CPC H01M 4/525 (2013.01) [H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] | 10 Claims |
1. A nickel-based active material precursor for a lithium secondary battery comprising:
a secondary particle comprising a plurality of particulate structures, each particulate structure having a radial center,
wherein the secondary particle comprises a plurality of radial centers,
wherein each particulate structure comprises a plurality of primary particles,
wherein each of the particulate structures comprises a porous core portion and a shell portion comprising primary particles radially arranged on the porous core portion, and
wherein, in 50% or more of the primary particles constituting a surface of the secondary particle, a major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle,
wherein a porosity in the porous core portion are larger than the porosity in the shell portion.
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