Influence of contouring the lithium metal/solid electrolyte interface on the critical current for dendrites

Shengming Zhang, Bingkun Hu, Zeyang Geng, Xiangwen Gao, Dominic Spencer-Jolly, Dominic L.R. Melvin, Ziyang Ning, Guanchen Li, Max Jenkins, Longlong Wang, Hui Gao, Shengda D. Pu, T. James Marrow, Charles W. Monroe, Peter G. Bruce

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Contouring or structuring of the lithium/ceramic electrolyte interface and therefore increasing its surface area has been considered as a possible strategy to increase the charging current in solid-state batteries without lithium dendrite formation and short-circuit. By coupling together lithium deposition kinetics and the me chanics of lithium creep within calculations of the current distribution at the interface, and leveraging a model for lithium dendrite growth, we show that efforts to avoid dendrites on charging by increasing the interfacial surface area come with significant limitations associated with the topography of rough surfaces. These limitations are sufficiently severe such that it is very unlikely contouring could increase charging currents while avoiding dendrites and short-circuit to the levels required. For example, we show a sinusoidal surface topography can only raise the charging current before dendrites occur by approx. 50% over a flat interface.

Original languageEnglish
Pages (from-to)1448-1456
Number of pages9
JournalEnergy and Environmental Science
Volume17
Issue number4
DOIs
StatePublished - 26 Jan 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2024 The Royal Society of Chemistry.

Funding

P. G. B. is indebted to the Faraday Institution (FIRG026), the Engineering and Physical Sciences Research Council (EP/M009521/1), and the Henry Royce Institute for Advanced Materials for financial support (EP/R00661X/1, EP/S019367/1, and EP/R010145/1). The authors acknowledge use of characterisation facilities within the David Cockayne Centre for Electron Microscopy, Department of Materials, University of Oxford, alongside financial support provided by the Henry Royce Institute (Grant ref EP/R010145/1). The X-ray tomography facilities were funded by EPSRC Grant [EP/M02833X/1] “University of Oxford: experimental equipment upgrade”.

FundersFunder number
Henry Royce InstituteEP/S019367/1, EP/R00661X/1, EP/R010145/1
Faraday InstitutionFIRG026
Engineering and Physical Sciences Research CouncilEP/M009521/1, EP/M02833X/1

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