Li-ni composite oxide particles for non-aqueous electrolyte...

H - Electricity – 01 – M

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Details

H01M 4/52 (2006.01) H01M 4/36 (2006.01) H01M 4/50 (2006.01)

Patent

CA 2680192

Disclosed is a Li-Ni complex oxide particle powder for nonaqueous electrolyte secondary batteries, which has high charge/discharge capacity while being excellent in thermal stability during charging. Specifically disclosed is a Li-Ni complex oxide particle powder for nonaqueous electrolyte secondary batteries, wherein a secondary particle as the nucleus has a composition represented by: Lix1Ni1-y1-z1-w1Coy1Mnz1Mw1O2 (wherein 0.9 <= x1 <= 1.3, 0.1 <= y1 <= 0.3, 0.0 <= z1 <= 0.3, 0 <= w1 <= 0.1, and M represents at least one metal selected from Al and Fe), and an Li-Ni complex oxide having a composition represented by: Lix2Ni1-y2-z2-w2Coy2Mnz2Mw2O2 (wherein 0.9 <= x2 <= 1 + z2, 0 <= y2 <= 0.33, 0 <= z2 <= 0.5, 0 <= w2 <= 0.1, and M represents at least one metal selected from Al, Fe, Mg, Zr and Ti) covers or is present on the surface of the particle.

L'invention concerne une poudre de particules d'oxyde complexe Li-Ni (lithium-nickel) pour batteries secondaires électrolytiques non aqueuses, comportant une capacité de charge/décharge élevée tout en présentant une excellente stabilité thermique pendant le chargement. L'invention décrit en particulier une poudre de particules d'oxyde complexe Li-Ni pour batteries secondaires électrolytiques non aqueuses, dont une particule secondaire comme le noyau comporte une composition représentée par : Lix1Ni1-y1-z1-w1Coy1Mnz1Mw1O2 (0,9 <= x1 <= 1,3, 0,1 <= y1 <= 0,3, 0,0 <= z1 <= 0,3, 0<= w1 <= 0,1, et M représentant au moins un métal sélectionné parmi Al et Fe), et un oxyde complexe Li-Ni ayant une composition représentée par : Lix2Ni1-y2-z2-w2Coy2Mnz2Mw2O2 (0,9 <= x2 <= 1 + z2, 0 <= y2 <= 0,33, 0 <= z2 <= 0,5, 0 <= w2 <= 0,1, et M représentant au moins un métal sélectionné parmi Al, Fe, Mg, Zr et Ti) couvre ou est présent à la surface de la particule.

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