DOTf {Dimethylformamidium Trifluoromethanesulfonate, >98.0%} Powder as Electrolyte Additive for Aqueous Zinc Ion Battery, 5 g/bottle, CAZIBEADOTf

DOTf (N,N-dimethylformamidium trifluoromethanesulfonate, HCON(CH3)2+CF3SO3^-) is a specialized, mildly acidic organic-inorganic hybrid salt used as an advanced electrolyte additive in high-performance aqueous zinc-ion batteries (AZIBs). Designed to target the solid electrolyte interphase (SEI) on zinc metal anodes, DOTf acts as a functional precursor that engineers a stable, protective passivation layer in-situ.

The key functions of DOTs are: (1) In-Situ Generation of an Inorganic Protective SEI (ZnS Formation): When introduced in minor amounts (typically 0.05 M to 0.1 M}) into standard aqueous zinc electrolytes (such as ZnSO4), DOTf provides controlled localized acidity. This mild proton activity facilitates the electrochemical reduction and decomposition of sulfate anions (SO4^{2-}), reacting locally with Zn^{2+} to construct an inorganic-rich zinc sulfide (ZnS) passivation layer on the zinc surface. (2) Mitigation of Dendrites and Side Reactions: The resulting ZnS-rich interphase acts as an artificial SEI that smooths out local electric field gradients, promotes uniform 2D horizontal zinc deposition, and successfully suppresses both zinc dendrite propagation and parasitic hydrogen evolution reactions (HER). (3) Synergistic Triflate Anion Integration: The trifluoromethanesulfonate (OTf-) component assists in restructuring the primary solvation sheath of zinc ions near the inner Helmholtz layer, reducing free water activity at the electrode interface.

Part Number	CAZIBEADOTf (C-AZIB-EA-DOTf)
Chemical Formula	C₄H₈F₃NO₄S
CAS	705301-17-3
Appearance	White Powder
Purity	>98.0%
Molecular Weight	223.17 g/mol
Package Size	10 g, 25 g, and 50 g/bottle

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

References: 

1. C. Li, et al. Highly reversible Zn anode with a practical areal capacity enabled by a sustainable electrolyte and superacid interfacial chemistry, Joule, 2022, 6, 1103-1120
   
2. L. Wu, et al., Sulfurized Composite Interphase Enables a Highly Reversible Zn Anode,Angew Chem Int Ed, 2025, 64, e202419495