POSITIVE ACTIVE MATERIAL, POSITIVE ELECTRODE AND LITHIUM BATTERY INCLUDING THE POSITIVE ACTIVE MATERIAL, AND METHOD OF MANUFACTURING THE POSITIVE ACTIVE MATERIAL
First Claim
1. A positive active material comprising:
- a positive active material core particle for intercalating and deintercalating lithium ions; and
a coating layer at least partially surrounding the positive active material core particle and comprising a ceramic composite represented by Formula 1;
Li7+aLa3−
bZr2−
cMdO12+e
Formula 1wherein M comprises at least one selected from aluminum (Al), titanium (Ti), scandium (Sc), vanadium (V), yttrium (Y), niobium (Nb), hafnium (Hf), tantalum (Ta), silicon (Si), gallium (Ga), and germanium (Ge), and−
1≦
a≦
1, 0≦
b≦
2, 0≦
c≦
2, 0<
d≦
2, and 0≦
e≦
1.
1 Assignment
0 Petitions
Accused Products
Abstract
A positive active material, a positive electrode and a lithium battery containing the positive active material, and a method of manufacturing the positive active material are disclosed. The positive active material includes: a positive active material core particle for intercalating and deintercalating lithium ions; and a coating layer at least partially surrounding the positive active material core particle and including a ceramic composite represented by Formula 1.
Li7+aLa3−bZr2−cMdO12+e Formula 1
In Formula 1, M comprises at least one selected from aluminum (Al), titanium (Ti), scandium (Sc), vanadium (V), yttrium (Y), niobium (Nb), hafnium (Hf), tantalum (Ta), silicon (Si), gallium (Ga), and germanium (Ge), and −1≦a≦1, 0≦b≦2, 0≦c≦2, 0≦d≦2, and 0≦e≦1.
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Citations
20 Claims
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1. A positive active material comprising:
-
a positive active material core particle for intercalating and deintercalating lithium ions; and a coating layer at least partially surrounding the positive active material core particle and comprising a ceramic composite represented by Formula 1;
Li7+aLa3−
bZr2−
cMdO12+e
Formula 1wherein M comprises at least one selected from aluminum (Al), titanium (Ti), scandium (Sc), vanadium (V), yttrium (Y), niobium (Nb), hafnium (Hf), tantalum (Ta), silicon (Si), gallium (Ga), and germanium (Ge), and −
1≦
a≦
1, 0≦
b≦
2, 0≦
c≦
2, 0<
d≦
2, and 0≦
e≦
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of manufacturing a positive active material, the method comprising:
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preparing a mixed solution comprising a lanthanum (La) precursor, a zirconium (Zr) precursor, and an additive metal M, wherein M comprises at least one selected from Al, Ti, Sc, V, Y, Nb, Hf, Ta, Si, Ga, and Ge; adding a weak acid comprising citric acid, lactic acid, acetic acid, formic acid, oxalic acid, uric acid, or a mixture thereof, to the mixed solution to prepare a coating solution; applying a coating of the coating solution onto a surface of a positive active material core particle capable of intercalating and deintercalating lithium ions; and heat-treating the coating to prepare the positive active material. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification