Mn(OTf)2 {[Manganese Triflate], >99.0%} Powder as Battery Electrolyte Additive, 5-25 g/bottle, CBEAMnOTf

Manganese(II) trifluoromethanesulfonate, Mn(OTf)2 (or Mn(CF3SO3)2, serves primarily as a functional salt or additive in non-aqueous and aqueous battery electrolytes. Its electrochemical utility spans cathode protection, artificial/modified interphase construction, and high-voltage stabilizing mechanisms.

The main roles of Mn(OTf)2 are shown below: (1) Cathode Interface Passivation (CEI Engineering): Triflate (OTf-) anions participate in the inner Helmholtz plane decomposition, producing an inorganic-rich, robust Cathode Electrolyte Interphase (CEI) containing LiF, MnF2, and metal sulfates/oxysulfates. This passivates active facets on high-voltage or conversion cathodes, suppressing transition-metal dissolution and catalytic solvent oxidation. (2) Transition-Metal Dissolution Suppression via Equilibrium Shift: In manganese-based cathodes (e.g., LiMn2O4, LiNi0.5Mn1.5O4, and Na-layered NaMnO2), adding a trace concentration of Mn^{2+} ions into the bulk electrolyte lowers the chemical driving force for Mn^{2+} leaching via Le Chatelier’s principle (disproportionation reaction). (3) Solvation Structure Modulation: The strong coordination between divalent Mn^{2+} and polar solvent molecules (e.g., cyclic/linear carbonates or ether oxygen atoms) strips free solvent molecules from primary solvation sheaths, lowering the overall solvent vapor pressure and elevating anodic oxidative stability. (4) SEI Pre-Lithiation / Pre-Sodiation Shielding: On the anode side, controlled trace reduction of Mn^{2+} can generate uniformly distributed, conductive catalytic nucleation centers or contribute to an inorganic composite SEI, promoting uniform plating and mitigating localized dendrite formation.

Part Number	CBEAMnOTf (C-BEA-MnOTf)
Chemical Formula & Structure	C2F6MnO6S2
Appearance	White Powder
Purity	>99.0%
Molecular Weight	353.08 g/mol
Package Size	5 g, 10 g, and 25 g/bottle

Notes: Please store the Mn(OTf)2 powder in the glovebox due to its sensitivity to humidity and oxygen 

References: 

1. Z. Zhou, et al. Energy storage mechanisms and manganese deposition effects in zinc-manganese batteries with various anion salt electrolytes, Journal of Power Sources, 2025, 644, 237179.
   
2. D. Zhang, et al., Electrolyte Additive Strategies for Safe and High-Performance Aqueous Zinc-Ion Batteries: A Mini-Review, Energy Fuels (2024) 38 (14): 12510–12527.