| Title: | Impedimetric Chemosensing of Volatile Organic Compounds Released from Li-Ion Batteries |
| Author(s): | Kaur P; Bagchi S; Gribble D; Pol VG; Bhondekar AP; |
| Address: | "Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India. CSIR-Central Scientific Instruments Organization, Sector 30-C, Chandigarh 160030, India" |
| DOI: | 10.1021/acssensors.2c00113 |
| ISSN/ISBN: | 2379-3694 (Electronic) 2379-3694 (Linking) |
| 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 ( approximately 0.15 mum)-thick poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) 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 PEDOT:PSS-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" |
| Keywords: | Electric Power Supplies Electrodes Gases/chemistry Ions *Lithium *Volatile Organic Compounds/chemistry battery safety conducting polymer gas sensor impedance spectroscopy thermal runaway volatile organic compounds; |
| Notes: | "MedlineKaur, Palwinder Bagchi, Sudeshna Gribble, Daniel Pol, Vilas G Bhondekar, Amol P eng Research Support, Non-U.S. Gov't 2022/02/17 ACS Sens. 2022 Feb 25; 7(2):674-683. doi: 10.1021/acssensors.2c00113. Epub 2022 Feb 16" |
