Abstract
Flame extinction limit of Ethyl Methyl Carbonate (EMC) often used for Li-ion Batteries has been measured when Trimethyl Phosphate (TMP) is added to EMC. The wick flame was used to determine the extinction limit in terms of oxygen concentration. The results showed that extinction limit much increased when the first 5wt% TMP was added to EMC. The change of extinction limit, when another 5wt% TMP was added, was not so large, while the increasing trend was kept. On the other hand, addition of TMP caused increase in flame temperature. From these results, it was suggested that chemical effect, capturing of H and OH radicals by TMP and organophosphorus compounds, is more important than promotion effect with the flame temperature increase.
