Lithium bis(fluorosulfonyl)imide (LiFSI)

Description

1. Product Overview
Lithium bis(fluorosulfonyl)imide (LiFSI) is a high-performance lithium salt electrolyte additive and conducting salt, primarily used in advanced lithium-ion batteries. Its superior thermal stability and ionic conductivity enable next-generation battery chemistries, including high-voltage and high-energy-density systems. As the electric vehicle (EV) and grid storage sectors push beyond conventional LiPF₆ limits, LiFSI delivers a strategic performance edge in cycle life, low-temperature operation, and safety. This product is a critical enabler for manufacturers targeting premium energy storage solutions.

2. Key Specifications & Technical Characteristics

• Chemical composition: Li⁺[N(SO₂F)₂]⁻

• Purity level: ≥99.9% (battery grade) / ≥99.5% (industrial grade)

• Physical form: White crystalline powder

• Melting point: 124–128°C

• Moisture content: ≤20 ppm (battery grade)

• Free acid (HF equivalent): ≤50 ppm

• Chloride (Cl⁻): ≤10 ppm

• Packaging options: 1 kg HDPE bottles, 25 kg fiber drums, 200 kg stainless steel drums with inert gas purging

• Shelf life: 12 months (sealed, dry argon atmosphere, ≤25°C)

3. Core Industrial Applications

• Primary industries: Electric vehicle (EV) battery manufacturing, consumer electronics (smartphones/laptops), stationary energy storage systems.

• Operational use cases: Electrolyte formulation for high-nickel (NMC 811, NMC 955) and high-voltage (≥4.4V) cathodes; additive (0.5–3 wt%) to suppress impedance rise and gas evolution; co-salt with LiPF₆ to extend cycle life at 60°C+.

• Performance advantage: LiFSI’s weaker ion pairing and higher conductivity (≥10 mS/cm at 1M in EC/EMC) reduce internal resistance by 15–25% versus LiPF₆ alone, while its thermal decomposition onset (>200°C) improves safety margins. Result: longer calendar life and faster charge acceptance.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified production with statistical process control; every lot tested via IC, ICP-MS, and Karl Fischer.

• Supply reliability: Dedicated manufacturing lines with ≥500 MT annual capacity; buffer stock maintained in three regional hubs (Asia, Europe, North America).

• Logistics capability: UN classified as Class 9 hazardous material — full compliance with IATA/IMDG; temperature-controlled shipping options available.

• Price competitiveness: Transparent index-based pricing (linked to lithium carbonate spot) with volume discount tiers.

• Sustainability: 98% solvent recovery in synthesis; halogen-free byproduct stream; full REACH and RoHS disclosure.

• Technical support: Access to electrolyte formulation modeling, on-site moisture analysis protocols, and batch traceability via blockchain-ready QR codes.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 25 kg (trial qualification) / 500 kg (commercial)

• Bulk 20 MT loading capacity: 20 MT per 20-foot dry container (palletized, 200 kg drums — 100 drums total)