Aluminum-doped lithium phosphate (electrolyte additive)

Description

1. Product Overview
Aluminum-doped lithium phosphate (Li₁₋ₓAlₓPO₄) is a high-purity electrolyte additive engineered to enhance the stability and cycle life of lithium-ion batteries, particularly those using nickel-rich cathodes (NCM, NCA). By scavenging trace HF and water while forming a robust, low-impedance CEI (cathode-electrolyte interphase), it directly mitigates transition-metal dissolution and oxygen evolution. For battery manufacturers targeting extended calendar life and high-voltage operation (>4.4V), this additive is becoming a strategic enabler to meet EV and grid-storage warranty demands without sacrificing energy density.

2. Key Specifications & Technical Characteristics

• Chemical composition: Li₁₋ₓAlₓPO₄ (x = 0.02–0.05, tunable per customer)

• Purity level: ≥99.9% (metals basis); moisture content ≤50 ppm

• Physical characteristics:

  • Form: Fine crystalline powder

  • Color: White to off-white

  • Particle size (D50): 3–8 µm (standard); 1–3 µm (fine-grade available)

  • Tap density: 0.6–0.9 g/cm³

  • BET surface area: 4–8 m²/g

• Packaging options: 1 kg vacuum-sealed aluminized bags; 20 kg HDPE drums with desiccant; 500 kg FIBC (foil liner)

• Shelf life: 12 months when stored below 30°C in original unopened packaging under inert atmosphere (Ar or N₂)

3. Core Industrial Applications

• Primary industries: EV battery cell manufacturing, high-voltage consumer electronics batteries, stationary grid storage systems

• Specific use cases:

  • Added at 0.5–2.0 wt% to standard LiPF₆ electrolytes for NCM811 or NCA cathodes

  • Enables charge cut-off voltages of 4.5–4.6V without accelerated capacity fade

  • Reduces gas generation (swelling) in pouch cells during high-temperature storage (60°C, 30 days)

• Performance advantage: Compared to conventional additives (VC, PS, PST), aluminum-doped lithium phosphate delivers 35–50% lower DCIR growth after 1000 cycles and 20% higher capacity retention at 45°C. Its selective HF scavenging prevents corrosion of aluminum current collectors, a critical failure mode absent in organic additives.

4. Competitive Advantages

• Quality consistency: SPC-controlled batch process; each lot validated by ICP-OES (Al/Li ratio) and XRD (no secondary phases). COA with 12 parameters provided.

• Supply reliability: Dual-source raw material strategy with 6-month safety stock; production capacity 120 MT/year.

• Logistics capability: EXW, FOB, CIF from Tianjin / Rotterdam hubs; temperature-controlled dry van shipping.

• Price competitiveness: $120–180/kg depending on volume and particle-size grade – lower than Japanese or Korean equivalents by 15–20% at equivalent purity.

• Sustainability: Manufactured using water-based solvent-free milling; waste Li recovery >90%; complies with EU Battery Regulation (2023/1542).

• Technical support: Full formulation guidelines, compatibility testing (with EC/EMC/DMC solvents), and post-sale failure analysis included for direct B2B customers.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 20 kg (laboratory validation); 500 kg (production trial); 5 MT (regular bulk)

• BULK 20MT loading capacity: 20 MT per 20-ft dry container (500 kg FIBC x 40 bags, palletized with desiccant blanket)