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Lithium-ion battery electrolyte emissions analyzed by coupled thermogravimetric/Fourier-transform infrared spectroscopy
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Säkerhet och transport, Elektronik. Chalmers University of Technology, Sweden.ORCID-id: 0000-0001-5364-449x
University of Gothenburg, Sweden.
University of Gothenburg, Sweden.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 365, s. 446-455Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In the last few years the use of Li-ion batteries has increased rapidly, powering small as well as large applications, from electronic devices to power storage facilities. The Li-ion battery has, however, several safety issues regarding occasional overheating and subsequent thermal runaway. During such episodes, gas emissions from the electrolyte are of special concern because of their toxicity, flammability and the risk for gas explosion. In this work, the emissions from heated typical electrolyte components as well as from commonly used electrolytes are characterized using FT-IR spectroscopy and FT-IR coupled with thermogravimetric (TG) analysis, when heating up to 650 °C. The study includes the solvents EC, PC, DEC, DMC and EA in various single, binary and ternary mixtures with and without the LiPF6 salt, a commercially available electrolyte, (LP71), containing EC, DEC, DMC and LiPF6 as well as extracted electrolyte from a commercial 6.8 Ah Li-ion cell. Upon thermal heating, emissions of organic compounds and of the toxic decomposition products hydrogen fluoride (HF) and phosphoryl fluoride (POF3) were detected. The electrolyte and its components have also been extensively analyzed by means of infrared spectroscopy for identification purposes.

sted, utgiver, år, opplag, sider
2017. Vol. 365, s. 446-455
Emneord [en]
Electrolyte, Hydrogen fluoride, Lithium-ion, Organic carbonates, Phosphoryl fluoride, TG/FT-IR
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-32416DOI: 10.1016/j.jpowsour.2017.08.082Scopus ID: 2-s2.0-85029156776OAI: oai:DiVA.org:ri-32416DiVA, id: diva2:1153849
Merknad

 Funding details: Carl Tryggers Stiftelse för Vetenskaplig Forskning;

Funding details: Energimyndigheten

Tilgjengelig fra: 2017-10-31 Laget: 2017-10-31 Sist oppdatert: 2018-08-23bibliografisk kontrollert

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