Electrolyte additive, electrolyte, battery and electric device

• Main Authors: SONG XIAOYI, RAO TING, YANG HAIDONG, HU HUIJUAN, XIE TIAN
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses an electrolyte additive, an electrolyte, a battery and a power utilization device.The electrolyte additive comprises a first additive, a second additive and a third additive, the structural formula of the first additive is shown in the formula I, the second additive comprises a sultone compound, and the third additive is shown in the formula II; the structural formula of the third additive is as shown in formula II # imgabs0 #, R1, R2, R3 and R4 independently comprise alkyl groups or alkenyl groups, and M comprises alkyl groups with 2-10 carbon atoms or alkyl groups with O = C = N-substituted 2-10 carbon atoms. Therefore, when the electrolyte additive is added into the lithium ion battery, the gas production of the battery can be reduced, the high-temperature cycle performance and the high-temperature storage performance of the battery can be improved, and the impedance of the battery can be reduced. 本申请公开了一种电解液添加剂、电解液、电池和用电装置，其中所述电解液添加剂包括第一添加剂、第二添加剂和第三添加剂，所述第一添加剂的结构式如式Ⅰ所示，所述第二添加剂包括磺酸内