Lithium Difluorophosphate (LiDFP) Electrolyte Additive
CAS Number: 24389-25-1
Lithium difluorophosphate (LiDFP) is a multifunctional electrolyte additive that simultaneously improves both anode SEI quality and cathode surface stability, reducing impedance growth and extending calendar life. It is particularly effective in high-nickel NMC811 and silicon-containing cells at 0.5–2 wt% addition levels.
Technical Specifications
| Fe (ppm) | ≤2 |
| appearance | White crystalline powder |
| purity (%) | ≥99.5 |
| moisture (ppm) | ≤30 |
| free acid (ppm) | ≤50 |
Applications
- NMC811/NCA high-nickel cathode stabilizing additive
- Silicon-graphite anode electrolyte co-additive
- Calendar life extension additive for EV batteries
- Impedance reduction in cylindrical 4680 cells
- Multi-additive electrolyte (with FEC/VC/PS)
Key Features
- Dual functionality: simultaneously stabilizes both cathode CEI and anode SEI
- Reduces charge-transfer resistance growth over long-term cycling
- Effective at low doses (0.5–2 wt%), minimizing impact on electrolyte conductivity
- Synergistic with FEC, VC, and PS for comprehensive electrolyte additive packages
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