Physical characteristics and rate performance of (CF_x)_n (0.33

P. Lam (1) , Rachid Yazami (2)

1 ARI - Astrophysics Research Institute [Liverpool]
2 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces

Sub-fluorinated graphite fluorides (CFx)_n compounds, 0.33 < x < 0.63 were prepared from natural graphite and characterized by TGA, SEM-EDX and XRD. Their cathode behavior in lithium batteries was investigated under different discharge rates and compared to commercial petroleum coke based (CF)_n. At low discharge rate, the energy density increases with the fluorine content x. However, at higher rates, sub-fluorinated compounds performed better than commercial (CF)_n. The result is discussed with relation to higher electrical conductivity of sub-fluorinated compounds.

Mots clés: Graphite fluoride; Fluorinated carbon; Rate capability; Lithium batteries

Domaines: Matériaux

P. Lam, Rachid Yazami. Physical characteristics and rate performance of (CF_x)_n (0.33. Journal of Power Sources, 2006, 152 (2), pp. 354-359. ⟨10.1016/j.jpowsour.2005.05.022⟩. ⟨hal-00386396⟩