Patent ID: 11881583
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A positive electrode active material comprising:
a doped lithium nickel phosphate having an olivine structure comprising distorted NiO6 octahedra,
wherein the dopant is a combination of at least two transition metals having different ionic radii, and the doped lithium nickel phosphate is a compound of Formula 1

Li1+x(2−p)+y(2−q)M1xpM2yqNi1-x-yPO4  Formula 1

wherein
M1 is a transition metal having an oxidation state p, wherein p is +1, +2, +3, or +4;
M2 is a transition metal having an oxidation state q, wherein q is +1, +2, +3, or +4,
0<x≤0.25;
0<y≤0.25; and
M1 has an ionic radius that is not equal to M2; or

wherein the dopant is an anion and the doped lithium nickel phosphate is a compound of Formula 2

Li1-z(3+w)NiAzw(PO4)1-z  Formula 2

wherein
A is the anion dopant having an oxidation state w of −1, −2, −3 or −4; and
0<z≤0.25; or

wherein the dopant is an anion and the doped lithium nickel phosphate is a compound of Formula 3

Li1-n(2+w)NiP(O1-nXnw)4  Formula 3

wherein
X is a halide, a chalcogenide, a nitride, or a combination thereof, wherein X has an oxidation state w of −1, −2, or −3; and
0<n≤0.25, or
wherein the dopant is an anion and a metal cation and the doped lithium nickel phosphate is a compound of Formula 4

Li1+x(2−p)−z(3+w)M1xpNi1-xAzw(PO4)1-z  Formula 4

wherein
M1 is a transition metal having an oxidation state p, wherein p is +1, +2, +3, or +4;
A is a dopant having an oxidation state w of −1, −2, −3, or −4;
0<z≤0.25; and
0<x≤0.25; or

wherein the dopant is an anion and a metal cation and the doped lithium nickel phosphate is a compound of Formula 5

Li1+x(2−p)−n(2+w)M1xpNi1-xP(O1-nXnw)4  Formula 5

wherein
M1 is a transition metal having an oxidation state p, wherein p is +1, +2, +3, or +4;
X is a halide, a chalcogenide, a nitride, or a combination thereof, wherein X has an oxidation state w of −1, −2, or −3;
0<n≤0.25; and
0<x≤0.25.