Study of the corrosion behavior of LiFSI based electrolyte for Li-ion cells

Xianyang Wu; Zhijia Du

doi:10.1016/j.elecom.2021.107088

Study of the corrosion behavior of LiFSI based electrolyte for Li-ion cells

Xianyang Wu, Zhijia Du

Emerging and Solid-State Batteries

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

43 Scopus citations

Abstract

The corrosion/passivation phenomenon of Al and stainless steel with 1.25 M LiFSI in ethylene carbonate / ethyl methyl carbonate 30/70 wt% electrolyte was studied in coin cell and pouch cell settings. Our results showed that the LiFSI electrolyte can passivate Al foil in the normal cell operation voltage window 2.8 to 4.3 V. In contrast, no passivation behavior was observed for stainless steel with ever growing current response in cyclic voltammetry test. Corrosion produced Fe/Cr ions were detected on the anode side, which accelerated the electrolyte decomposition reaction. The LiFSI electrolyte was tested in 1.5 Ah pouch cell for long term cycling performance and fast charging capabilities. The capacity retentions after 1000 cycles were 88.5% and 80% for ± 1C and extreme fast charging rates, which demonstrated the suitability of using LiFSI in Li-ion cells without stainless steel components.

Original language	English
Article number	107088
Journal	Electrochemistry Communications
Volume	129
DOIs	https://doi.org/10.1016/j.elecom.2021.107088
State	Published - Aug 2021

Funding

This research 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 (VTO) (Technology Manager: Brian Cunningham).

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory
UT-Battelle

Keywords

Corrosion
Extreme fast charing
LiFSI
Stainless steel

UN SDGs

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

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10.1016/j.elecom.2021.107088

Cite this

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title = "Study of the corrosion behavior of LiFSI based electrolyte for Li-ion cells",

abstract = "The corrosion/passivation phenomenon of Al and stainless steel with 1.25 M LiFSI in ethylene carbonate / ethyl methyl carbonate 30/70 wt% electrolyte was studied in coin cell and pouch cell settings. Our results showed that the LiFSI electrolyte can passivate Al foil in the normal cell operation voltage window 2.8 to 4.3 V. In contrast, no passivation behavior was observed for stainless steel with ever growing current response in cyclic voltammetry test. Corrosion produced Fe/Cr ions were detected on the anode side, which accelerated the electrolyte decomposition reaction. The LiFSI electrolyte was tested in 1.5 Ah pouch cell for long term cycling performance and fast charging capabilities. The capacity retentions after 1000 cycles were 88.5% and 80% for ± 1C and extreme fast charging rates, which demonstrated the suitability of using LiFSI in Li-ion cells without stainless steel components.",

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author = "Xianyang Wu and Zhijia Du",

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doi = "10.1016/j.elecom.2021.107088",

language = "English",

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journal = "Electrochemistry Communications",

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T1 - Study of the corrosion behavior of LiFSI based electrolyte for Li-ion cells

AU - Wu, Xianyang

AU - Du, Zhijia

PY - 2021/8

Y1 - 2021/8

N2 - The corrosion/passivation phenomenon of Al and stainless steel with 1.25 M LiFSI in ethylene carbonate / ethyl methyl carbonate 30/70 wt% electrolyte was studied in coin cell and pouch cell settings. Our results showed that the LiFSI electrolyte can passivate Al foil in the normal cell operation voltage window 2.8 to 4.3 V. In contrast, no passivation behavior was observed for stainless steel with ever growing current response in cyclic voltammetry test. Corrosion produced Fe/Cr ions were detected on the anode side, which accelerated the electrolyte decomposition reaction. The LiFSI electrolyte was tested in 1.5 Ah pouch cell for long term cycling performance and fast charging capabilities. The capacity retentions after 1000 cycles were 88.5% and 80% for ± 1C and extreme fast charging rates, which demonstrated the suitability of using LiFSI in Li-ion cells without stainless steel components.

AB - The corrosion/passivation phenomenon of Al and stainless steel with 1.25 M LiFSI in ethylene carbonate / ethyl methyl carbonate 30/70 wt% electrolyte was studied in coin cell and pouch cell settings. Our results showed that the LiFSI electrolyte can passivate Al foil in the normal cell operation voltage window 2.8 to 4.3 V. In contrast, no passivation behavior was observed for stainless steel with ever growing current response in cyclic voltammetry test. Corrosion produced Fe/Cr ions were detected on the anode side, which accelerated the electrolyte decomposition reaction. The LiFSI electrolyte was tested in 1.5 Ah pouch cell for long term cycling performance and fast charging capabilities. The capacity retentions after 1000 cycles were 88.5% and 80% for ± 1C and extreme fast charging rates, which demonstrated the suitability of using LiFSI in Li-ion cells without stainless steel components.

KW - Corrosion

KW - Extreme fast charing

KW - LiFSI

KW - Stainless steel

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DO - 10.1016/j.elecom.2021.107088

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JO - Electrochemistry Communications

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Study of the corrosion behavior of LiFSI based electrolyte for Li-ion cells

Abstract

Funding

Keywords

UN SDGs

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