Electrode material including a lithium/transition metal...

Details Electrode material including a lithium/transition metal... Electrode material including a lithium/transition metal...

H - Electricity

01

M

H01M 4/04 (2006.01) H01M 4/48 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2607059

The invention relates to an electrode material and a composite electrode including same. The electrode material consists of particles or particulate aggregates of a complex LiiMmM'm'ZzOoNnFf oxide, wherein M is at least one transition metal, M' is at least one metal other than a transition metal; Z is at least one non-metal; coefficients i, m, m', z, o, n and f are selected in such a way that the complex oxide is electrically neutral, with i = 0, m > 0, z = 0, m' =0, o > 0, n = 0 and f = 0. At least part of the complex oxide particle or particulate aggregate surface is coated with a carbon layer bound by chemical bonds and/or physical bonds to the carbon. The complex oxide has formula; the carbon has covalently bonded functional GF groups.

L'invention concerne un matériau d'électrode et une électrode composite comprenant ledit matériau. Le matériau d'électrode est constitué par des particules ou des agrégats de particules d'oxyde complexe (3) LiiMmM~m~ZzOoNnFf. M représente au moins un élément métal de transition, M' représente au moins un métal autre qu'un métal de transition ; Z représente au moins un non métal ; les coefficients i, m, m', z, o, n et f sont choisis de manière à assurer l'électroneutralité de l'oxyde complexe, avec i >= 0, m > 0, z >= 0, m~ >= 0, o > 0, n >= 0 et f >= 0. Au moins une partie de la surface des particules ou des agrégats de particules d'oxyde complexe est revêtue par une couche de carbone (5) fixée par des liaisons chimiques et/ou des liaisons physiques au carbone. L'oxyde complexe répond à la formule ; le carbone porte des groupes fonctionnels GF fixés par liaison covalente.

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