Negative electrode slurry additive, negative electrode slurry, preparation method of negative electrode slurry, negative electrode plate and lithium ion battery

The invention belongs to the field of lithium ion batteries, and particularly relates to a negative electrode slurry additive, negative electrode slurry, a preparation method, a negative electrode plate and a lithium ion battery. And the negative electrode slurry additive can be complexed with a carboxymethyl functional group on a CMC molecular chain. The negative electrode slurry additive provided by the invention can effectively adjust the viscosity of the lithium ion battery negative electrode slurry (the maximum reduction amplitude of the slurry viscosity is about 55%), so that the uniformity and stability of the slurry are improved, in addition, the use amount of the negative electrode slurry prepared by the additive is low, the battery cost can be ensured to be relatively low, and the application prospect is wide. And meanwhile, the influence of introduced metal ions and anion impurities on the performance of the battery is minimized. 本发明属于锂离子电池领域，具体涉及一种负极浆料添加剂、负极浆料及制备方法、负极片和锂离子电池。负极浆料添加剂能够与CMC分子链上羧甲基官能