Research-Grade Electrolyte Salt Magnesium Fluoroalkoxyborate Mg[B(HFIP)₄]₂ with High Oxidation Resistance Voltage High Ionic Conductivity and High Coulombic Efficiency

Electrolyte salt Mg[B(HFIP)4]2 is mainly used in organic magnesium-metal batteries and can be dissolved in various solvents as electrolytes.

The electrolyte salt Mg[B(HFIP)₄]₂ is mainly used in organic magnesium metal batteries. It is soluble in various eth-based solvents and can be used as an electrolyte. Among its key features, the large boron-centered anion exhibits high oxidative stability, weak coordination ability, and good compatibility with magnesium metal anodes—these properties enable the electrolyte to deliver high oxidation resistance voltage, high ionic conductivity, and high Coulombic efficiency.

Mg[B(HFIP)₄]₂ is commonly applied in the magnesium battery industry. Its high conductivity outperforms that of Mg(TFSI)₂ and Mg(CF₃SO₃)₂, while eliminating concerns about stability and safety. When used as a magnesium salt in the electrolyte of primary magnesium metal batteries, it can effectively enhance the electrolyte’s high operating voltage and cycle performance.

The solubility of Mg[B(HFIP)₄]₂ in various solvents at room temperature (25°C). Its excellent solubility in solvents can improve the electrical conductivity and viscosity of the electrolyte.

1.Mass spectrometry anions of 0.3M Mg[B(HFIP)₄]₂/DME electrolyte. For the ESI-MS (Electrospray Ionization Mass Spectrometry) of the anion structure in 0.3M Mg[B(HFIP)₄]₂/DME electrolyte, the intense peak at m/z: 678.9793 indicates that the anion structure of the product is [B(OC(H)(CF₃)₂)₄]⁻.2.Coulombic Efficiency of 0.3 M Mg[B(HFIP)₄]₂/DNE Electrolyte,When the electrolyte operates at 0.50 mA/cm² and 0.25 mAh/cm² for more than 200 cycles, it achieves an average coulombic efficiency of 98%.3.Long-Cycle Performance of 0.3M Mg[B(HFIP)₄]₂/DJIE Electrolyte in Symmetric Cells,The electrolyte operates stably for 350 hours under the conditions of 0.1 mA/cm² (current density) and 0.1 mAh/cm² (areal capacity).

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