Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/106464
Full metadata record
DC FieldValueLanguage
dc.creatorM. Enterría
dc.creatorM. F. R. Pereira
dc.creatorJ. I. Martins
dc.creatorJ. L. Figueiredo
dc.date.accessioned2019-04-04T23:14:12Z-
dc.date.available2019-04-04T23:14:12Z-
dc.date.issued2015
dc.identifier.issn0008-6223
dc.identifier.othersigarra:103152
dc.identifier.urihttps://hdl.handle.net/10216/106464-
dc.description.abstractHierarchical carbons with different boron contents (from 0.42 to 2.37 wt.%) were prepared by combination of soft-templating and hydrothermal approaches. This newly developed strategy enables adequate control of the chemical state of the boron functionalities in carbon materials since the self-generated pressures favour B-C bond formation. The total content of oxygen increases simultaneously with the boron content, and its speciation is also influenced by the boron chemical state distribution: the presence of C-B-C (BC3 and BC2O) species induces the oxidation of phenols to carbonyls. The electrochemical performance of the prepared carbons was tested in a three-electrode cell configuration (1 M H2SO4) showing good specific capacitances per BET specific surface area (20-36 ÎF/cm2). The presence of boron on the carbon backbone improves both the charge propagation and the pseudocapacitive properties. Nevertheless, the electrochemical properties are only enhanced up to some level of boron doping (around 1.8 wt.%). A two-electrode supercapacitor built with a carbon prepared by a mild hydrothermal synthesis (50 °C during 28 h) delivered energy densities similar to those of commercial activated carbons. This could lead to high volumetric capacitance, since the boron doped carbons present much higher density.
dc.language.isoeng
dc.relationinfo:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/50020/2013- POCI-01-0145-FEDER-006984/Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais/LSRE-LCM
dc.relationinfo:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/PEst-C/EQB/LA0020/2013/PROJECTO ESTRATÉGICO - LA 20 - 2013-2014/LA 20
dc.rightsrestrictedAccess
dc.subjectCiências Tecnológicas, Ciências da engenharia e tecnologias
dc.subjectTechnological sciences, Engineering and technology
dc.titleHydrothermal functionalization of ordered mesoporous carbons: The effect of boron on supercapacitor performance
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.identifier.doi10.1016/j.carbon.2015.08.009
dc.identifier.authenticusP-00G-Q4B
dc.subject.fosCiências da engenharia e tecnologias
dc.subject.fosEngineering and technology
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
103152.pdf
  Restricted Access
1.94 MBAdobe PDF    Request a copy from the Author(s)


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.