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US 2020/0403240 A1Published application
Positive active material, method of preparing the same, and lithium secondary battery including the same
AssigneeIucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
InventorYang-Kook SUN
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Abstract
Provided is a positive active material. The positive active material includes a secondary particle in which a plurality of primary particles is agglomerated, in which a compound containing nickel, lithium, and oxygen is doped with boron,and a concentration of nickel may be 79 mol % or more.
Claims12
A positive active material comprising:
- a secondary particle in which a plurality of primary particles is agglomerated,
- wherein the positive active material is composed of a compound containing nickel, lithium, and oxygen, and
- an average angle between a reference line that is a line connecting a center portion of the secondary particle and a center portion of the primary particle provided at the outermost portion of the secondary particle and a particle orientation line that is a line penetrating the center portion of the primary particle provided at the outermost portion of the secondary particle and extending in parallel to an orientation direction of the primary particles is 12.2° or less. (see FIG. 34 and Table 6)
A positive active material comprising a secondary particle in which a plurality of primary particles is agglomerated,
- wherein the positive active material is composed of a compound containing nickel, lithium, and oxygen,
- a concentration of the nickel in the compound is 59 mol % or more, and
- an average angle between a reference line that is a line connecting a center portion of the secondary particle and a center portion of the primary particle provided at the outermost portion of the secondary particle and a particle orientation line that is a line penetrating the center portion of the primary particle provided at the outermost portion of the secondary particle and extending in parallel to an orientation direction of the primary particles decreases as the concentration of the nickel increases.
-14. (canceled)
Dependencies are inferred from the claim text.