Humic Acid-Based Supercapacitors
AssigneeNanotek Instruments, Inc.
InventorsSong-Hai Chai, Aruna Zhamu, Bor Z. Jang
Life of this patent
Estimating the term…
Abstract
A supercapacitor electrode comprising a mixture of graphene sheets and humic acid, wherein humic acid occupies 0.1% to 99% by weight of the mixture and the graphene sheets are selected from a pristine graphene material having essentially zero % of non-carbon elements, or a non-pristine graphene material having 0.001% to 5% by weight of non-carbon elements wherein said non-pristine graphene is selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, or a combination thereof; and wherein said mixture has a specific surface area greater than 500 m2/g.
Claims34
A supercapacitor electrode comprising a mixture of graphene sheets and humic acid, wherein said humic acid occupies 0.1% to 99% by weight of the mixture and said graphene sheets are selected from a pristine graphene material having essentially zero % of non-carbon elements, or a non-pristine graphene material having 0.001% to 5% by weight of non-carbon elements wherein said non-pristine graphene is selected from the group consisting of graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, and a combination thereof;
- and wherein said mixture has a specific surface area greater than 500 m2/g.
A supercapacitor electrode comprising humic acid molecules having an oxygen content of 0. 01% to 42% by weight as an electrode active material, wherein said electrode has a specific surface area greater than 500 m2/g.
Dependencies are inferred from the claim text.