The role of NMP in the battery

The most commonly used solvent in the pre-treatment of lithium-ion batteries is NMP, commonly known as methyl, known as N-methylpyrrolidone, and the molecular formula is C5H9NO. The role of NMP in the battery: as a PVDF solvent, participate in the dispersion of the slurry, form a uniform medium, and maintain a stable slurry for a long time in a certain viscosity range.

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

In the coating and baking stage: the wet film runs at a constant speed in the oven, the solvent is regularly volatilized, the NMP bears the pore-forming function, and the NMP volatilizes from the wet film at a steady speed to form a porous microelectrode structure with uniform pore size and uniform distribution.