METHOD FOR PREPARING SEI-LIKE FILM COMPONENT ADDITIVE AS WELL AS ELECTROLYTE SOLUTION, LITHIUM-ION BATTERY, BATTERY MODULE, BATTERY PACK AND POWERED DEVICE

• Main Authors: HUANG, Lei, HAN, Changlong, WU, Zeli, AI, Zhiyong
• Format: Patent
• Language: English; French; German
• Published: 10.07.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present application provides a method for preparing an SEI (solid electrolyte interphase)-like film component additive, and an electrolyte solution comprising the SEI-like film component additive prepared by the method. Compared with a conventional electrolyte solution (electrolyte solution without adding SEI-like film component additive), the electrolyte solution of the present application can prevent the loss of the effective ingredients caused by the dissolution of the SEI film on the negative electrode in the electrolyte solution during battery storage and use, and the electrolyte solution of the present application can also timely supplement the lost or damaged SEI film with effective ingredients, so that the damaged parts of the SEI film are quickly and timely supplemented, thereby significantly improving the undesirable situations such as decomposition of electrolyte solution, increased side reactions, large gas production, loss of active lithium and the like caused by SEI film damage, thus significantly improving the cycling performance and safety performance of the battery.