Tris(trimethylsilyl) Phosphate (TTSP) Electrolyte Additive
CAS Number: 10497-05-9
TTSP is a silicon-containing multifunctional electrolyte additive that scavenges trace HF generated from LiPF6 hydrolysis, forms a protective CEI on NMC cathodes, and improves cycle stability at elevated temperatures. Used at 0.5–2 wt%, it is particularly effective in high-voltage (>4.3V) NMC811 and NCA systems.
Technical Specifications
| appearance | Colorless to pale yellow liquid |
| purity (%) | ≥99.0 |
| acidity (ppm) | ≤30 |
| Si content (%) | ≥23.0 |
| moisture (ppm) | ≤50 |
Applications
- HF scavenger in LiPF6-based electrolytes
- NMC/NCA cathode CEI-forming additive
- High-voltage (>4.3V) electrolyte stabilizer
- High-temperature cycle life improvement additive
- Multi-additive electrolyte formulation component
Key Features
- Reacts rapidly with HF to form trimethylsilyl fluoride (TMSF), protecting battery components
- Deposits a thin CEI layer on Ni-rich cathodes, suppressing irreversible oxygen release
- Improves capacity retention at 45°C+ cycling conditions in high-nickel cells
- Compatible with FEC, LiDFP, and VC for comprehensive multi-additive strategies
Send Inquiry
More in Battery / Energy Storage Chemicals
1,3-Propane Sultone (1,3-PS) SEI Additive
1120-71-4
Acetylene Black Battery Grade (Shawinigan-Type)
1333-86-4
Adiponitrile (ADN) High-Voltage Electrolyte Additive
111-69-3
Alumina (Al2O3) Ceramic Separator Coating Powder
1344-28-1
Boehmite (AlOOH) Separator Coating Powder
1318-23-6
Carboxymethyl Cellulose (CMC) Anode Binder/Thickener
9004-32-4
Cobalt Sulfate Heptahydrate Battery Grade (CoSO4·7H2O)
10124-43-3
Conductive Carbon Black Super C45 Battery Grade
1333-86-4