Tungsten-doped lithium manganese iron phosphate-based particulate and tungsten-doped lithium manganese iron phosphate-based powdery material including the same
Disclosed is a tungsten-doped lithium manganese iron phosphate-based particulate for a cathode of a lithium-ion battery. The particulates include a composition represented by a formula of Li x Mn 0.998-y-z Fe y M z W 0.002 P a O 4a±p /C, wherein x, y, z, a, p, and M are as defined herein. Also disclosed is a powdery material including the particulates, and a method for preparing the powdery material.
1. A tungsten-doped lithium manganese iron phosphate-based particulate for a cathode of a lithium-ion battery, comprising a composition represented by the following formula:
Li x Mn 0.998-y-z Fe y M z W 0.002 P a O 4a±p /C,
wherein
M is a metal combination that includes Mg and Ti;
P 0.9≤x≤1.2;
0.1≤y≤0.4;
0≤z≤0.08;
0.1≤y+z≤0.48;
0.85≤a≤1.15;
0<p<0.1; and
C is in an amount of larger than 0 wt % and up to 3.0 wt % based on a total weight of the composition.
2. The tungsten-doped lithium manganese iron phosphate-based particulate according to claim 1 , wherein said metal combination of M further includes Co.
3. A tungsten-doped lithium manganese iron phosphate-based powdery material for a cathode of a lithium-ion battery, comprising the tungsten-doped lithium manganese iron phosphate-based particulate according to claim 1 .
4. The tungsten-doped lithium manganese iron phosphate-based powdery material according to claim 3 , having a specific surface area ranging from 0.5 m 2 /g to 20 m 2 /g.