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US 10,894,723 B2Granted
Metal-doped cobalt precursor for preparing positive electrode active material for secondary battery
AssigneeLG Chem, Ltd.
InventorsChi Ho Jo, Sungbin Park, Jiyoung Park, Bo Ram Lee, Hyuck Hur, Wang Mo Jung
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Abstract
Provided is a cobalt precursor for preparing a lithium cobalt oxide of a layered structure which is included in a positive electrode active material, wherein the cobalt precursor is cobalt oxyhydroxide (CoM′OOH) doped with, as dopants, magnesium (Mg) and M′ different from the magnesium.
Claims7
A cobalt precursor for preparing a lithium cobalt oxide of a layered structure which is included in a positive electrode active material, wherein the cobalt precursor is
- cobalt oxyhydroxide represented by the chemical formula (CoxMgyM′z)OOH,
- wherein x, y, and z satisfy the following weight ratio conditions:
- a content of x is in the range of 99 wt % to 99.8 wt % and a total content of y and z is in the range of 0.2 wt % to 1 wt %, when the sum of x, y, and z is regarded as 100 wt %;
- M′ is one or more selected from the group consisting of Al, Ti, Mn, Zr, Ba, B, Ca, Ta, Mo, Nb, W, Sr and PO4,
- wherein the cobalt precursor is doped with, as dopants, magnesium (Mg) and M′.
2 more elements
Dependencies are inferred from the claim text.