Influence of the surface-chemistry of modified mesoporous carbon on the electrochemical behaviour of solid-state supercapacitors (Articolo in rivista)

Type
Label
  • Influence of the surface-chemistry of modified mesoporous carbon on the electrochemical behaviour of solid-state supercapacitors (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/ef901447y (literal)
Alternative label
  • Lufrano, F. ; Staiti, P. (2010)
    Influence of the surface-chemistry of modified mesoporous carbon on the electrochemical behaviour of solid-state supercapacitors
    in Energy & fuels (Print); American Chemical Society, Washington (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lufrano, F. ; Staiti, P. (literal)
Pagina inizio
  • 3313 (literal)
Pagina fine
  • 3320 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 24 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Note
  • Google Scholar (literal)
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ITAE, Consiglio Nazionale delle Ricerche--Istituto di Tecnologie Avanzate per l'Energia \"Nicola Giordano\" Via Salita S. Lucia sopra Contesse, 5, 98126 Messina, Italy (literal)
Titolo
  • Influence of the surface-chemistry of modified mesoporous carbon on the electrochemical behaviour of solid-state supercapacitors (literal)
Abstract
  • This paper reports on the synthesis of the mesoporous CMK-3 carbon carried out using the SBA-15 silica as a template and its chemical modification by nitric acid treatment at room temperature. The nitric-acidmodified carbon, CMK-3AN, was used to prepare other carbon samples by thermal treatments at 700 and 900 ?C, which modify the surface properties of carbons by a partial removal of oxygenated surface groups. A series of composite electrodes was prepared from modified and unmodified carbons and used as the active material for solid-state supercapacitors. The electrochemical study carried out in two electrode configurations showed that the insertion of oxygen-containing functional groups in template carbon imparted changing on the capacitance features, enhancing also the electrode/electrolyte interface. However, the one disadvantage of acid treatment was that the carbon and electrodes showed a slight higher electronic resistance. The nitric-acid-modified carbon electrodes (CMK-3AN) showed better capacitive performances (162 F g-1; on the basis of the weight of the active carbon materials for one electrode) than those of the untreated CMK-3 carbon (132 F g-1) and much higher values than the carbon samples treated at 700 ?C (CMK-3AN7) and 900 ?C (CMK-3AN9), which showed values of 82 and 49 F g-1, respectively. The high total capacitance of the former carbon originates from its higher pseudocapacitance, which derived from the presence of electrochemically active oxygen-containing functional groups. These groups were partially eliminated during the thermal treatments at 700 and 900 ?C. As a consequence to this, the supercapacitor using the carbon treated at the highest temperature (CMK-3AN9) showed a specific capacitance of about 250% lower than that with the nitric-acid-treated carbon (CMK-3AN). (literal)
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