Thermal stability and flammability of electrolytes for lithium-ion batteries

► Study on thermal and flammability properties of EC-DMC-LiPF6 and Pyr14TFSI mixtures. ► Pyr14TFSI acts as a flame retardant in mixtures with organic electrolytes. ► Mixtures with Pyr14TFSI, once ignited, burn for a longer time than pure EC-DMC-LiPF6.