Cell-Format-Dependent Mechanical Damage in Silicon Anodes

Marco-Tulio Rodrigues, Sathish Rajendran, Stephen Trask, Alison Dunlop, Avtar Singh, Jeffery Allen, Peter Weddle, Juliane Preimesberger, Jaclyn Coyle, Andrew Colclasure, Zhenzhen Yang, Brian Ingram, Andrew Jansen

Research output: Contribution to journalArticlepeer-review

Abstract

Strong binders can be counterproductive for silicon anodes. Here, we show that stresses from cycling Si-based electrodes can cause permanent stretching and wrinkling of the current collector. This deformation damages the electrode coating and accelerates cell aging due to the inactivation of Si domains and facilitation of Li plating. Interestingly, we demonstrate that the formation of wrinkles is size-dependent, being present in pouch cells but absent from coin cells. This size-dependent performance decay indicates that, in extreme cases, testing outcomes are highly dependent on scale and that the validation of battery materials may require testing at larger cell formats.

Original languageAmerican English
Pages (from-to)9243-9248
Number of pages6
JournalACS Applied Energy Materials
Volume6
Issue number18
DOIs
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023 UChicago Argonne, LLC, Operator of Argonne National Laboratory. Published by American Chemical Society.

NREL Publication Number

  • NREL/JA-5700-85754

Keywords

  • binder
  • Li plating
  • mechanical properties
  • polyimide
  • silicon anode
  • SiO
  • wrinkling

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