Journal article
Operando Acoustic Monitoring of SEI Formation and Long-Term Cycling in NMC/SiGr Composite Pouch Cells
Journal of the Electrochemical Society, v 167(2), 020517
21 Jan 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Stable long-term cycling and solid-electrolyte-interphase (SEI) formation are key challenges in the design of Si/graphite composites as Li-ion battery (LIB) anode materials. Typically, these long-term cycling properties are examined in flooded half-cell settings making use of a Li-metal counter electrode and a Si/graphite working electrode. This form factor has the advantage of offering an unlimited supply of Li-ions and electrolyte, thus isolating performance degradation to the passivation of the working electrode. However, half-cell studies are ineffective in revealing performance and degradation mechanisms of the Si/graphite composite in a more commercially realistic full cell setting. This paper outlines an operando acoustic technique that can offer insights on SEI formation and capacity degradation of Si/graphite composites in a full cell setting. Through a combination of electrochemical and chemical analyses, we show that increasing passivation of the silicon particles in the Si/graphite composite anode is correlated with an increase in the acoustic time-of-flight shift. We further show that temporary loss of the acoustic signal during the first cycle is associated with significant gassing of the cell. The operando acoustic technique outlined here is low-cost, simple to setup and has the potential for localized resolution, indicating usefulness in commercial-scale Si/graphite cell quality control and diagnosis. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
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Details
- Title
- Operando Acoustic Monitoring of SEI Formation and Long-Term Cycling in NMC/SiGr Composite Pouch Cells
- Creators
- Clement Bommier - Columbia UniversityWesley Chang - Columbia UniversityJianlin Li - Oak Ridge National LaboratoryShaurjo Biswas - Princeton UniversityGreg Davies - Princeton UniversityJagjit Nanda - Oak Ridge National LaboratoryDaniel Steingart - Princeton University
- Publication Details
- Journal of the Electrochemical Society, v 167(2), 020517
- Publisher
- Electrochemical Soc Inc
- Number of pages
- 10
- Grant note
- Office of Energy Efficiency and Renewable Energy (EERE) Vehicle Technologies Office (VTO); United States Department of Energy (DOE) DMR-1420541 / National Science Foundation (NSF)-MRSEC program; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) Princeton Center for Complex Materials DE-AC05-00OR22725 / U.S. Department of Energy (DOE); United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000517804400001
- Scopus ID
- 2-s2.0-85081691819
- Other Identifier
- 991021889975404721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films