POSITIVE ACTIVE MATERIAL, LITHIUM BATTERY INCLUDING THE SAME, AND METHOD OF MANUFACTURING THE POSITIVE ACTIVE MATERIAL

摘要

Provided are a positive active material, a lithium battery including the positive active material, and a method of manufacturing the positive active material. The positive active material includes a lithium molybdate composite having a core-shell structure. The lithium molybdate composite acts as a sacrificial positive electrode in a positive electrode of a battery. The positive active material is able to increase charge capacity of a lithium battery, and accordingly is able to improve lifetime properties of a lithium battery.

主权项

1. A positive active material comprising:
a lithium molybdate composite having a core-shell structure, wherein the core comprises lithium molybdate having a first peak at a X-ray diffraction angle 2θ of 20.65±0.1° and a second peak at 2θ of 30.50±0.1°, in an X-ray diffraction (XRD) measurement using a CuKα ray, and the shell comprises an amorphous coating layer comprising Li-M-O—C, wherein M is at least one selected from sodium (Na), potassium (K), cesium (Cs), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), yttrium (Y), lanthanum (La), titanium (Ti), zirconium (Zr), vanadium (V), manganese (Mn), iron (Fe), copper (Co), nickel (Ni), silver (Ag), gold (Au), zinc (Zn), and aluminum (Al).