C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 25/45 (2006.01) H01M 10/052 (2010.01) H01M 10/0566 (2010.01) H01M 4/36 (2006.01) H01M 4/58 (2010.01)
Patent
CA 2741406
There is disclosed a multi-component system lithium phosphate compound particles having an olivine structure and represented by a general formula of Li Y M1 1-Z M2 Z PO4 in which M1 is one metal element selected from the group consisting of Fe, Mn and Co, Y is a number satisfying a formula of 0.9 <= Y <= 1.2, M2 is at least one metal element selected from the group consisting of Mn, Co, Mg, Ti and Al, and Z is an number satisfying a formula of 0 < Z <= 0.1, wherein a concentration of the metal element M2 existing on a surface of the particle is higher than the concentration of that existing in core portion of the particle and that the concentration of the metal element M2 is continuously lowered from the surface of particle to a core portion of the particle.
Linvention concerne des particules dun composé de phosphate de lithium multi-élément ayant une structure olivine, qui sont représentées par la formule générale suivante : LiYM11-ZM2ZPO4 (dans laquelle M1 représente un élément métallique choisi dans un groupe constitué de Fe, Mn et Co ; Y représente un nombre satisfaisant 0,9 = Y = 1,2 ; M2 représente au moins un élément métallique autre que M1 et choisi dans un groupe constitué de Mn, Co, Mg, Ti et Al ; et Z représente un nombre satisfaisant 0 < Z = 0,1). Les particules dun composé de phosphate de lithium multi-élément sont caractérisées en ce que la concentration de lélément métallique M2 dans la surface des particules est supérieure à celle dans le centre des particules, et en ce que la concentration de lélément métallique M2 diminue de manière continue de la surface des particules vers le centre des particules.
Abe Hidetoshi
Eguro Takashi
Kanamura Kiyoshi
Saito Mitsumasa
Suzuki Tomonori
Ridout & Maybee Llp
Sumitomo Osaka Cement Co. Ltd.
The Furukawa Battery Co. Ltd.
Tokyo Metropolitan University
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