Safety is the key-feature of large-size lithium-ion batteries and thermal stability of the electrolytes is crucial. We investigated the thermal and flammability properties of mixed electrolytes based on the conventional ethylencarbonate-dimethylcarbonate (1:1 wt/wt) - 1M LiPF6 and the hydrophobic ionic liquid N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr14TFSI). The results of thermogravimetric analyses and flammability tests of mixed electrolytes of different composition are reported and discussed. An important finding is that though the mixtures with high contents of ionic liquid are more difficult to ignite, they burn for a longer time, once they are ignited.
C. Arbizzani, G. Gabrielli, M. Mastragostino (2011). Thermal stability and flammability of electrolytes for lithium-ion batteries. JOURNAL OF POWER SOURCES, 196, 4801-4805 [10.1016/j.jpowsour.2011.01.068].
Thermal stability and flammability of electrolytes for lithium-ion batteries
ARBIZZANI, CATIA;MASTRAGOSTINO, MARINA
2011
Abstract
Safety is the key-feature of large-size lithium-ion batteries and thermal stability of the electrolytes is crucial. We investigated the thermal and flammability properties of mixed electrolytes based on the conventional ethylencarbonate-dimethylcarbonate (1:1 wt/wt) - 1M LiPF6 and the hydrophobic ionic liquid N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr14TFSI). The results of thermogravimetric analyses and flammability tests of mixed electrolytes of different composition are reported and discussed. An important finding is that though the mixtures with high contents of ionic liquid are more difficult to ignite, they burn for a longer time, once they are ignited.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
