D3F {1,3,5-trimethyl-1,3,5-tris­(3,3,3-trifluoropropyl) cyclotrisiloxane, TTC, >99.0%} as Battery Electrolyte Additive, 25-100 g/bottle, CBEAD3F

D3F (1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane, C12H21F9O3Si3) is a specialized fluorosilicone cyclic trimer explored as a functional film-forming electrolyte additive for advanced lithium-ion batteries—particularly those utilizing high-nickel layered oxide cathodes and graphite or silicon-based anodes.   By combining a flexible siloxane (Si--O-Si) ring backbone with pendant trifluoropropyl groups, D3F is engineered to construct robust, hybrid protective interphases on both electrode surfaces.  

The key functional roles of D3F as battery electrolyte additive are shown below: (1) Hybrid Interfacial Passivation (SEI/CEI Formation): The siloxane core and trifluoropropyl chains participate in preferential reductive and oxidative decomposition reactions prior to the bulk carbonate solvents.This yields a dual-functioning protective film comprising inorganic silicon-oxygen species, silicates, and fluorine-rich components (such as LiF), which effectively passivates the electrode interfaces. (2) Protection of High-Voltage / Ni-Rich Cathodes: In cells operating at high upper cutoff voltages (~ 4.3-4.4 V), D3F helps build a stable Cathode Electrolyte Interphase (CEI) that mitigates parasitic electrolyte oxidation. By suppressing transition metal dissolution (such as manganese, cobalt, or nickel leaching from high-nickel oxides), it prevents those metal ions from migrating and poisoning the anode-side Solid Electrolyte Interphase. (3) Anode Stabilization: The fluorinated alkyl chains assist in homogenizing ion flux across the graphite or silicon-carbon anode interface, preventing localized structural degradation and reducing continuous electrolyte consumption during prolonged cycling.

Part Number	CBEAD3F (C-BEA-D3F)
CAS	2374-14-3
Chemical Formula	C12H21F9O3Si3
Appearance	White Solid (or Powder)
Purity	>99.0%
Molecular Weight	468.54 g/mol
Package Size	25 g, 50 g, and 100 g/bottle

Notes: Please try to store the D3F in a dry place (glovebox or dryroom is preferred)

References: 

1. Z. Xie, et al. Designing High-Temperature Stable Electrolytes: Insights from the Degradation Mechanisms of Boron-Containing Additives, Journal American Chemical Society (2025) 147 (27): 23931–23945.
2. J. Dong, et al. Toward stabilized electrode interfaces in lithium metal batteries with a multifunctional fluoroalkyl siloxane additive, Journal of Power Sources, 2026, 677, 239913