Battery electrolyte additive, and electrolyte and lithium ion battery using additive

• Main Authors: MA GUOQIANG, DONG JINGBO, LIU HAIDAO, CHEN HUICHUANG, JIANG ZHIMIN, LI NAN, ZHANG HAIBING, SHEN MIN
• Format: Patent
• Language: Chinese; English
• Published: 07.07.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides an additive applied to a battery electrolyte, which has a structure as shown in the following (I), and a substituent group is shown in the specification. The invention also provides an electrolyte and a battery using the additive. The additive provided by the invention can effectively reduce the interface impedance and charge transfer impedance between graphite, silicon carbon and other negative electrode materials and an electrolyte, thereby effectively improving the cycle stability and rate capability of the negative electrode materials. 本发明提供了一种应用于电池电解液的添加剂，具有如下(I)所示结构，取代基见说明书。本发明还提供了使用此添加剂的电解液和电池。本发明提供的添加剂能够有效降低石墨和硅碳等负极材料与电解液之间的界面阻抗和电荷转移阻抗，进而有效提高这些负极材料的循环稳定性和倍率性能。