Role of N-methylpyrrolidone in the production of lithium ion batteries

Lithium ion batteries are currently internationally recognized as the ideal chemical energy source, with the advantages of small size, large capacitance, and high voltage. They are widely used in electronic products such as mobile phones and laptops. The expanding field of electric vehicles will bring greater development space for lithium ion batteries in the future.

NMP is a nitrogen heterocyclic compound with a series of excellent physical and chemical properties. It is a highly efficient selective solvent that is non-toxic, high boiling point, strong polarity, low viscosity, low corrosivity, high solubility, low volatility, good stability, and easy to recover. It is widely used in fields such as petrochemical, pesticide, medicine, electronic materials, etc.

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

In the batching stage: as a PVDF solvent, it participates in the dispersion of the slurry and forms a slurry with a uniform medium that remains stable for a long time within a certain viscosity range.

In the coating stage: As the main liquid carrier of the slurry, it is uniformly coated on the metal substrate with a stable thickness, requiring excellent wettability and fluidity with the metal substrate. During the coating and baking stage, the wet film runs at a uniform speed in the oven, with the solvent regularly volatilizing. NMP assumes the pore forming function, and NMP volatilizes from the wet film at a stable speed, forming a porous microelectrode structure with uniform pore size and distribution.

The https://www.eschemy.com/product/organic-solvent-methylpyrrolidone-nmp-872-50-4NMP waste gas recovery and treatment system and waste heat recovery device of the coating machine recover the NMP waste gas, and the air is purified to meet the "zero" emission requirements. The waste heat recycling can achieve a thermal energy saving efficiency of 65-80% according to customer requirements, with small investment, low energy consumption, and low power, which is about 10% of the imported machine. Without a runner, it can meet and exceed the various performance indicators of the NICHIAS hydrophobic zeolite ketone adsorption honeycomb runner in Japan, Is a cost-effective product.