Thermal and Oxidative Behavior of Carbonate Based Electrolytes with Cathode Materials for Fire Safety of Lithium-Ion Batteries

Lithium-ion batteries are used in various applications such as electric vehicles (EVs) and electronics devices due to excellent energy storage capabilities and long life. During charging and discharging, electrolytes help transport lithium-ions. Organic components can burn at low temperatures, causing battery failure. Analyzing electrolyte oxidation under various oxidizing situations and cathode and solvent chemical stability is required. Carbonate mixture reaction chemistry has been studied using gas-phase experimental methods such as flow reactor (FR), shock tube (ST), and rapid compression machine (RCM) to clarify lithium-ion battery carbonate solvent reactive chemistry and flammability. MBMS and micro-GC analysis used thermal event species from oxidation of carbonate mixture. Several carbonate-based electrolytes are oxidized in this investigation for fire safety. Simple combustion studies with NCM 622 in low-temperature and atmospheric-pressure conditions examine carbonate-based electrolytes' breakdown and oxidation to understand lithium-ion battery fire risk. Heterogeneous electrolyte-cathode reactions cause most battery failures. This research enhances carbonate-based electrolytes' chemistry, cathode thermal stability, and lithium-ion battery fire safety.