Diaz Daniel, Hahn David W
Department of Aerospace and Mechanical Engineering, College of Engineering, University of Arizona, Tucson, AZ, USA.
Appl Spectrosc. 2022 Aug;76(8):967-977. doi: 10.1177/00037028211055213. Epub 2021 Nov 3.
Laser-induced breakdown spectroscopy (LIBS) was used to characterize the ejecta released by lithium-ion (Li-ion) cells at thermal runaway conditions. Commercial AAA-size, rechargeable, 3.7 V, 350 mAh, Li-ion battery cells were heated in a N -atmosphere tubular chamber up to about 165 ℃ to induce thermal decomposition. Through measurements of the chamber internal temperature and LIBS emission intensities over, time the onset temperature of thermal runaway (≈143 ℃) and the duration of the cells outgassing (>40 minutes) were determined. Relatively high-intensity atomic emissions from C, F, H, Li, Na, and P were detected at different times during the heating experiments. The detection of analytes such as C and H was continuous over time. On the contrary, detection of F, Li, Na, and P was more irregular, indicating the presence of solid-phase analytes or analyte-bearing particles. A calibration scheme for estimation of the total mass/volume concentration of all carbon-based species sampled within the laser-induced plasma was developed.
激光诱导击穿光谱法（LIBS）用于表征锂离子（Li-ion）电池在热失控条件下释放的喷射物。将商用AAA尺寸、可充电、3.7V、350mAh的锂离子电池在氮气气氛的管状腔室中加热至约165℃，以引发热分解。通过测量腔室内温度和LIBS发射强度随时间的变化，确定了热失控的起始温度（≈143℃）和电池排气持续时间（>40分钟）。在加热实验的不同时间检测到来自碳、氟、氢、锂、钠和磷的相对高强度的原子发射。碳和氢等分析物的检测随时间持续进行。相反，氟、锂、钠和磷的检测则更不规则，表明存在固相分析物或含分析物的颗粒。开发了一种校准方案，用于估计激光诱导等离子体内采样的所有碳基物种的总质量/体积浓度。
