Good news! Presumably, we will find out whether it works in practice!
From personal experience, I would say the event is not so rare as claimed:
"There were at least 20 fires or explosions of lithium-ion batteries in electric vehicles worldwide in 2021, according to the authors. Though electric vehicle battery explosions are a risk, they are rare."
"... Ethylene carbonate (EC) is a key component of a battery’s electrolyte. The new sensor detects trace amounts of EC, flagging potential battery failures before they become disasters.
The highly sensitive and cost-effective gas sensor was developed using molecular structures called covalent organic frameworks (COFs). These can be engineered to selectively detect different gas molecules. ..."
From the abstract:
"This study presents a computationally guided approach for selecting covalent organic frameworks (COFs) for the selective detection of the trace ethylene carbonate (EC) vapor, a key indicator of electrolyte leakage from lithium-ion batteries (LIBs). High-throughput screening, employing grand canonical Monte Carlo (GCMC) simulation complemented by density functional theory (DFT) calculations, was used to identify potential COF candidates from the CURATED COF database.
Among the screened materials, an imine COF functionalized with quaternary ammonium (QA) groups, named COF-QA-4, exhibited a high adsorption capacity (5.88 mmol/g) and selectivity of EC vapor. DFT analysis revealed strong molecular interactions driven by a partial charge transfer mechanism between EC and the COF-QA-4 framework, underpinning its superior adsorption properties. Experimental validation through chemiresistive gas sensors fabricated with COF-QA-4 demonstrated excellent sensitivity and reversibility to 1.15 ppmv of EC vapor, maintaining consistent performance over three response–recovery cycles. This work highlights the potential of computationally guided material discovery for advancing sensor technologies in LIB safety monitoring."
Graphical abstract:
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