Gel electrolyte for use in a magnesium battery
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsRana Mohtadi, Oscar Tutusaus
Life of this patent
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Abstract
Gel electrolytes and other solid electrolytes for magnesium batteries include a monocarboranyl magnesium salt and an ether solvent having a relatively high boiling point. A polymer forms a gel or other solid matrix throughout which the monocarboranyl magnesium salt and ether solvent are uniformly distributed. Methods for making such electrolytes include combining solutions of monocarboranyl magnesium salt and polymer, followed by selectively removing the solvent in which polymer has high solubility, forcing gel formation.
Claims20
An electrolyte for a magnesium battery, the electrolyte comprising:
- an ether solvent having a boiling point, at standard pressure, greater than 100° C.;
- a monocarboranyl magnesium salt;
- and
- a matrix-forming polymer, present at a concentration that exceeds its solubility in the ether solvent.
A three-dimensional magnesium battery, comprising:
- a magnesium foam anode;
- a continuous electrolyte layer coating all surfaces of the magnesium foam anode, the continuous electrolyte layer comprising:
- an ether solvent having a boiling point, at standard pressure, greater than 100° C.;
- a monocarboranyl magnesium salt;
- and
- a matrix-forming polymer, present at a concentration that exceeds its solubility in the ether solvent;
- and
- a continuous cathode layer coating most or all exposed surfaces of the continuous electrolyte layer.
A method of making a electrolyte for a magnesium battery, the method comprising:
- combining:
- a first solution having:
- an ether solvent having a boiling point, at standard pressure, greater than 100° C.;
- and
- a monocarboranyl magnesium salt dissolved in the ether solvent;
- and
- a second solution having:
- a second solvent having a boiling point, at standard pressure, less than 100° C.;
- and
- a polymer dissolved in the second solvent, the polymer having low solubility in the ether solvent;
- evaporatively removing the second solvent under conditions at which the ether solvent does not substantially evaporate, so that the polymer at least partially comes out of solution.
Dependencies are inferred from the claim text.