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An Agglomerate Model of Lithium-Ion Battery Cathodes

Lueth, Sabine and Sauter, U. S. and Bessler, Wolfgang G. (2016) An Agglomerate Model of Lithium-Ion Battery Cathodes. Journal of The Electrochemical Society, 163 (2), A210-A222. Electrochemical Society, Inc.. DOI: [10.1149/2.0291602jes] ISSN 0013-4651

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Official URL: http://jes.ecsdl.org/

Abstract

In this work a mathematical model for describing the performance of lithium-ion battery electrodes consisting of porous active material particles is presented. The model represents an extension of the Newman-type model, accounting for the Agglomerate structure of the active material particles, here Li(Ni1/3Co1/3Mn1/3)O2 (NCM) and Li(Ni1/3Co1/3Al1/3)O2 (NCA). To this goal, an additional pore space is introduced on the active material level. The space is filled with electrolyte and a charge-transfer reaction takes place at the liquid-solid interface within the porous active material particles. Volume-averaging techniques are used to derive the model equations. A local Thiele modulus is defined and provides an insight into the potentially limiting factors on the active material level. The introduction of a liquid-phase ion transport within the active material reduces the overall transport losses, while the additional active surface area within the agglomerate lowers the charge-transfer resistance. As a consequence, calculated discharge capacities are higher for particles modeled as agglomerates. This finding is more pronounced in the case of high C-rates.

Item URL in elib:https://elib.dlr.de/109376/
Document Type:Article
Title:An Agglomerate Model of Lithium-Ion Battery Cathodes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lueth, SabineRobert Bosch GmbHUNSPECIFIED
Sauter, U. S.Robert Bosch GmbHUNSPECIFIED
Bessler, Wolfgang G.wolfgang.bessler (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:Journal of The Electrochemical Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:163
DOI :[10.1149/2.0291602jes]
Page Range:A210-A222
Publisher:Electrochemical Society, Inc.
ISSN:0013-4651
Status:Published
Keywords:Model of Lithium-Ion Battery Agglomerates Posrosity
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (Batteries) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:12 Dec 2016 13:48
Last Modified:08 Mar 2018 18:46

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