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Thermal Stability and the Effect of Water on Hydrogen Fluoride Generation in Lithium-Ion Battery Electrolytes Containing LiPF6oa mark
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Publication Year
2022-07-01
Journal
Batteries
Publisher
MDPI
Citation
Batteries, Vol.8 No.7
Keyword
HF generation temperatureLiPF6 saltlithium-ion battery electrolytesTG/DTA-MS analysisthermal stability
Mesh Keyword
Battery electrolyteEffect of waterElectrochemical energy storage devicesExposed toGeneration temperatureHydrogen fluorideHydrogen fluoride generation temperatureLiPF6 saltLithium-ion battery electrolyteTG/DTA-MS analyse
All Science Classification Codes (ASJC)
Energy Engineering and Power TechnologyElectrochemistryElectrical and Electronic Engineering
Abstract
Lithium-ion batteries (LIBs) have been used as electrochemical energy storage devices in various fields, ranging from mobile phones to electric vehicles. LIBs are composed of a positive electrode, a negative electrode, an electrolyte, and a binder. Among them, electrolytes consist of organic solvents and lithium ion conducting salts. The electrolytes used in LIBs are mostly linear and cyclic alkyl carbonates. These electrolytes are usually based on their combinations to allow the use of Li as the anodic active component, resulting in the high power and energy density of batteries. However, these organic electrolytes have high volatility and flammability that pose a serious safety issue when exposed to extreme conditions such as elevated temperatures. At that time, these electrolytes can react with active electrode materials and release a considerable amount of heat and gas. In this study, a simultaneous thermal analysis-mass spectrometry analysis was performed on six different organic solvents to examine the effect of water on hydrogen fluoride (HF) generation temperature in the electrolyte of a LIB. The electrolytes used in the experiment were anhydrous diethyl carbonate, 1,2-dimethoxyethane, ethylene carbonate, 1,3-dioxolane, tetrahydrofurfuryl alcohol, and 2-methyl-tetrahydrofuran, each containing LiPF6. The HF formation temperature was observed and compared with that when water entered the electrolyte exposed to high-temperature conditions such as fire.
ISSN
2313-0105
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/32792
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85133512881&origin=inward
DOI
https://doi.org/10.3390/batteries8070061
Journal URL
https://www.mdpi.com/2313-0105/8/7/61/pdf?version=1656413268
Type
Article
Funding
Acknowledgments: This work was supported by Korea Environment Industry & Technology Institute (KEITI) through Advanced Technology Development Project for Predicting and Preventing Chemical accidents Program, funded by Korea Ministry of Environment (MOE) (2022003620003).
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Jung, Seungho  Image
Jung, Seungho 정승호
Department of Environmental and Safety Engineering
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