Hydrogel derived carbon for energy storage devices
AssigneeSparkle Power Inc.
InventorsDavid Mitlin, Jia Ding
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Abstract
An energy storage device, such as a sodium ion capacitor, including an anode and a cathode, at least one of the anode and the cathode including a nitrogen and oxygen functionalized carbon (NOFC). The NOFC has a nitrogen content greater than 4 wt %, such as 13 wt %, an oxygen content greater than 8 wt %, such as 11 wt %, and a surface area greater than 800 m2g−1, such as 945 m2g−1. The energy storage device has favorable reversible and rate capability, such as 437 mAhg−1 at 100 mAg−1, and 185 mAhg−1 at 1600 mA g−1.
Claims26
An energy storage device, comprising:
- an anode;
- a cathode, at least one of said anode and said cathode comprising a nitrogen and oxygen functionalized carbon (NOFC);
- the NOFC including a nitrogen content greater than 4 wt %, an oxygen content greater than 8 wt %, and a surface area greater than 800 m2 g−1.
A energy-storage device, comprising:
- a housing, said housing comprising dimensions that conform to standardized battery dimensions;
- and
- a capacitor cell, said capacitor cell disposed in the housing and electrically coupled to said housing, wherein said capacitor cell comprises at least one of a positive electrode and a negative electrode, the at least one of the positive electrode and the negative electrode comprising an activated carbon material;
- wherein the activated carbon material comprises a nitrogen content greater than 4 wt %, an oxygen content greater than 8 wt %, and a surface area greater than 800 m2 g−1.
An electrode fabricated from an activated carbon material, comprising:
- a nitrogen content of at least 4 wt %;
- an oxygen content of at least 8 wt %;
- a surface area greater than 800 m2g−1;
- and
- a reversible capacity of at least 279 mAh g−1.
Dependencies are inferred from the claim text.