Borohydride solvo-ionic liquid family for magnesium battery

摘要

A method for forming a solvo-ionic liquid suitable for use as an electrolyte in an electrochemical cell is provided. The solvo-ionic liquid, a mixture including a multidentate ethereal solvent and magnesium borohydride, can be a liquid, a gel or a solid at room temperature and generally has high thermal stability including virtually no volatility at a typical cell operating temperature. An electrochemical cell having a solvo-ionic liquid as electrolyte is also disclosed. The electrochemical cell will typically be a rechargeable magnesium battery, having an anode suitable to accommodate magnesium oxidation during battery discharge.

主权项

1. A method for forming an electrolyte composition including a solvo-ionic liquid, the method comprising:
combining a multidentate ethereal solvent with a salt mixture to produce a solvate, the salt mixture containing Mg(BH4)2, and the solvate having a molar ratio of multidentate ethereal solvent to Mg(BH4)2 within a range of 0.1:1 to 10:1, inclusive, wherein, due to the relative concentrations of the combined solvent and salt mixture, the solvate becomes the solvo-ionic liquid.