High-voltage lithium ion battery electrolyte and lithium ion battery

The invention relates to the field of electrolytes, and provides a high-voltage lithium ion battery and an electrolyte, the electrolyte comprises a non-aqueous solvent, a lithium salt and an additive, and the additive comprises 1, 4-benzene bis (trimethylsilane) borate. By adding the 1, 4-benzene bis (trimethylsilane) boric acid ester into the electrolyte, the high-temperature cycle and high-temperature storage performance of the battery are remarkably improved. 本发明涉及电解液领域，本发明提供了一种高电压锂离子电池及电解液，所述电解液中包括非水溶剂、锂盐和添加剂，添加剂包括1,4-苯二(三甲基硅烷)硼酸酯。通过在电解液中加入1,4-苯二(三甲基硅烷)硼酸酯显著地提高了电池的高温循环和高温存储性能。