BSTFA (N,O-Bis(trimethylsilyl)trifluoroacetamide, BSA or NOB, >99.0%) as Battery Electrolyte Additive, 25-100 g/bottle, CBEABSTFA
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N,O-Bis(trimethylsilyl)trifluoroacetamide (BSTFA)—frequently referenced in electrochemical research as a functional electrolyte additive—has drawn attention for its ability to stabilize high-energy electrode interfaces, particularly for lithium and sodium-based batteries.
The main features of BSTFA in electrolyte engineering are: (1) Tailored SEI Passivation Layer: BSTFA preferentially reduces on the surface of reactive anodes (such as lithium metal) ahead of bulk electrolyte solvents. This reductive decomposition constructs a robust, hybrid solid electrolyte interphase (SEI) rich in inorganic and organosilicon components like LiF, Li3N, and SiOx. (2) Dendrite Suppression: The resulting inorganic-rich passivation layer regulates local Li+ flux, mitigating continuous electrolyte consumption and promoting uniform, dendrite-free metal deposition. (3) Electrochemical Polymerization: Due to its unsaturated molecular structure and functional groups, BSTFA-derived radical cations can participate in interfacial polymerization processes alongside carbonate co-solvents, improving the elasticity and structural integrity of the protective film. (4) Scavenging Impurities: Organosilicon compounds structurally related to BSTFA inherently act as effective moisture and trace-HF scavengers, protecting lithium salts (like LiPF6) from destructive hydrolysis pathways.
| Part Number |
CBEABSTFA (C-BEA-BSTFA) |
| CAS |
25561-30-2 |
| Chemical Formula |
C8H18F3NOSi2  |
| Appearance |
Colorless Liquid |
| Purity |
>99.0% (Battery Grade) |
| Molecular Weight | 257.40 g/mol |
| Density | 0.969 g/mL at 25 °C (lit.) |
| Boling Point | 45-50 °C/14 mmHg (lit.) |
| Package Size | 25 g, 50 g, and 100 g/bottle |
Notes: Please store the BSTFA liquid in a dry place (glovebox is the best option).
References:
- R. Jiang, et al., An acetamide additive stabilizing ultra-low concentration electrolyte for long-cycling and high-rate sodium metal battery, Energy Storage Materials, 2021, 42, 370-379.
- Y. Liu, et al., Multifunctional Electrolyte Additive Stabilizes Electrode–Electrolyte Interface Layers for High-Voltage Lithium Metal Batteries, ACS Appl. Mater. Interfaces (2021) 13 (48): 57430–57441.
- Z. Hu, et al., A Novel Electrolyte Additive Enables High-Voltage Operation of Nickel-Rich Oxide/Graphite Cells, J. Phys. Chem. Lett. (2021) 12 (18): 4327–4338.