A comparative study of the thermal stability of Li1−xCoO2 and Li3−xCrMnO5 in the presence of 1 M LiPF6 in 3:7 EC/DEC electrolyte using accelerating rate calorimetry

Thermal explosion hazards on 18650 lithium ion batteries with a VSP2 adiabatic calorimeter

“…The fitted lines were used to calculate the kinetic parameters of the thermal explosion for various Li-ion batteries. Our results agree with the values of E a and A of Li-ion coin cells that were found using ARC tests by MacNeil et al [4] and Argue et al [21].…”

“…Finally, We applied the simple analytical equation of selfheating by an exothermic reaction, which for an adiabatic temperature rise can be written as [4,6,9,21]:…”

“…. Ea and A were found to be 1.7 eV and 6.6 × 10 18 min −1 by MacNeil et al[4] and 1.64 eV and 1.4 × 10 18 min −1 by Argue et al[21], respectively.…”

Electrolytes and Interphases in Li-Ion Batteries and Beyond

“…The overall outcome is the complete combustion of the entire battery system, in which the cathode serves as the oxidant, while carbonate solvents, polymer binder, and separators serve as the fuels . Various investigations of thermal instability of state-of-the-art electrolytes have placed the blame on the reactivity of PF 6 – -anion with other electrolyte components , and electrode materials, especially lithiated graphite, − while the reactions between delithiated cathode materials with electrolyte components depend on both state-of-charge and the chemistries. − In general, the reactions of lithiated graphite with electrolytes or interphases occur at lower onset temperatures (80–120 °C), ,, while reactions between electrolytes and delithiated cathode generate most of the enthalpies responsible for the propagation of thermal runaway.…”