Impedimetric Chemosensing of Volatile Organic Compounds Released from Li-Ion Batteries.
ACS Sens
; 7(2): 674-683, 2022 02 25.
Article
em En
| MEDLINE
| ID: mdl-35170958
ABSTRACT
Detection of toxic and flammable gases and volatile organic compounds (VOCs) released from Li-ion batteries during thermal runaway can generate an early warning. A submicron (â¼0.15 µm)-thick poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOTPSS) sensor film is coated on a platinum electrode through a facile aqueous dispersion. The resulting sensor reliably detected different volatile organic compounds (VOCs) released during the early stages of thermal runaway of lithium-ion batteries (LIBs) even at low concentrations. The single-electrode sensor utilizes impedance spectroscopy to measure ethyl methyl carbonate and methyl formate concentrations at 5, 15, and 30 ppm independently and in various combinations using ethanol as a reference. In contrast to DC resistance measurement, which provides a single parameter, impedance spectroscopy provides a wealth of information, including impedance and phase angle at multiple frequencies as well as fitted charge transfer resistance and constant-phase elements. Different analytes influence the measurement of different parameters to varying degrees, enabling distinction using a single sensing material. The response time for ethyl methyl carbonate was measured to be 6 s. Three principal components (PCs) preserve more than 95% of information and efficiently enable discrimination of different classes of analytes. Application of low-power PEDOTPSS-based gas sensors will facilitate cost-effective early detection of VOCs and provide early warning to battery management systems (BMS), potentially mitigating catastrophic thermal runaway events.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Compostos Orgânicos Voláteis
/
Lítio
Tipo de estudo:
Screening_studies
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article