2024-03-29T09:34:11Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1333292018-11-15T11:03:27Zcom_10261_84com_10261_5col_10261_337
2016-06-10T11:57:06Z
urn:hdl:10261/133329
Mesoporous carbons synthesized by direct carbonization of citrate salts for use as high-performance capacitors
Álvarez Ferrero, Guillermo
Sevilla Solís, Marta
Fuertes Arias, Antonio Benito
Ministerio de Economía y Competitividad (España)
A simple one-step synthesis methodology for the fabrication of mesoporous carbons with an excellent performance as supercapacitor electrodes is presented. The procedure is based on the carbonization of non-alkali organic salts such as citrate salts of iron, zinc or calcium. The carbonized products contain numerous inorganic nanoparticles (i.e. Fe, ZnO or CaO) embedded within a carbonaceous matrix. These nanoparticles act as endotemplate, which when removed, leaves a mesoporous network. The resulting carbon samples have a large specific surface area up to ∼1600 m2 g−1 and a porosity made up almost exclusively of mesopores. An appropriate heat-treatment of these materials with melamine allows the synthesis of N-doped carbons which have a high nitrogen content (∼8–9 wt.%), a large specific surface area and retain the mesoporous structure. The mesoporous carbon samples were employed as electrode materials in supercapacitors. They exhibit specific capacitances of 200–240 F g−1 in 1 M H2SO4 and 100–130 F g−1 in EMImTFSI/AN. More importantly, the carbon samples possess a good capacitance retention in both electrolytes (>50% in H2SO4 and >80% in EMImTFSI/AN at 100 A g−1) owing to their mesoporous structure which facilitates the penetration and transportation of ions.
2016-06-10T11:57:06Z
2016-06-10T11:57:06Z
2015-03-12
artículo
Carbon 88: 239-251 (2015)
0008-6223
http://hdl.handle.net/10261/133329
10.1016/j.carbon.2015.03.014
http://dx.doi.org/10.13039/501100003329
eng
Postprint
http://dx.doi.org/10.1016/j.carbon.2015.03.014
Sí
http://creativecommons.org/licenses/by-nc-nd/4.0/
openAccess
Elsevier