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Title: Fluoroethylene Carbonate and Vinylene Carbonate Reduction: Understanding Lithium-Ion Battery Electrolyte Additives and Solid Electrolyte Interphase Formation

Journal Article · · Chemistry of Materials

In this work, we have synthesized the products of fluoroethylene carbonate (FEC) and vinylene carbonate (VC) via lithium naphthalenide reduction. By analyzing the resulting solid precipitates and gas evolution, our results confirm that both FEC and VC decomposition products include HCO2Li, Li2C2O4, Li2CO3, and polymerized VC. For FEC, our experimental data supports a reduction mechanism where FEC reduces to form VC and LiF, followed by subsequent VC reduction. In the FEC reduction product, HCO2Li, Li2C2O4, and Li2CO3 were found in smaller quantities than in the VC reduction product, with no additional fluorine environments being detected by solid-state nuclear magnetic resonance or X-ray photoelectron spectroscopy analysis. With these additives being practically used in higher (FEC) and lower (VC) concentrations in the base electrolytes of lithium-ion batteries, our results suggest that the different relative ratios of the inorganic and organic reduction products formed by their decomposition may be relevant to the chemical composition and morphology of the solid electrolyte interphase formed in their presence.

Research Organization:
Brown Univ., Providence, RI (United States); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; Schiff Foundation; Weizmann Institute of Science
Grant/Contract Number:
SC0007074; AC02-05CH11231; 7057154
OSTI ID:
1534438
Journal Information:
Chemistry of Materials, Vol. 28, Issue 22; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 262 works
Citation information provided by
Web of Science

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Polymers Based on Cyclic Carbonates as Trait d'Union Between Polymer Chemistry and Sustainable CO 2 Utilization journal February 2019
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1,2,6-Oxadithiane 2,2,6,6-tetraoxide as an Advanced Electrolyte Additive for Li[Ni 0.5 Mn 0.3 Co 0.2 ]O 2 /Graphite Pouch Cells journal January 2019
Interphases, Interfaces, and Surfaces of Active Materials in Rechargeable Batteries and Perovskite Solar Cells journal January 2020
A dual-salt coupled fluoroethylene carbonate succinonitrile-based electrolyte enables Li-metal batteries journal January 2020
Communication—Quantitative Analysis of Consumption of Fluoroethylene Carbonate Additives on Silicon Alloy Anodes journal January 2018
Interrelation between Redox Molecule Transport and Li + Ion Transport across a Model Solid Electrolyte Interphase Grown on a Glassy Carbon Electrode journal January 2017
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Figures / Tables (8)