddfd8f5a675087e3c72bd

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In Automotive Engineering

1. Xianke Lin
2. Kavian Khosravinia
3. Wei Dang Lu
4. Xiaosong Hu
5. Ju Li

In Electrical and Electronic Engineering

1. Xianke Lin
2. Kavian Khosravinia
3. Wei Dang Lu
4. Xiaosong Hu
5. Ju Li

Citations in the corpus

• Lithium Plating Mechanism, Detection, and Mitigation in Lithium-Ion Batteries (2021, background): “Vibration could cause the SEI layer to break [269] and SEI has been shown to interact with lithium plating [50].”