Carbon fibre electrodes for secondary battery

Details Carbon fibre electrodes for secondary battery Carbon fibre electrodes for secondary battery

H - Electricity

01

M

H01M 4/58 (2006.01)

Patent

CA 2312378

The invention concerns carbon fibres with average inter-reticular distance (d002) at least equal to 0.36 nm, preferably 0.38 nm, having a crystallite size such that the average height (Lc) ranges between 0.7 nm and 3 nm and the average lateral dimension (La) ranges between 2 nm and 6 nm, and having a total porosity ranging between 10 % and 30 %. The electrode is preferably a carbon tissue with rayon precursor and constitutes a secondary battery anode (10) with a cathode (20) which comprises lithium, for inserting and removing lithium ions, and an electrolyte (30).

Le carbone des fibres présente une distance inter-réticulaire moyenne (d¿002?) au moins égale à 0,36 nm, de préférence 0,38 nm, a une taille de cristallite telle que la hauteur moyenne (L¿c?) est comprise entre 0,7 nm et 3 nm et la dimension latérale moyenne (L¿a?) est comprise entre 2 nm et 6 nm, et présente une porosité totale comprise entre 10 % et 30 %. L'électrode est de préférence en tissu de carbone à précurseur rayonne et constitue une anode (10) d'une batterie secondaire ayant une cathode (20) qui comprend du lithium, permettant l'insertion et la désinsertion d'ions lithium, et un électrolyte (30).

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