Non-aqueous high-temperature electrolyte and lithium ion secondary battery containing same

The invention relates to a non-aqueous high-temperature electrolyte additive. The structural formula of the additive is # imgabs0. The invention also relates to a non-aqueous high-temperature electrolyte containing the additive and a lithium ion secondary battery containing the non-aqueous high-temperature electrolyte. The electrolyte additive can form a layer of uniform passivation protective film on the surface of an electrode active material, so that the problem that the electrolyte in the high-voltage battery is easy to generate gas under high-temperature storage is effectively solved, and the storage performance, the cycle performance and the safety performance of the high-voltage battery are improved. 本发明涉及一种非水高温电解液添加剂，该添加剂的结构式为：#imgabs0#本发明还涉及一种含该添加剂的非水高温电解液及包含它的锂离子二次电池。该电解液添加剂能够在电极活性材料表面形成一层均匀的钝化保护膜，有效地改善高电压电池中电解液在高温储存下的易产气问题，提高高电压电池的存储性能、循环性能和安全性能。