Reaction-rate distribution at large currents in porous electrodes

Chen, Z; Danilov, DL; Eichel, RA; Notten, PHL

Reaction-rate distribution at large currents in porous electrodes

Chen, Z Danilov, DL Eichel, RA Notten, PHL

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Power Sources, 2023, 581, pp. 233495
Issue Date:: 2023-10-15

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Field	Value	Language
dc.contributor.author	Chen, Z
dc.contributor.author	Danilov, DL
dc.contributor.author	Eichel, RA
dc.contributor.author	Notten, PHL
dc.date.accessioned	2024-05-27T01:11:28Z
dc.date.available	2024-05-27T01:11:28Z
dc.date.issued	2023-10-15
dc.identifier.citation	Journal of Power Sources, 2023, 581, pp. 233495
dc.identifier.issn	0378-7753
dc.identifier.uri	http://hdl.handle.net/10453/179216
dc.description.abstract	Reaction-rate distribution inside porous electrodes influences the overall performance of Li-ion batteries. The design parameters greatly determine the reaction-rate distribution. Therefore, investigating the relationship between the design parameters and the reaction-rate distribution is vital for improving battery performance. In the present paper, the reaction-rate and current-density distributions are analytically derived across porous electrodes at a short time scale with a Tafel approximation of the Butler-Volmer equation. Three sets of solutions are obtained based on applied currents and design parameters of porous electrodes. In all three sets of solutions, the effective ionic and electronic conductivities are found to shift the reaction from the current-collector to the separator interface. The applied current also influences the reaction-rate and current-density distribution. High C-rates increase the nonuniformity of reaction-rate distribution and the non-linearity of the current distribution. In contrast, low C-rates benefit the uniformity of reaction and linearity of current density.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Power Sources
dc.relation.isbasedon	10.1016/j.jpowsour.2023.233495
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Energy
dc.subject.classification	34 Chemical sciences
dc.subject.classification	40 Engineering
dc.title	Reaction-rate distribution at large currents in porous electrodes
dc.type	Journal Article
utslib.citation.volume	581
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2024-05-27T01:11:27Z
pubs.publication-status	Published
pubs.volume	581

Abstract:

Reaction-rate distribution inside porous electrodes influences the overall performance of Li-ion batteries. The design parameters greatly determine the reaction-rate distribution. Therefore, investigating the relationship between the design parameters and the reaction-rate distribution is vital for improving battery performance. In the present paper, the reaction-rate and current-density distributions are analytically derived across porous electrodes at a short time scale with a Tafel approximation of the Butler-Volmer equation. Three sets of solutions are obtained based on applied currents and design parameters of porous electrodes. In all three sets of solutions, the effective ionic and electronic conductivities are found to shift the reaction from the current-collector to the separator interface. The applied current also influences the reaction-rate and current-density distribution. High C-rates increase the nonuniformity of reaction-rate distribution and the non-linearity of the current distribution. In contrast, low C-rates benefit the uniformity of reaction and linearity of current density.

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http://hdl.handle.net/10453/179216