Process for the preparation of porous lithium-, vanadium and...

C - Chemistry – Metallurgy – 01 – B

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C01B 25/45 (2006.01) H01M 4/58 (2010.01)

Patent

CA 2701144

The present invention relates to a process for the preparation of compounds of general formula (I) : Li a-b M1b V2-c M2c(PO4)x; wherein M1, M2, a, b, c and x have the follow-ing meanings: M1: Na, K, Rb and/or Cs, M2: Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg and/or Sc,a: 1.5 - 4.5, b: 0 - 0.6, c: 0 - 1.98 and x: number to equalize the charge of Li and V and M1 and/or M2, if present, wherein a-b is > 0, to a compound according to general formula (I) as defined above, to spherical agglomerates and/or particles comprising at least one com-pound of general formula (I) as defined above, to the use of such a compound for the prepara-tion of a cathode of a lithium ion battery or an electrochemical cell, and to a cathode for a lithium ion battery, comprising at least one compound as defined above.

La présente invention concerne un procédé de préparation de composés de formule générale (I): Lia-bM1 bV2-cM2 c(PO4)x, dans laquelle M1, M2, a, b, c et x ont les significations suivantes: M1 représente Na, K, Rb et/ou Cs; M2 représente Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg et/ou Sc; a représente 1,5 - 4,5; b représente 0 - 0,6; c représente 0 - 1,98 et x représente le nombre destiné à équilibrer la charge de Li et de V et de M1 et/ou de M2, si présents, a-b étant > 0. L'invention concerne également un composé de formule générale (I) tel que défini ci-dessus; des agglomérats et/ou particules sphériques comprenant au moins un composé de formule générale (I) tel que défini ci-dessus. Elle concerne en outre l'utilisation d'un tel composé pour la préparation d'une cathode d'une batterie au lithium-ion ou d'une cellule électrochimique; et une cathode pour batterie au lithium-ion comprenant au moins un composé de l'invention.

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