Electrolyte containing high-voltage high-temperature additive composition and lithium ion battery

The invention discloses an electrolyte of a high-voltage high-temperature additive composition, the electrolyte comprises a main lithium salt, an organic solvent and an additive, the additive comprises a first additive selected from a structure as shown in a formula (I-1) and/or a structure as shown in a formula (I-2) and a second additive selected from at least one of structures as shown in a formula (II-1), a structure as shown in a formula (II-2) or a structure as shown in a formula (II-3), and the structural formula of the additive is shown in the specification. The electrolyte provided by the invention is used for a high-voltage battery system, has excellent high-temperature cycle performance and high-temperature storage performance, also has relatively low internal resistance of a battery cell, and can inhibit moisture and acidity in the electrolyte. 本发明公开了一种高电压高温型添加剂组合物的电解液，包括主锂盐、有机溶剂和添加剂，所述添加剂包括：选自式(I-1)和/或式(I-2)所示的结构的第一添加剂，选自式(II-1)、(II-2)或(II-3)所示结构中的至少一种的第二添加剂，添加剂的结构式见说明书。本发明提供的电解液用于高电压电池体系，具有优异高温循