This title appears in the Scientific Report :
2019
Please use the identifier:
http://dx.doi.org/10.1016/j.jpowsour.2019.04.113 in citations.
Improving the graphite/electrolyte interface in lithium-ion battery for fast charging and low temperature operation: Fluorosulfonyl isocyanate as electrolyte additive
Improving the graphite/electrolyte interface in lithium-ion battery for fast charging and low temperature operation: Fluorosulfonyl isocyanate as electrolyte additive
Nowadays, the demand for high energy density, fast-charging and wide-temperature range lithium-ion batteries has increased significantly. The Solid Electrolyte Interphase (SEI) protecting layer, formed at the interface between the graphite anode and the electrolyte is a key parameter for fast kineti...
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Personal Name(s): | Shi, Junli (Corresponding author) |
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Ehteshami, Niloofar / Ma, Jialing / Zhang, Hui / Liu, Haidong / Zhang, Xin (Corresponding author) / Li, Jie / Paillard, Elie (Corresponding author) | |
Contributing Institute: |
Helmholtz-Institut Münster Ionenleiter für Energiespeicher; IEK-12 |
Published in: | Journal of power sources, 429 (2019) S. 67 - 74 |
Imprint: |
New York, NY [u.a.]
Elsevier
2019
|
DOI: |
10.1016/j.jpowsour.2019.04.113 |
Document Type: |
Journal Article |
Research Program: |
Electrochemical Storage |
Publikationsportal JuSER |
Nowadays, the demand for high energy density, fast-charging and wide-temperature range lithium-ion batteries has increased significantly. The Solid Electrolyte Interphase (SEI) protecting layer, formed at the interface between the graphite anode and the electrolyte is a key parameter for fast kinetics and wide temperature operation, especially to enable fast charge of cells including graphite anodes. In this work, fluorosulfonyl isocyanate (FI) is used as a novel SEI film forming electrolyte additive for graphite anode. Due to its high reduction potential (above 2.8 V vs. Li+/Li), FI is reduced prior to the carbonate-based electrolyte, yielding a conductive SEI on the surface of the graphite. The SEI is made of a thick and protective inorganic inner layer that prevents the growth of the outer organic layer. As a result, the resistance of the graphite/electrolyte interface is dramatically decreased. Therefore, Li/graphite cells with 2 wt% FI exhibit excellent rate performance at room temperature (20 °C) and low temperature (0 °C and −20 °C), compared to those with the reference liquid electrolyte (LP30). |