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Aging of LNMO-Based Lithium Ion Battery Pouch Cells

Schmitt, Christina and Sotta, Dane and Martin, Agathe and Cédric, Debruyne and Reynier, Yvan and Buga, Mihaela and Ungureanu, Cosmin and Kopljar, Dennis and Friedrich, K. Andreas (2023) Aging of LNMO-Based Lithium Ion Battery Pouch Cells. 18th Ulm Electrochemical Talks, 14.-15. Juni, 2023, Ulm, Deutschland.

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Cobalt-free cathode materials are a key factor for building more sustainable and costeffective batteries. One promising cobalt-free material is the high-voltage spinel LNMO (LiNi0.5Mn1.5O4) due to its high energy density and high operating voltage of 4.7 V. However, the high operating voltage has also its drawbacks. Commonly used carbonate-based electrolytes oxidize at high voltages, leading to the continuous formation of a cathodeelectrolyte interface (CEI). Additionally, LNMO is prone to transition metal dissolution which not only leads to a reduced stability of the cathode active material but due to migration and deposition of the transition metals on the anode surface also to an altered solid electrolyte interface (SEI) formation and significant impedance rise of the anode.1 Both ageing mechanisms provoke increased lithium loss and high resistances and thus a poor cycling performance.2, 3 In the Horizon 2020 LC-BAT5 project HYDRA, LNMO-based prototype pouch cells are developed and built. Herein, their performance and cycling behavior are analyzed by electrochemical methods such as differential voltage analysis and impedance spectroscopy to investigate the influence of upper cut-off voltage, charge and discharge current rate as well as temperature on the degradation. We thereby reveal the main degradation modes as a function of the cycling conditions and derive solutions on how to increase the cycle life. 1. C. Zhan, T. Wu, J. Lu and K. Amine, Energy Environ. Sci., 11 (2), 243-257 (2018). 2. J. Ma, P. Hu, G. Cui and L. Chen, Chem. Mater., 28 (11), 3578-3606 (2016). 3. W. Li, Y.-G. Cho, W. Yao, Y. Li, A. Cronk, R. Shimizu, M. A. Schroeder, Y. Fu, F. Zou, V. Battaglia, A. Manthiram, M. Zhang and Y. S. Meng, J. Power Sources, 473, (2020)

Item URL in elib:https://elib.dlr.de/195991/
Document Type:Conference or Workshop Item (Poster)
Title:Aging of LNMO-Based Lithium Ion Battery Pouch Cells
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schmitt, ChristinaUNSPECIFIEDhttps://orcid.org/0000-0002-4095-7611UNSPECIFIED
Kopljar, DennisUNSPECIFIEDhttps://orcid.org/0000-0002-2228-2016UNSPECIFIED
Friedrich, K. AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-2968-5029UNSPECIFIED
Date:June 2023
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Li-ion battery, LNMO, pouch cells
Event Title:18th Ulm Electrochemical Talks
Event Location:Ulm, Deutschland
Event Type:international Conference
Event Dates:14.-15. Juni, 2023
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Electrochemical Energy Storage
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Schmitt, Christina
Deposited On:14 Jul 2023 13:02
Last Modified:14 Jul 2023 13:02

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