Activated Carbon with Surface Modified Chemistry
AssigneeAquion Energy Inc.
InventorsJay Whitacre, Sneha Shanbhag
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Abstract
An energy storage device including an anode electrode comprising activated carbon with nitrogen containing surface groups that provide psuedocapacitive properties to the activated carbon, a cathode electrode, a separator, and an electrolyte.
Claims20
An anode electrode for energy storage device, comprising activated carbon with nitrogen containing surface groups that provide psuedocapacitive properties to the activated carbon, wherein the activated carbon has a specific surface area of 1000 meters2/gram or less determined by BET method and a specific capacitance of greater than 120 farads/gram in an aqueous alkali cation based electrolyte.
A method comprising:
- soaking activated carbon in an acid to form soaked activated carbon having at least a 50% increase in specific capacitance over the activated carbon prior to soaking;
- and
- forming an anode electrode for a secondary hybrid aqueous energy storage device from the soaked activated carbon.
A method of making an electrode, comprising:
- forming an activated carbon with a specific surface area below 1200 m2/g;
- treating the activated carbon to form nitrogen surface groups thereon wherein the content of nitrogen on the surface of the activated carbon is 1-10 atomic percent;
- and
- forming the activated carbon into an electrode which has a specific capacitance per surface area of at least 0.1 F/m2.
Dependencies are inferred from the claim text.