Tuning the discharge potential of fluorinated carbon used as electrode in primary lithium battery - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Electrochimica Acta Année : 2012

Tuning the discharge potential of fluorinated carbon used as electrode in primary lithium battery

Marc Dubois
  • Fonction : Auteur correspondant
  • PersonId : 923103

Connectez-vous pour contacter l'auteur
MI
Katia Guérin
MI
W. Zhang
MI
André Hamwi
  • Fonction : Auteur
MI

Résumé

When the carbon lattice of the starting material exhibits a curvature as in the case of fullerenes and derivatives, the C-F bonding in the compounds resulting from the fluorination using molecular fluorine is strongly affected and the covalence is significantly weakened. 19F solid state NMR underlines that the higher the curvature the lower the C-F bonding covalence is. The electrochemical discharge potentials of these materials used as electrode in primary lithium batteries can be then tuned according to the curvature, i.e. the diameter of the outer tubes. The potential decreases from 2.9 to 2.3 V versus Li+/Li° according to the following classification: SWCNTs, MWCNTs and carbon nanofibres, which can be described as MWCNTs with large diameter due to the high number of walls. The case of highly fluorinated fullerenes is different because several types of bonding coexist and are progressively broken during the electrochemical process at potentials ranged in between 2.0 and 3.6 V. The behaviour of fluorinated nanocarbons is also compared to conventional graphite fluorides
Fichier non déposé

Dates et versions

hal-00683666 , version 1 (29-03-2012)

Identifiants

  • HAL Id : hal-00683666 , version 1

Citer

Marc Dubois, Katia Guérin, W. Zhang, André Hamwi, Yasser Ahmad, et al.. Tuning the discharge potential of fluorinated carbon used as electrode in primary lithium battery. Electrochimica Acta, 2012, 59, pp.485-491. ⟨hal-00683666⟩
77 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More