What exactly is NMP, a lithium battery auxiliary material?

NMP is one of the most commonly used lithium battery auxiliary materials. NMP is the solvent for PVDF binder and is the English abbreviation of N-methylpyrrolidone. It is a colorless and transparent liquid with low toxicity, high boiling point, strong polarity, low viscosity, strong solubility, chemical stability, and thermal stability. It has excellent properties and can be miscible with water, PVDF, positive and negative electrode materials and other substances, and is widely used in the preparation of lithium batteries.

When making electrode sheets, NMP serves as a solvent to fuse various materials required for the electrode such as binder, positive active material, conductive agent, etc., so that the binder fully contacts other materials and is evenly distributed.

As a solvent, NMP's quality directly affects the quality of lithium-ion battery slurry coating, making it an indispensable solvent material.

Judging from the distribution of NMP application fields, it is mainly used in lithium battery preparation, accounting for 74%.