The role of NMP in the production of lithium-ion batteries
NMP is a very important auxiliary material for the production of lithium-ion battery electrodes. The most commonly used solvent in the pre-treatment of lithium-ion batteries is commonly known as methyl, the scientific name is N-methylpyrrolidone, and the molecular formula is C5H9NO.
In the batching stage: 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.