The most commonly used solvent in the front batching process of lithium ion battery－-NMP

NMP is a nitrogen heterocyclic compound with a series of excellent physical and chemical properties. It is a highly efficient and selective solvent with non toxicity, high boiling point, strong polarity, low viscosity, low corrosivity, high solubility, low volatility, good stability and easy recovery. It is 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. It is the most commonly used solvent in the front batching process of lithium-ion battery, commonly known as methyl, scientifically known as N-methylpyrrolidone, and the molecular formula is C5H9N0.

In the batching stage: as PVDF solvent, it participates in slurry dispersion to form a slurry with uniform medium and stable viscosity 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. 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 uniform speed in the oven, and the solvent volatilizes regularly. NMP undertakes the pore forming function. NMP volatilizes from the wet film at a stable speed to form a porous microelectrode structure with uniform pore size and uniform distribution.

The NMP waste gas recovery and treatment system and waste heat recovery device of the coater can achieve the "zero" emission requirements by recovering the NMP waste gas and purifying the air. The waste heat recycling can meet the requirements of customers to save thermal energy efficiency of 65-80%, low investment, low energy consumption and low power, which is about 10% of the imported machine. It can reach and exceed Japan's nichias without runner at all Hydrophobic zeolite ketone adsorption honeycomb runner is a high cost-effective product.