Positive active material, method of preparing the same, and lithium secondary battery including the same
AssigneeIucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
InventorsYang-Kook SUN, Chong-Seung YOON
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Abstract
Provided is a positive active material in which a compound containing lithium, a transition metal, and oxygen is doped with a doping metal, the positive active material including lithium (Li) layers, in which the lithium layers may include a first lithium layer including only lithium and a second lithium layer in which at least a part of the lithium of the first lithium layer is substituted with a transition metal.
Claims12
A positive active material including lithium, a transition metal, and oxygen, and including lithium (Li) layers and transition metal layers,
- wherein the lithium layers include a first lithium layer including only lithium and a second lithium layer in which at least a part of the lithium of the first lithium layer is regularly substituted with the transition metal,
- the transition metal layer includes a first transition metal layer including only the transition metal, and a second transition metal layer in which at least a part of the first transition metal layer is regularly substituted with lithium, and
- the second lithium layers and the second transition metal layers are alternately and regularly provided.
A positive active material, comprising:
- a first lithium layer in which lithium is regularly arranged;
- and
- a second lithium layer in which lithium and a transition metal are regularly arranged;
- a first transition metal layer in which the transition metal is regularly arranged;
- and
- a second transition metal layer in which the transition metal and lithium are regularly arranged,
- wherein the second lithium layer and the second transition metal layer are alternately provided, and
- as a result of an electron diffraction pattern fora [010] zone axis or a [100] zone axis,
- a first diffraction spot group which corresponds to a lattice formed by the first lithium layer and the first transition metal layer and is formed by aligning one or more diffraction spots having relatively high strength in one direction, and a second diffraction spot group which corresponds to a lattice formed by the second lithium layer and the second transition metal layer and is formed by aligning one or more diffraction spots having relatively lower strength than the strength of the diffraction spot included in the first diffraction spot group in one direction are observed.
-14. (canceled)
Dependencies are inferred from the claim text.