Tangent plane coated lithium ion battery positive plate and preparation method thereof

The invention relates to a lithium ion battery positive plate, at least one side section of the lithium ion battery positive plate is coated with a polyurethane coating, and the thickness of the polyurethane coating is 90-210 microns. The polyurethane is sprayed on the tangent plane of the battery positive plate, so that the burr problem of the tangent plane of the positive plate is greatly reduced, and meanwhile, the powder falling problem of the tangent plane is reduced through the cohesiveness of the polyurethane, so that the percent of pass of the production and manufacturing process is improved, and the safety performance of the lithium ion battery is improved. 本发明涉及一种锂离子电池正极片，其至少一侧切面包覆有聚氨酯涂层，所述聚氨酯涂层的厚度为90-210微米。本发明通过在对电池正极片的切面进行喷涂聚氨酯，极大地降低了正极片切面的"毛刺"问题，同时通过聚氨酯的粘结性，减少了切面的掉粉问题，从而提高了生产制造过程的合格率以及提高了锂离子电池的安全性能。