Thermal Stability of Delithiated LiMn[sub 2]O[sub 4] with Electrolyte for Lithium-Ion Batteries

The thermal stabilities of delithiated powder and with electrolyte were investigated with thermogravimetric analysis and C80 calorimeter. The thermal stabilities of and its coexisting system with show a decreasing trend with the state of charge increasing. The thermodynamics and kinetic parameters were obtained and it was found that both the onset temperature and the activation energy of the system are much lower than that of alone, which reveals that the thermal stability of the coexisting system is much poorer than that of the single component.