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

doi:10.1021/acsaem.3c01531

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

Argonne National Laboratory

Research output: Contribution to journal › Article › peer-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 language	American English
Pages (from-to)	9243-9248
Number of pages	6
Journal	ACS Applied Energy Materials
Volume	6
Issue number	18
DOIs	https://doi.org/10.1021/acsaem.3c01531
State	Published - 2023

NREL Publication Number

NREL/JA-5700-85754

Keywords

binder
Li plating
mechanical properties
polyimide
silicon anode
SiOx
wrinkling

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10.1021/acsaem.3c01531

Cite this

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title = "Cell-Format-Dependent Mechanical Damage in Silicon Anodes",

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.",

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T1 - Cell-Format-Dependent Mechanical Damage in Silicon Anodes

AU - Rodrigues, Marco-Tulio

AU - Rajendran, Sathish

AU - Trask, Stephen

AU - Dunlop, Alison

AU - Singh, Avtar

AU - Allen, Jeffery

AU - Weddle, Peter

AU - Preimesberger, Juliane

AU - Coyle, Jaclyn

AU - Colclasure, Andrew

AU - Yang, Zhenzhen

AU - Ingram, Brian

AU - Jansen, Andrew

PY - 2023

Y1 - 2023

N2 - 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.

AB - 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.

KW - binder

KW - Li plating

KW - mechanical properties

KW - polyimide

KW - silicon anode

KW - SiOx

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JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

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ER -

Cell-Format-Dependent Mechanical Damage in Silicon Anodes

Abstract

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Keywords

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