| 摘要 |
A solid-state electrolyte suitable for use in an electrochemical cell includes a first borohydride salt, a second borohydride salt, and an ether solvent. The first borohydride salt can be magnesium borohydride, or a variate thereof, and the second borohydride salt can include lithium and/or sodium borohydride. The ether solvent is present at low concentration, insufficient to form a liquid electrolyte. The solid-state electrolyte is a homogeneous solid at room temperature, and possesses appreciable ionic conductivity. Methods for forming the solid-state electrolyte include combining the aforementioned components at specified molar ratios, and may include additional mixing. Electrochemical cells having the solid-state electrolyte support appreciable current density, and magnesium electrochemical cells in particular support magnesium deposition and stripping. |
| 主权项 |
1. A method for forming a solid-state electrolyte, the method comprising:
combining:
a first salt comprising a salt of at least one of the following formulae:
Mg(BH4-nXn)2; andMg(BH4)zY(2-z), where n is an integer between 0 and 4, inclusive; X is halogen, alkyl, aryl, or a combination thereof; Y is an anion; and z is a number within a range of 0.1 to 2, inclusive; and
a second salt, present at a molar ratio relative to the first salt within a range of 0.1:1 to 10:1, inclusive, the second salt comprising at least one of the following:
LiBH4;NaBH4;(ER1R2R3R4)BH4, where E is nitrogen or phosphorus; and R1, R2, R3, and R4 are each, independently alkyl, aryl, partially or fully fluorinated alkyl, partially or fully fluorinated aryl, alkyl ether, aryl ether, partially or fully fluorinated alkyl ether, partially or fully fluorinated aryl ether, hydrogen, or a combination thereof; and adding an ether solvent, having one or more ethereal oxygens, such that the ether solvent is present at a molar ratio within a range of 0.1:1 to 10:1, inclusive, relative to the first salt. |
