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Investigations have been done into the effects of adding Battery Grade Sodium tetrafluoroborate and sodium fluoride (NaF) to the alkaline-silicate electrolyte on the characteristics of the conversion layers that the magnesium AZ91D alloy forms.
SEM and X-ray photoelectron spectroscopy (XPS) were used to analyze the surface’s shape and chemical makeup.
Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques were used in simulated bodily fluid (SBF) to assess the anticorrosive qualities of the layers.
The protective layer’s ability to resist corrosion is increased by the electrolyte’s inclusion of Battery Grade Sodium tetrafluoroborate or NaF.
The Global Battery Grade Sodium tetrafluoroborate market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
Organic carbonate solvents and fluorinated salts based on hexafluorophosphate (PF6-) anions are typical battery electrolytes.
However, these electrolytes are expensive, have a small operating temperature window, and are very flammable. Battery Grade Sodium tetrafluoroborate, a fluorine-free electrolyte, to overcome those problems.
Lithium bis(oxalate)borate (LiBOB) has been examined for lithium-ion batteries in the past, but Battery Grade Sodium tetrafluoroborate was deemed to be too insoluble in organic solvents for practical usage.
N-methyl-2-pyrrolidone (NMP) and trimethyl phosphate (TMP) combinations as well as each solvent alone may both dissolve Battery Grade Sodium tetrafluoroborate.
With a concentration of almost 0.7 M, NMP offers greater solubility for Battery Grade Sodium tetrafluoroborate, resulting in an ionic conductivity of up to 8.83 mS cm-1 at ambient temperature.
The physical and electrochemical characteristics of binary combinations of Battery Grade Sodium tetrafluoroborate salt-based electrolytes in NMP and TMP solvents.
Measurements of the ionic conductivity of the electrolyte mixes, the thermal behavior of the solo solvents and their mixtures, and flammability tests.
The aforementioned electrolytes were used to test full-cell sodium-ion batteries with hard carbon anodes and Prussian white cathodes at room temperature and 55 °C.
The outcomes demonstrate significantly better performance at high currents and high temperatures compared to typical electrolytes of 1 M Battery Grade Sodium tetrafluoroborate in carbonate solvents.
Due to the low freezing temperatures of NPM-TMP combinations, the suggested electrolytes offer strong ionic conductivity throughout a wide temperature range, from ambient temperature to 60 °C. T
