POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE ACTIVE MATERIAL MANUFACTURED BY USING THEREOF, AND LITHIUM SECONDARY BATTERY INCLUDING SAME

摘要

The present disclosure relates to a positive electrode active material precursor for a lithium secondary battery, a positive electrode active material manufactured by using thereof, and a lithium secondary battery comprising the same. More specifically, it relates to a positive electrode active material precursor for a lithium secondary battery as a secondary particle comprising transition metals, and formed by gathering of a plurality of primary particles having different a-axis direction length to c-axis direction length ratio, wherein the a-axis direction length to c-axis direction length ratio of the primary particle making up the secondary particle is increased from the center to the surface of the secondary particle; a positive electrode active material; and a lithium secondary battery comprising the same.

主权项

1. A positive electrode active material for a lithium secondary battery, which is a secondary particle comprising transition metals and interior sections,
wherein the secondary particle is formed by gathering of a plurality of primary particles, wherein crystal structure of the primary particles has a-axis and c-axis, wherein the a-axis direction is a direction from a center to a surface of the secondary particle, and the c-axis direction is perpendicular to the a-axis direction, wherein at least one of the interior sections of the secondary particle comprises the primary particles having the a-axis direction length to the c-axis direction length rations different from each other, and wherein the a-axis orientation of the primary particle is headed to the center of the secondary particle, and the primary particles are adjoining each other and align with the a-axis direction.