Back to results
US 8,354,193 B2Granted
Electrolyte for a magnesium sulfur battery
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsJohn Muldoon, Hee Soo Kim, Masaki Matsui
Life of this patent
Estimating the term…
Abstract
An electrochemical device, having an anode containing magnesium; a cathode stable to a voltage of at least 3.2 V relative to a magnesium reference; and an electrolyte obtained by admixture of a magnesium salt of a non-nucleophilic base comprising nitrogen and aluminum trichloride in an ether solvent is provided. As sulfur is stable to a voltage of at least 3.2 V relative to a magnesium reference, a magnesium-sulfur electrochemical device is specifically provided.
Claims14
An electrochemical device, comprising:
- an anode comprising magnesium;
- a cathode stable to a voltage of at least 3.2 V relative to a magnesium reference;
- and
- a non-nucleophilic electrolyte;
- wherein
- the electrolyte comprises an electrochemically active salt of a solvated cation species, prepared in a medium, the salt comprising a magnesium ion dimer of formula (III):
- [Mg7Cl3]+ (III)
- and
- an anion of formula (IV):
- [AlCl3(B)]− (IV)
- the electrochemically active salt having been crystallized and removed from the medium of preparation and redissolved in an ether solvent to obtain the electrolyte,
- wherein
- B is a non-nucleophilic base comprising nitrogen.
10 more elements
A method for preparing an electrochemical device, comprising:
- connecting an anode comprising magnesium and a cathode stable to a voltage of at least 3.2 V relative to a magnesium reference via an external electrically conductive structure;
- and
- contacting the anode and cathode with a non-nucleophilic electrolyte
- wherein
- the electrolyte comprises an electrochemically active salt of a solvated cation specie, prepared in a medium, the salt comprising a magnesium ion dimer of formula (III):
- [Mg9Cl3]+ (III)
- and
- an anion of formula (IV):
- [AlCl3(B)]− (IV)
- the electrochemically active salt having been crystallized and removed from the medium of preparation and redissolved in an ether solvent to obtain the electrolyte,
- wherein
- B is a non-nucleophilic base comprising nitrogen.
9 more elements
Dependencies are inferred from the claim text.