Lithium coating composition, negative pole piece, secondary battery, battery module, battery pack, power utilization device, method and application

• Main Authors: HU BOBING, XUE WENWEN, HE XIAONING, LIU CHENGYONG, HUANG XIAN
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a lithium coating composition which comprises lithium-containing metal and a polymer Poly chemically connected to the lithium surface of the lithium-containing metal, and the polymer Poly comprises a structure shown in a formula I; wherein Rf, independently at each occurrence, is a fluorine-substituted aliphatic group; x is independently H or an electron withdrawing group at each occurrence; z is independently O, S or NR11 at each occurrence; in the formula, R11 is H or C1-3 alkyl; * represents a site of a connecting end group; n is an integer greater than or equal to 10; at least one cyano group in the polymer Poly forms a chemical connection with lithium in the lithium-containing metal. # imgabs0 # 本申请公开了一种锂包覆组合物，其包括含锂金属和化学连接于含锂金属中的锂表面的聚合物Poly，该聚合物Poly包含式I所示结构；其中，Rf每次出现，独立地为氟取代的脂肪族基；X每次出现，独立地为H或吸电子基团；Z每次出现，独立地为O、S或NR11；其中，R11为H或C1-3烷基；*表示连接端基的位点；n为选自≥10的整数；聚合物Poly中的至少一个氰基与含锂金属中的锂形成化学连接。#imgabs0#