What is N-Methyl-2-Pyrrolidone (NMP) Solvent?

N-Methyl-2-Pyrrolidone (NMP) is a high-performance organic solvent widely used in lithium-ion battery manufacturing, specifically for cathode material preparation. It offers excellent solvency, chemical stability, high boiling point, and compatibility with various battery chemistries.

Chemical Properties and CAS Number

• Material: N-Methyl-2-Pyrrolidone (NMP)

• CAS Number: 872-50-4

• Chemical Formula: C₅H₉NO

• Molecular Weight: 99.13 g/mol

• Appearance: Clear, colorless to pale yellow liquid

• Density: 1.03 g/cm³ at 25°C

• Melting Point: -24°C

• Boiling Point: 202°C

• Flash Point: 95°C

• Solubility: Highly soluble in water and organic solvents

• Purity: Battery-grade typically ≥99.9%

Applications of NMP Solvent in Lithium Battery Cathode Materials

• Lithium-ion Battery Manufacturing: Essential for cathode slurry preparation, dispersing active materials (NMC, LCO, LFP, NCA) uniformly onto current collectors.

• Electrode Coating: Enables smooth and homogeneous cathode coatings, improving battery performance, cycle life, and safety.

• Polymer Binder Solvent: Dissolves and disperses PVDF binders, crucial for stable electrode structure.

• Supercapacitor Electrodes: Utilized similarly in preparing electrode slurries.

• Electronic & Semiconductor Industry: Used in cleaning and electronic material processing due to excellent solvency.

• Chemical & Pharmaceutical: Acts as a solvent in various industrial and pharmaceutical syntheses.

Pricing of NMP Solvent for Lithium Batteries

Prices vary based on purity, quantity, and market conditions:

• Laboratory/Small-scale Orders: $20 – $50 per liter

• Industrial-grade Bulk Orders: $5 – $15 per liter

• High-purity Battery Grade (>99.9%): Pricing available upon request

Factors Influencing Pricing

• Solvent purity level (battery-grade vs industrial-grade)

• Volume ordered (bulk purchasing provides cost savings)

• Market demand fluctuations (battery industry dynamics)

• Shipping, handling, and regulatory compliance costs