In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2019-01, No. 6 ( 2019-05-01), p. 599-599
Abstract:
Lithium-ion batteries have become the leading energy storage technology for automotive applications. During operation, a passivating or solid electrolyte interphase (SEI) layer forms on both electrodes. The structure and composition of the SEI layers at the electrode surfaces are complex under normal operating conditions [1-4]. However, there are very few reports in the literature that describe how the SEI changes under abusive conditions, such as overcharge. Understanding these changes is potentially very useful from a safety viewpoint since it might help us create robust cells that are tolerant of overcharge. Argonne, Oak Ridge and Sandia National Laboratories collaborated to understand the physical and chemical changes that occur in small pouch cells that were charged to 100, 120, 140, 160, 180 and ~250% SOC. The SEI layer on the graphite anode surface was characterized using scanning-electron microscopy, X-ray photoelectron spectroscopy, chemical analysis and high-performance liquid chromatography. We found that the structure and chemistry of the SEI layer was sensitive to the extent of overcharge, the binder in the cathode, and the nature of the cathode. These and other findings will be discussed. References Peled, J. Electrochem. Soc., 126 (1979) 2047. G. Thevenin and R.H. Muller, J. Electrochem. Soc., 134 (1987) 273. J. An, J. Li, C. Daniel, D. Mohanty, S. Nagpure, and D.L. Wood, Carbon, 105 (2016) 52–76. Aurbach, I. Weissman, A. Zaban, and O. Chuzid (Youngman), Electrochim Acta, 39 (1994) 51. We gratefully acknowledge support from the U. S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office. Argonne National Laboratory is operated for DOE Office of Science by UChicago Argonne, LLC, under contract number DE-AC02-06CH11357. The work at Oak Ridge National Laboratory was sponsored by U. S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office, Applied Battery Research. Oak Ridge National Laboratory is managed by UT Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725. 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 U.S. government retains for itself, and others acting on its behalf, a paid-up nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the government.
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2019-01/6/599
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2019
detail.hit.zdb_id:
2438749-6
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