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Title: Effect of overcharge on Li(Ni 0.5Mn 0.3Co 0.2)O 2/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode

Abstract

Cells based on NMC/graphite, containing poly(vinylidene difluoride) (PVDF) binders in the positive and negative electrodes, were systematically overcharged to 100, 120, 140, 160, 180, and 250% state-of-charge (SOC). At 250% SOC the cell vented. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) of the anodes showed several state-of-overcharge-dependent trends. Starting at 120% SOC, dendrites appeared and increased in concentration as the SOC increased. Dendrite morphology appeared to be dependent on whether the active material was on the “dull” or “shiny” side of the copper collector. Significantly more delamination of the active material from the collector was seen on the “shiny” side of the collector particularly at 180 and 250% SOC. Transition metals were detected at 120% SOC and increased in concentration as the SOC increased. Finally, there was considerable spatial heterogeneity in the microstructures across each laminate with several regions displaying complex layered structures.

Authors:
 [1];  [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [3];  [3];  [3];  [3];  [3];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Power Sources Technology Group
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1439931
Alternate Identifier(s):
OSTI ID: 1460965
Grant/Contract Number:  
AC05-00OR22725; AC02-06CH11357; NA0003525
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 385; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Lithium-ion battery; Overcharge; Scanning electron microscopy; Microstructure; SEI; Anode; scanning electron microscopy; anode; microstructure; overcharge

Citation Formats

Dietz Rago, Nancy, Bareno, Javier, Li, Jianlin, Du, Zhijia, Wood, David L., Steele, Leigh Anna, Lamb, Joshua, Spangler, Scott, Grosso, Christopher, Fenton, Kyle, and Bloom, Ira. Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode. United States: N. p., 2018. Web. doi:10.1016/j.jpowsour.2018.01.009.
Dietz Rago, Nancy, Bareno, Javier, Li, Jianlin, Du, Zhijia, Wood, David L., Steele, Leigh Anna, Lamb, Joshua, Spangler, Scott, Grosso, Christopher, Fenton, Kyle, & Bloom, Ira. Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode. United States. doi:10.1016/j.jpowsour.2018.01.009.
Dietz Rago, Nancy, Bareno, Javier, Li, Jianlin, Du, Zhijia, Wood, David L., Steele, Leigh Anna, Lamb, Joshua, Spangler, Scott, Grosso, Christopher, Fenton, Kyle, and Bloom, Ira. Sat . "Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode". United States. doi:10.1016/j.jpowsour.2018.01.009. https://www.osti.gov/servlets/purl/1439931.
@article{osti_1439931,
title = {Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode},
author = {Dietz Rago, Nancy and Bareno, Javier and Li, Jianlin and Du, Zhijia and Wood, David L. and Steele, Leigh Anna and Lamb, Joshua and Spangler, Scott and Grosso, Christopher and Fenton, Kyle and Bloom, Ira},
abstractNote = {Cells based on NMC/graphite, containing poly(vinylidene difluoride) (PVDF) binders in the positive and negative electrodes, were systematically overcharged to 100, 120, 140, 160, 180, and 250% state-of-charge (SOC). At 250% SOC the cell vented. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) of the anodes showed several state-of-overcharge-dependent trends. Starting at 120% SOC, dendrites appeared and increased in concentration as the SOC increased. Dendrite morphology appeared to be dependent on whether the active material was on the “dull” or “shiny” side of the copper collector. Significantly more delamination of the active material from the collector was seen on the “shiny” side of the collector particularly at 180 and 250% SOC. Transition metals were detected at 120% SOC and increased in concentration as the SOC increased. Finally, there was considerable spatial heterogeneity in the microstructures across each laminate with several regions displaying complex layered structures.},
doi = {10.1016/j.jpowsour.2018.01.009},
journal = {Journal of Power Sources},
issn = {0378-7753},
number = C,
volume = 385,
place = {United States},
year = {2018},
month = {3}
}

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