Nitrogen-doped carbon aerogels for electrical energy storage
Disclosed here is a composition comprising a nitrogen-doped carbon aerogel, wherein the nitrogen-doped carbon aerogel comprises a polymerization product of formaldehyde and at least one nitrogen-containing resorcinol analog. Also disclosed is a supercapacitor comprising the nitrogen-doped carbon aerogel.
1. A composition comprising a nitrogen-doped carbon aerogel, wherein the nitrogen-doped carbon aerogel consists essentially of polymerization product of formaldehyde and at least one nitrogen-containing resorcinol analog.
2. The composition of claim 1 , wherein the resorcinol analog is selected from (a) an aromatic compound comprising a nitrogen-containing ring linked to at least two hydroxyl groups and (b) an aromatic compound comprising a benzene ring or nitrogen-containing ring linked to at least one hydroxyl group and at least one amine group, wherein the nitrogen-containing ring is selected from the group consisting of pyridine, pyrazine, pyrimidine, pyridazine, pyrrole, pyrazole and imidazole.
3. The composition of claim 1 , wherein the resorcinol analog comprises pyridinediol.
4. The composition of claim 3 , wherein the pyridinediol comprises 2,3-pyridinediol, 2,4-pyridinediol, 2,5-pyridinediol, 3,4-pyridinediol, and/or 3,5-pyridinediol.
5. The composition of claim 1 , wherein the resorcinol analog comprises aminophenol.
6. The composition of claim 5 , wherein the aminophenol comprises 2-aminophenol, 3-aminophenol, and/or 4-aminophenol.
7. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel consists of the polymerization product of formaldehyde and the at least one nitrogen-containing resorcinol analog.
8. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a nitrogen content of about 4 wt. % or more.
9. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a nitrogen content of about 8 wt. % or more.
10. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a surface area of about 100 m 2 /g or more.
11. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a surface area of about 300 m 2 /g or more.
12. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a density of about 0.5 g/ml or less.
13. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a density of about 0.3 g/ml or less.
14. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a specific capacitance of about 50 F/g or more.
15. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has a specific capacitance of about 80 F/g or more.
16. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has an areal capacitance of about 20 μF/cm 2 or more.
17. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel has an areal capacitance of about 25 μF/cm 2 or more.
18. The composition of claim 1 , wherein the nitrogen-doped carbon aerogel is in a form of a monolith having at least one dimension of 100 microns or more.
19. A supercapacitor comprising the composition of claim 1 .