Adiponitrile (ADN) High-Voltage Electrolyte Additive
CAS Number: 111-69-3
Adiponitrile (ADN) is a dinitrile electrolyte additive that stabilizes high-voltage cathodes (>4.5V) by coordinating with transition metal sites on NMC surfaces, forming a robust CEI that suppresses electrolyte oxidation. It is effective in next-generation 5V-class spinel and lithium-rich layered oxide systems.
Technical Specifications
| appearance | Colorless to pale yellow liquid |
| purity (%) | ≥99.5 |
| N content (%) | ≥26.0 |
| moisture (ppm) | ≤50 |
| density (g/mL, 20°C) | 0.965–0.970 |
Applications
- High-voltage NMC (>4.5V) electrolyte cathode additive
- 5V-class spinel LiNi0.5Mn1.5O4 (LNMO) electrolyte
- Lithium-rich layered oxide electrolyte additive
- Solid electrolyte interphase co-former
- Ionic liquid electrolyte co-solvent
Key Features
- Cyano groups strongly coordinate with Ni/Mn on cathode surface, blocking electrolyte oxidation
- Improves capacity retention of LNMO cells to >80% at 300 cycles
- Reduces Mn dissolution and cross-contamination to graphite anode
- Liquid at room temperature for easy handling and blending into electrolyte
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