Lithium battery separator

• Main Authors: SHAN HUAJING, CHENG YUE, HU JUN, CHEN YONGLE, QIU CHANGQUAN, YU SHAOBO
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a lithium battery separator which comprises a modified porous base membrane and a functional layer arranged on at least one surface of the modified porous base membrane. The modified porous base membrane comprises a base membrane body and a lithium-conducting ionic compound particle layer, at least one surface of the base membrane body is modified through corona pretreatment, and the lithium-conducting ionic compound particle layer is arranged on the at least one surface, modified through corona pretreatment, of the base membrane body. The functional layer contains organic matters and is arranged on the lithium-conducting ionic compound particle layer. The invention also discloses a lithium-conducting ion containing compound prepared by a sol-gel-hydrothermal method, and small-particle-size particles of the lithium-conducting ion containing compound are embedded on the modified surface of the base membrane body, so that the defects of poor ionic conductivity and poor wettability of the