Electrical double-layer capacitor for high-voltage operation at high-temperatures
AssigneeCorning Incorporated
InventorsWeirong Jiang, Atul Kumar, Cameron John Tovey
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Abstract
An electrical double-layer capacitor for high-voltage operation at high operating temperatures, includes a housing, carbon positioned in the housing, and electrolyte positioned in the housing. The carbon is activated and includes pores, where the pores in part provide the carbon with a high surface area of at least 500 m2/g. At an operating temperature of the electrical double-layer capacitor of 85° C. at sea level the electrical double-layer capacitor has a voltage output of at least 2.6 V.
Claims14
An electrical double-layer capacitor for high-voltage operation at high operating temperatures, comprising:
- a housing for the electrical double-layer capacitor;
- carbon positioned in the housing, wherein the carbon is activated and includes pores, wherein the pores in part provide the carbon with a high surface area of at least 500 m2/g, wherein the carbon is a low-oxygen activated carbon having a positive amount of chemically-bonded oxygen content that is less than 1.5% by weight thereof;
- electrolyte positioned in the housing, wherein the electrolyte is a low-operating temperature electrolyte having a solvent with a boiling point of less than 85° C. at atmospheric pressure at sea level;
- wherein at an operating temperature of the electrical double-layer capacitor of 85° C. at sea level:
- (A) the housing of the electrical double-layer capacitor has an internal pressure that is greater than the atmospheric pressure, and
- (B) the electrical double-layer capacitor has a voltage output of at least 2.6 V.
An electrical double-layer capacitor for high-voltage operation at high operating temperatures, the electrical double-layer capacitor comprising:
- a housing for the electrical double-layer capacitor;
- carbon positioned in the housing, wherein the carbon is activated and includes pores, wherein the pores provide the carbon with a high surface area of at least 500 m2/g, and wherein the carbon is a low-oxygen activated carbon having a positive amount of chemically-bonded oxygen content that is less than 1.5% by weight thereof;
- electrolyte positioned in the housing, wherein the electrolyte is a low-operating temperature electrolyte having a solvent with a boiling point of less than 85° C. at atmospheric pressure at sea level, and wherein the electrolyte is a high-concentration electrolyte having a molar concentration of at least 1.0 M;
- wherein at an operating temperature of the electrical double-layer capacitor of 85° C. at sea level:
- (A) the housing of the electrical double-layer capacitor has an internal pressure that is greater than the atmospheric pressure, and
- (B) the electrical double-layer capacitor has a voltage output of at least 2.6 V;
- and
- wherein at an operating temperature of the electrical double-layer capacitor of 65° C. at sea level the electrical double-layer capacitor has a voltage output of at least 2.9 V.
An electrical double-layer capacitor for high-voltage operation at high operating temperatures, comprising:
- a housing for the electrical double-layer capacitor;
- carbon positioned in the housing, wherein the carbon is activated and includes pores, wherein the pores provide the carbon with a high surface area of at least 500 m2/g, and wherein the carbon is a low-oxygen activated carbon having a positive amount of chemically-bonded oxygen content that is less than 1.5% by weight thereof;
- electrolyte positioned in the housing, wherein the electrolyte comprises an electrolyte salt dissolved in an organic solvent, wherein the electrolyte salt comprises tetraethylammonium tetrafluoroborate or triethylmethylammonium tetrafluoroborate;
- wherein at an operating temperature of the electrical double-layer capacitor of 85° C. at sea level:
- (A) the electrical double-layer capacitor has a voltage output of at least 2.6 V, and
- (B) the electrical double-layer capacitor has a beginning-of-life equivalent series resistance of about 0.5 mΩ or less at the voltage output of at least 2.6 V.
Dependencies are inferred from the claim text.