▎ 摘　　要

NOVELTY - Low-temperature electrolyte comprises lithium salt, an organic solvent and an additive, where the lithium salt is 15-20 wt.% lithium hexafluorophosphate, the organic solvent includes 30-40 wt.% polypropylene, 10-20 wt.% vinyl carbonate, 5-15 wt.% polycarbonate, 20-30 wt.% ethylene propylene rubber and the additive includes 5-15 wt.% fluoroethylene carbonate, 2-10 wt.% polystyrene, 0.5-5 wt.% ammonium dinitramide, 0.5-3 wt.% monobutyl glycol ether, 0.5-2 wt.% 1,3, 6-hexanetrinitrile, 0.1-1 wt.% vinylene carbonate, and 0.5 wt.% 2,2'-dithiobis(pyridine-1-oxide). USE - The electrolyte is useful for lithium-ion battery with high energy density and high voltage (claimed). ADVANTAGE - The electrolyte ensures the stability of the high-temperature performance of the lithium-ion battery high-voltage system and excellent charging performance under low-temperature conditions, and the lithium-ion battery charged normally under low temperature conditions, widens the low-temperature charging window of the high-voltage lithium-ion battery of the 4.45V system. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a lithium-ion battery with high energy density and high voltage.