ADDITIVE FOR ELECTROLYTE SOLUTION OF NONAQUEOUS ELECTROLYTE BATTERY, NONAQUEOUS ELECTROLYTE SOLUTION FOR BATTERY AND NONAQUEOUS ELECTROLYTE BATTERY

摘要

Disclosed is an additive for electrolyte solutions of nonaqueous electrolyte batteries which enables to raise the thermal runaway temperature of a nonaqueous electrolyte battery by a greater degree than the conventional additives for electrolyte solutions. Specifically disclosed is an additive for electrolyte solutions of nonaqueous electrolyte batteries which is composed of a phosphazene compound represented by the following formula (I): (NPX