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

Nancy Dietz Rago; Javier Bareño; Jianlin Li; Zhijia Du; David L. Wood; Leigh Anna Steele; Joshua Lamb; Scott Spangler; Christopher Grosso; Kyle Fenton; Ira Bloom

doi:10.1016/j.jpowsour.2018.01.009

Effect of overcharge on Li(Ni_0.5Mn_0.3Co_0.2)O₂/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode

Nancy Dietz Rago, Javier Bareño, Jianlin Li, Zhijia Du, David L. Wood, Leigh Anna Steele, Joshua Lamb, Scott Spangler, Christopher Grosso, Kyle Fenton, Ira Bloom

Emerging and Solid-State Batteries

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

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. There was considerable spatial heterogeneity in the microstructures across each laminate with several regions displaying complex layered structures.

Original language	English
Pages (from-to)	148-155
Number of pages	8
Journal	Journal of Power Sources
Volume	385
DOIs	https://doi.org/10.1016/j.jpowsour.2018.01.009
State	Published - May 1 2018

Funding

The work at Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the U.S. Department of Energy (DOE) under contract DE-AC05-00OR22725 , was sponsored by the Office of Energy Efficiency and Renewable Energy (EERE) , Vehicle Technologies Office , Applied Battery Research . Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC ., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy's National Nuclear Security Administration (NNSA) under contract DE-NA0003525 . Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy's National Nuclear Security Administration (NNSA) under contract DE-NA0003525. The work at Argonne National Laboratory was supported by the U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (EERE) , Vehicle Technologies Office (VTO) . Argonne National Laboratory is operated for DOE Office of Science by UChicago Argonne, LLC , under contract number DE-AC02-06CH11357 .

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Battelle
Office of Science
Office of Energy Efficiency and Renewable Energy	DE-AC02-06CH11357
National Nuclear Security Administration	DE-NA0003525
Argonne National Laboratory
Oak Ridge National Laboratory
Sandia National Laboratories
Vehicle Technologies Office

Keywords

Anode
Lithium-ion battery
Microstructure
Overcharge
SEI
Scanning electron microscopy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2018.01.009

Cite this

Dietz Rago, N., Bareño, J., Li, J., Du, Z., Wood, D. L., Steele, L. A., Lamb, J., Spangler, S., Grosso, C., Fenton, K., & Bloom, I. (2018). Effect of overcharge on Li(Ni_0.5Mn_0.3Co_0.2)O₂/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode. Journal of Power Sources, 385, 148-155. https://doi.org/10.1016/j.jpowsour.2018.01.009

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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",

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. There was considerable spatial heterogeneity in the microstructures across each laminate with several regions displaying complex layered structures.",

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Dietz Rago, N, Bareño, J, Li, J, Du, Z, Wood, DL, Steele, LA, Lamb, J, Spangler, S, Grosso, C, Fenton, K & Bloom, I 2018, 'Effect of overcharge on Li(Ni_0.5Mn_0.3Co_0.2)O₂/Graphite lithium ion cells with poly(vinylidene fluoride) binder. I - Microstructural changes in the anode', Journal of Power Sources, vol. 385, pp. 148-155. https://doi.org/10.1016/j.jpowsour.2018.01.009

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AU - Dietz Rago, Nancy

AU - Bareño, Javier

AU - Li, Jianlin

AU - Du, Zhijia

AU - Wood, David L.

AU - Steele, Leigh Anna

AU - Lamb, Joshua

AU - Spangler, Scott

AU - Grosso, Christopher

AU - Fenton, Kyle

AU - Bloom, Ira

PY - 2018/5/1

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