Lithium-ion batteries are used in various devices from small electronic devices to electric vehicles because of its higher energy density than other secondary batteries. However, ignition of lithium-ion batteries is a critical issue in recent years. The ignition mechanism of lithium-ion batteries needs to be elucidated. In particular, it has been pointed out that electrolyte solvents of lithium-ion batteries could be a source of the ignition because they are flammable organic solvents. Although ignition and combustion characteristics of electrolyte solvents have been evaluated by test methods including the effects of phase change, few studies have focused on gas-phase reactions. In order to accurately model the ignition process of lithium-ion batteries, it is necessary to accurately understand combustion chemistry of the gas phase.

In this study, the ignition process of electrolyte solvents is investigated using a micro flow reactor with a controlled temperature profile and species measurements and chemical kinetic models of electrolyte solvents are validated and developed. This study also evaluates the relationship between molecular structures of electrolyte solvents and reactivity, and explores additives to inhibit reactivity.