Preparation method of pre-lithium positive plate, and formation method and capacity grading method of pre-lithium battery

• Main Authors: LI LANXIN, LU YI, ZHOU XUANMING, YANG WEI, REN DAWEI, SHA ZONGJIAN, MIAO YONGHUA
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a preparation method of a pre-lithium positive plate, and a formation method and a capacity grading method of a pre-lithium battery. The preparation method of the pre-lithiated positive plate comprises the following steps: preparing positive slurry: uniformly mixing a conductive agent, a binder and a solvent, adding a lithium supplement agent, continuously mixing to obtain transition slurry, uniformly mixing, adding main powder into the transition slurry, and uniformly mixing to obtain the positive slurry; and manufacturing a pole piece: fully stirring and dispersing the positive electrode slurry, uniformly coating the surface of a current collector with the positive electrode slurry, and drying and rolling to obtain the pre-lithiated positive electrode piece. 本申请提供预锂正极片的制备方法、预锂电池的化成方法及分容方法。预锂正极片的制备方法，包括如下步骤：正极浆料配置：先将导电剂、粘结剂和溶剂混合均匀，再加入补锂剂继续混合获得过渡浆料，混合均匀后再在所述过渡浆料中加入主粉，混合均匀得到正极浆料；极片制作：将所述正极浆料充分搅拌分散后，均匀涂布在集流体表面，经烘干、辊轧后得到预锂正极片。