Electrode compositions and related energy storage devices
AssigneeGeneral Electric Company
InventorsRichard Louis Hart, Michael Alan Vallance, Brandon Alan Bartling, Ayesha Maria Gonsalves
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Abstract
A positive electrode composition is presented. The composition includes granules that comprise an electroactive metal, an alkali metal halide, sulfur and carbon. A molar ratio of the electroactive metal to an amount of sulfur in the composition is between about 1.5:1 and about 10:1. Carbon is present in an amount greater than about 0.1 and less than about 5 weight percent, based on a total weight of the granules. An energy storage device and a related energy storage system are also described.
Claims20
A positive electrode composition comprising granules which themselves comprise:
- an electroactive metal,
- an alkali metal halide,
- an amount of sulfur, wherein a molar ratio of the electroactive metal to the amount of sulfur is between about 1.5:1 and about 10:1;
- and
- an amount of carbon greater than about 0.1 weight percent and less than about 5 weight percent, based on a total weight of the granules.
An energy storage device comprising a first compartment comprising an alkali metal, a second compartment comprising a positive electrode composition, and a solid separator capable of transporting alkali metal ions between the first compartment and the second compartment, wherein the positive electrode composition comprises:
- (a) an electrolyte salt comprising a complex metal halide;
- and
- (b) granules that themselves comprise:
- (v) an electroactive metal,
- (vi) an alkali metal halide,
- (vii) an amount of sulfur, wherein a molar ratio of the electroactive element to the amount of sulfur in the granules is between about 1.5:1 and about 10:1;
- and
- (viii) an amount of carbon greater than about 0.1 weight percent and less than about 5 weight percent, based on the total weight of the granules.
Dependencies are inferred from the claim text.