Pre-lithiation method and application of positive plate of lithium ion battery

• Main Authors: XIE QIANGSHENG, CHEN YU, TANG MING, WANG CHAO, LI YUANYUAN, LIU CHAOHUI, WANG XUEYOU
• Format: Patent
• Language: Chinese; English
• Published: 16.01.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a pre-lithiation method and application of a lithium ion battery positive plate. The pre-lithiation method provided by the invention comprises the following steps: soaking a positive plate in a pre-lithiation reagent, cleaning and drying; the pre-lithiation reagent is an azobenzene lithium reagent. According to the method provided by the invention, pre-lithiation is uniform, the pre-lithiation degree is controllable, the problems that the rate is too high, the controllability is poor and excessive pre-lithiation is easy to occur in the chemical pre-lithiation process of the positive plate are solved, the first irreversible capacity loss of the battery can be compensated, the first coulombic efficiency and the energy density of the battery are improved, and the cycle life of the battery is prolonged. Moreover, the method is safe and simple to operate, and is easy for large-scale mass production. 本发明公开了一种锂离子电池正极片的预锂化方法及应用。本发明提供的预锂化方法，包括如下步骤：将正极片浸泡在预锂化试剂中，清洗，干燥；所述预锂化试剂为偶氮苯锂类试剂。本发明提供的方法预锂化