HTFSI {Bis(trifluoromethanesulfonyl)imide, >99.0%} Powder as Electrolyte Additive for Aqueous Zinc Ion Battery, 10-50 g/bottle, CAZIBEAHTFSI

HTFSI (Bis(trifluoromethanesulfonyl)imide, HN(SO2CF3)2), frequently utilized in its acid form or as a functional proton/imide donor, serves as a specialized electrolyte additive in advanced lithium-ion, sodium-ion, and specialized aqueous/non-aqueous battery formulations. While its deprotonated salt counterpart (LiTFSI or NaTFSI) is a mainstream high-performance conductive salt, introducing the acid form (HTFSI) in trace amounts triggers distinct chemical and electrochemical modifications.

The key functions of HTFSI are: (1) In-Situ Salt Generation & Solvation Tuning: When added in controlled minor quantities to an electrolyte containing metal oxides or hydroxides (or when reacting with trace basic impurities), HTFSI converts in-situ into the corresponding metal TFSI salt, seamlessly integrating into the bulk electrolyte without introducing foreign halide contaminants. (2) Protic Pre-Passivation / Initial SEI Engineering: As a strong Brønsted acid, trace amounts of HTFSI can participate in controlled initial proton-assisted or anion-derived reactions on reactive metal or graphite anodes. This aids in constructing a robust, inorganic-organic hybrid Solid Electrolyte Interphase (SEI) rich in nitrogen, sulfur, and fluorine fragments (such as -SO2- and -CF3 species). (3) Scavenging Basic Impurities: HTFSI acts as an effective neutralizer for alkaline or basic contaminants that often linger in separator membranes, current collectors, or poorly dried active materials, preventing alkaline-catalyzed degradation of standard carbonate solvents or salt binders.

Part Number	CAZIBEAHTFSI (C-AZIB-EA-HTFSI)
Chemical Formula	C2HF6NO4S2
Appearance	White Powder
Purity	>99.0%
Molecular Weight	281.14 g/mol
Package Size	10 g, 25 g, and 50 g/bottle

Notes: Please store the HTFSI powder in the glovebox due to its sensitivity to humidity and oxygen 

References: 

1. Q. Nian, et al. Highly reversible zinc metal anode enabled by strong Brønsted acid and hydrophobic interfacial chemistry, Nature Communications, 2024, 15, 4303.
   
2. G. R. Pastel, et al., Designing interphases for highly reversible aqueous zinc batteries, Joule, 2024, 8, 1050-1062