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Title: (Invited) Effect of Aging on Mechanical Properties of Lithium Ion Cell Components

Abstract

The mechanical properties of aged and fresh lithium ion cell components are evaluated in this paper. Cells components were obtained from destructive physical analysis of 40Ah NMC/Graphite-based pouch cells before and after cycling and were subjected to mechanical testing. The aging tests comprised of cycling the cell across a voltage window of 4.1V to 3.0V at room temperature (25?). Using a 2C charging rate and 1C discharging rate, the cells were subjected to over 5600 cycles before a 80% drop in the name-plate capacity was observed. Mechanical tests, including compression test, tensile test and indentation test, were conducted on the cell components to investigate differences in the mechanical performance. Comparison of the fresh and aged cells components shows that cycling the cells has different degrees of impact on the different cell components. Anodes suffered the most serious deterioration in mechanical properties while separators remained intact under the test condition investigated.

Authors:
; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1404871
Report Number(s):
NREL/JA-5400-70349
Journal ID: ISSN 1938-6737
DOE Contract Number:
AC36-08GO28308
Resource Type:
Journal Article
Resource Relation:
Journal Name: ECS Transactions (Online); Journal Volume: 77; Journal Issue: 11
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; mechanical testing; aging effects; degradation; tensile and compression tests

Citation Formats

Wu, Zenan, Cao, Lei, Hartig, Julia, and Santhanagopalan, Shriram. (Invited) Effect of Aging on Mechanical Properties of Lithium Ion Cell Components. United States: N. p., 2017. Web. doi:10.1149/07711.0199ecst.
Wu, Zenan, Cao, Lei, Hartig, Julia, & Santhanagopalan, Shriram. (Invited) Effect of Aging on Mechanical Properties of Lithium Ion Cell Components. United States. doi:10.1149/07711.0199ecst.
Wu, Zenan, Cao, Lei, Hartig, Julia, and Santhanagopalan, Shriram. Fri . "(Invited) Effect of Aging on Mechanical Properties of Lithium Ion Cell Components". United States. doi:10.1149/07711.0199ecst.
@article{osti_1404871,
title = {(Invited) Effect of Aging on Mechanical Properties of Lithium Ion Cell Components},
author = {Wu, Zenan and Cao, Lei and Hartig, Julia and Santhanagopalan, Shriram},
abstractNote = {The mechanical properties of aged and fresh lithium ion cell components are evaluated in this paper. Cells components were obtained from destructive physical analysis of 40Ah NMC/Graphite-based pouch cells before and after cycling and were subjected to mechanical testing. The aging tests comprised of cycling the cell across a voltage window of 4.1V to 3.0V at room temperature (25?). Using a 2C charging rate and 1C discharging rate, the cells were subjected to over 5600 cycles before a 80% drop in the name-plate capacity was observed. Mechanical tests, including compression test, tensile test and indentation test, were conducted on the cell components to investigate differences in the mechanical performance. Comparison of the fresh and aged cells components shows that cycling the cells has different degrees of impact on the different cell components. Anodes suffered the most serious deterioration in mechanical properties while separators remained intact under the test condition investigated.},
doi = {10.1149/07711.0199ecst},
journal = {ECS Transactions (Online)},
number = 11,
volume = 77,
place = {United States},
year = {Fri Jul 07 00:00:00 EDT 2017},
month = {Fri Jul 07 00:00:00 EDT 2017}
}