Sugarcane molasses as a pseudocapacitive material for supercapacitors
Sanchez-Sanchez, A. ; de Yuso, A.M. ; Braghiroli, F.L. ; Izquierdo, M.T. ; Alvarez, E.D. ; Perez-Cappe, E. ; Mosqueda, Y. ; Fierro, V. ; Celzard, A.
Resumen: Oxygen-rich carbons were obtained from sugarcane molasses by two methods: direct carbonisation on one hand, and hydrothermal carbonisation and subsequent pyrolysis on the other hand. As no activation treatments were applied, the porous texture was poorly developed and mainly composed of ultramicropores with restricted access to electrolyte ions. Despite this, the directly carbonised molasses exhibited specific capacitances up to 153 F g(-1) at 0.5 mV s(-1) in 1 M H2SO4 electrolyte when tested as electrodes in a three-electrode system. Given the low specific surface areas of the carbons, the capacitance values were mainly assigned to their pseudocapacitance contributions. The latter were more adequately estimated by considering the NLDFT surface area (SNLDFT) than the BET area (ABET) due to the narrow porosity of the materials. Maximum values of pseudocapacitance contribution of 35.2% were attained for the carbon with a SNLDFT of 178 m(2) g(-1), which were explained by the high concentrations of surface oxygen groups, such as quinones and carbonyls.
Idioma: Inglés
DOI: 10.1039/c6ra16314a
Año: 2016
Publicado en: RSC Advances 6, 91 (2016), 88826-88836
ISSN: 2046-2069
Factor impacto JCR: 3.108 (2016)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 59 / 166 = 0.355 (2016) - Q2 - T2
Factor impacto SCIMAGO: 0.889 - Chemistry (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/FEDER/CHEERS
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
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Idioma: Inglés
DOI: 10.1039/c6ra16314a
Año: 2016
Publicado en: RSC Advances 6, 91 (2016), 88826-88836
ISSN: 2046-2069
Factor impacto JCR: 3.108 (2016)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 59 / 166 = 0.355 (2016) - Q2 - T2
Factor impacto SCIMAGO: 0.889 - Chemistry (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/FEDER/CHEERS
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2020-02-21-13:33:35)
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Record created 2018-06-14, last modified 2020-02-21