| CPC H01M 4/525 (2013.01) [H01M 4/362 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2250/30 (2013.01)] | 6 Claims |
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1. A cathode active material comprising:
a lithium composite oxide particle having the form of a secondary particle in which a plurality of primary particles are aggregated, wherein the plurality of primary particles respectively include a lithium conduction pathway through which lithium ions are diffused,
wherein the plurality of primary particles include a plurality of first particles, and each of the plurality of first particles has a hexagonal crystal structure and an angle of 45° to 90° formed by a direction from a center of each of the plurality of first particles to a center of the lithium composite oxide particle and a direction of the lithium conduction pathway included in the plurality of first particles,
wherein a ratio of the number of the plurality of first particles among the plurality of primary particles located on a surface of the lithium composite oxide particle is 20% or more,
wherein the plurality of primary particles include a plurality of second particles, and each of the plurality of second particles has a hexagonal crystal structure and an angle of less than 45° formed by a direction from a center of each of the plurality of second particles to a center of the lithium composite oxide particle and a direction of the lithium conduction pathway included in the plurality of second particles and
wherein the plurality of primary particles only include the plurality of first particles and the plurality of second particles,
wherein the lithium conduction pathway is formed in an ab-axis direction of the hexagonal crystal structure.
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