EDLC electrodes from cellulose-based carbon aerogels : influence of the carbon surface chemistry - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2009

EDLC electrodes from cellulose-based carbon aerogels : influence of the carbon surface chemistry

(1) , (1) , (1) , (2) , (1) , (1)
1
2
Bartosz Grzyb
  • Fonction : Auteur
  • PersonId : 762755
  • IdRef : 086287842
Nathalie Job
  • Fonction : Auteur
  • PersonId : 843267
Arnaud Rigacci
Patrick Achard

Résumé

This work investigates the influence of the carbon surface chemistry on the carbon's electrochemical performance if used as EDLC electrode material. Carbon aerogels were synthesized by crosslinking cellulose acetate through a non-toxic isocyanate and subsequent drying in supercritical CO2 and pyrolysis in inert atmosphere (1000°C, nitrogen atmosphere). Subsequently, the surface chemistry of the carbon aerogels was modified by oxidation (in H2O2) or by nitrogen introduction (impregnation with melamine and co-pyrolysis). Thus the carbon material's surface chemistry was modified depending on the modification method, while the morphology remained similar. All carbon samples were analyzed in terms of morphology (by nitrogen adsorption and mercury porosimetry), composition (elemental analysis), and surface chemistry (Boehm titration and pHPZC). For electrochemical analysis, carbon aerogels were tested in the form of EDLC electrodes in a symmetric test assembly in aqueous electrolyte (cyclic voltammetry and galvanostatic cycling). Results show that the carbon's capacitance can be increased by the introduction of heteroatoms. However, the type of functional groups present on the carbon surface seems to really determine capacitance as opposed to the mere presence of oxygen or nitrogen atoms.
Fichier principal
Vignette du fichier
Hildenbrand_274.pdf (264.37 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00490240 , version 1 (16-06-2010)

Identifiants

  • HAL Id : hal-00490240 , version 1

Citer

Claudia Hildenbrand, Bartosz Grzyb, Sandrine Berthon-Fabry, Nathalie Job, Arnaud Rigacci, et al.. EDLC electrodes from cellulose-based carbon aerogels : influence of the carbon surface chemistry. International Carbon Conference 2009, Jun 2009, Biarritz, France. http://hdl.handle.net/2268/12363. ⟨hal-00490240⟩
241 Consultations
740 Téléchargements

Partager

Gmail Facebook Twitter LinkedIn More