What role does NMP play in the production of lithium-ion batteries?

Lithium-ion battery is today's internationally recognized ideal chemical energy, with small size, large capacity, high voltage advantages, is widely used in mobile phones, laptops and other electronic products, the expanding field of electric vehicles in the future to lithium-ion batteries bring greater space for development.

NMP belongs to nitrogen heterocyclic compounds, with a series of excellent physical and chemical properties, is a non-toxic, high boiling point, strong polarity, low viscosity, small corrosion, high solubility, low volatility, good stability, easy recovery of efficient selective solvents. Widely used in petrochemical, pesticide, medicine, electronic materials and other fields.

NMP is a very important auxiliary material for the production of lithium ion battery electrodes, the most commonly used solvent in the first part of the lithium ion battery dosing process, commonly known as methyl, scientific name N-methylpyrrolidone, molecular formula C5H9NO.

In the batching stage: as a PVDF solvent, participate in the dispersion of the slurry, forming a uniform medium and a stable slurry within a certain viscosity range for a long time.

In the coating stage: as the main liquid carrier of the slurry, it is evenly coated on the metal substrate with a stable thickness, which requires very good wettability and fluidity of the metal substrate.

In the coating and baking stage, the wet film runs at a constant speed in the oven, the solvent volatilizes regularly, NMP performs the function of poremaking, and NMP volatilizes from the wet film at a stable speed to form a porous microelectrode structure with uniform pore size and uniform distribution.