Porous carbons from carbohydrates
First Claim
1. A method of making a porous carbon comprising(a) curing a mixture under conditions effective so as to produce a cured carbon, said mixture comprising:
- (i) at least one carbohydrate,(ii) at least one dehydrating component, and(iii) at least one pore-forming agent comprising a nonmetallic cation of a nonmetal salt; and
(b) carbonizing the cured carbon under conditions effective to provide a porous carbon having a surface area between about 100 m2/g and about 3000 m2/g, wherein said at least one pore forming agent comprises an ammonium cation, wherein step (a) includes removing substantially all of the water from the mixture and wherein step (a) includes producing a porous monolith.
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Accused Products
Abstract
A porous carbon characterized by a volumetric pore size distribution having two peaks, a first of said peaks being between 0.5 and 1.0 nm and a second of said peaks being between 1.0 and 5.0 nm. The porous carbon may have a volumetric capacitance in an organic electrolyte of at least 40 F/cm3, an average pore diameter between about 2 nm and about 30 nm, a surface area of at least 900 m2/g, and/or a density of at least 0.4 g/cm3. A method for making such a carbon includes a) curing a mixture comprising a carbohydrate, a dehydrating component, and a nonmetallic cationic pore-forming agent and b) carbonizing the cured carbon under conditions effective to provide a porous carbon having a surface area between about 100 m2/g and about 3000 m2/g. The the dehydrating component and nonmetallic cationic component may comprise two moieties of one compound.
48 Citations
37 Claims
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1. A method of making a porous carbon comprising
(a) curing a mixture under conditions effective so as to produce a cured carbon, said mixture comprising: -
(i) at least one carbohydrate, (ii) at least one dehydrating component, and (iii) at least one pore-forming agent comprising a nonmetallic cation of a nonmetal salt; and (b) carbonizing the cured carbon under conditions effective to provide a porous carbon having a surface area between about 100 m2/g and about 3000 m2/g, wherein said at least one pore forming agent comprises an ammonium cation, wherein step (a) includes removing substantially all of the water from the mixture and wherein step (a) includes producing a porous monolith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 32, 33, 34, 35, 36)
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28. A method of making a porous carbon comprising
(a) curing a mixture under conditions effective so as to produce a cured carbon, said mixture comprising: -
(i) at least one carbohydrate, (ii) at least one dehydrating component, and (iii) at least one pore-forming agent comprising a nonmetallic cation of a nonmetal salt; and (b) carbonizing the cured carbon under conditions effective to provide a porous carbon having a surface area between about 100 m2/g and about 3000 m2/g, wherein said at least one pore forming agent comprises an ammonium cation, and wherein said at least one carbohydrate is selected from the group consisting of sucrose, fructose and glucose. - View Dependent Claims (29, 30, 31)
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37. A method of making a porous carbon comprising
(a) curing a mixture under conditions effective so as to produce a cured carbon, said mixture comprising: -
(i) at least one carbohydrate, (ii) at least one dehydrating component, and (iii) at least one pore-forming agent comprising a nonmetallic cation of a nonmetal salt; and (b) carbonizing the cured carbon under conditions effective to provide a porous carbon having a surface area between about 100 m2/g and about 3000 m2/g, wherein said dehydrating component and said nonmetallic cation of a nonmetal salt comprise two moieties of one compound, and wherein the dehydrating component is bisulfate.
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Specification