Detection of liquid electrolyte leakage from Li-ion batteries by signalling the presence of Li ions
Feasibility study for the use of 8-Hydroxyquinoline
The present report describes the work aimed at developing an improved method for verifying the occurrence of electrolyte leakage from Li-ion batteries in support of the currently ongoing work on the UNECE Global Technical Regulation on Electric Vehicle Safety (GTR 20).
Detection of Li ions' presence was attempted by exploiting the ability of 8-hydroxyquinoline to chelate Li ions forming a fluorescent chelate. However, it is shown that 8-hydroxyquinoline is not a selective ligand and forms fluorescent chelates with a number of other metal cations, whose presence in Li-ion battery packs, and hence interference, can be expected. For this reason, a selective Li-ion fluoro- or chromophore compound needs to be identified. Other potential interferents identified include water and fluorescent and colouring agents used in liquid coolants for battery thermal management. Review of the published literature in search of such a Li-ion selective ligand showed that various compounds had been previously developed, however for different applications. Their suitability for the intended purpose of this investigation remains to be evaluated.
KARAISKAKIS Georgios;
DA COSTA BARATA Ricardo;
LEBEDEVA Natalia;
2023-06-16
Publications Office of the European Union
JRC133056
978-92-68-04215-1 (online),
1831-9424 (online),
EUR 31546 EN,
OP KJ-NA-31-546-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC133056,
10.2760/147384 (online),
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