Zn(BF4)2·xH2O (Zinc Tetrafluoroborate Hydrate, >99.0%) Powder as Electrolyte Salt for Aqueous Zinc-Ion Battery, 50-200 g/bottle, CAZIBESZBF
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Zinc tetrafluoroborate hydrate (Zn(BF4)2· xH2O) powder is a specialized, fluorinated alternative electrolyte salt utilized in advanced research for aqueous zinc-ion batteries (AZIBs). Positioned between conventional sulfates and bulky organic sulfonates/imides, tetrafluoroborate (BF4^-) offers unique interfacial and solvation characteristics that actively modify the electrode-electrolyte boundary.
The key electrochemical advantages of Zn(BF4)2 as electrode salt are: (1) Anion-Derived Interphase Engineering (SEI/CEI): Unlike sulfate ions (SO4^{2-}), which rarely participate directly in the inner Helmholtz layer reduction, the BF4^- anion can undergo controlled electrochemical or chemical decomposition during initial cycling. This contributes to the in-situ formation of a robust, inorganic-rich passivating layer containing boron and fluorine species (such as ZnF2, B2O3, and complex fluoroborates) on the zinc anode. (2) Suppression of Dendrites and Side Reactions: The resulting hybrid inorganic-organic interphase promotes uniform 2D horizontal zinc electrodeposition, effectively smoothing out local electric field hotspots and mitigating dendrite growth and parasitic hydrogen evolution (HER). (3) High Dissociation and Conductivity: The BF4^- anion is symmetrical and weakly coordinating compared to divalent sulfates, leading to weaker ion-pairing with Zn^{2+} and ensuring high ionic conductivity across a broad temperature range. (4) Prevention of Basic Salt Precipitation: Similar to triflate systems, Zn(BF4)2 solutions are far less susceptible to forming insulating basic zinc sulfate by-products (Zn4SO4(OH)6 · xH2O) during localized pH shifts.
| Part Number |
CAZIBESZBF (C-AZIB-ES-ZBF) |
| Chemical Formula |
Zn(BF4)2·xH2O (CAS: 27860-83-9) |
| Appearance |
White Powder |
| Purity |
>99.0% |
| Molecular Weight | 239.00 g/mol (anhydrous basis) |
| Package Size | 50 g, 100 g, and 200 g/bottle |
Notes: Please store the Zn(BF4)2·xH2O powder in a dry place.
References:
- W. Huang, et al. Enhanced Cycling Stability in Zn-Ion Batteries Using Aqueous-Organic Electrolyte Solvent Blends, Adv. Sci., 2025, 12, e07332
- D. Wang, et al. Localized Anion-Cation Aggregated Aqueous Electrolytes with Accelerated Kinetics for Low-Temperature Zinc Metal Batteries, Angew Chem Int Ed, 2023, 62, e202315834