Nickel-based active material precursor for lithium secondary battery, method of preparing the same, nickel-based active material for lithium secondary battery formed therefrom, and lithium secondary battery including positive electrode including nickel-based active material

Patent metadata

Field	Value
Publication number	US-11735729-B2
Application number	US-202217817341-A
Country	US
Kind code	B2
Filing date	Aug 3, 2022
Priority date	Oct 16, 2018
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A nickel-based active material precursor includes a particulate structure including a core portion, an intermediate layer portion on the core portion, and a shell portion on the intermediate layer portion, wherein the intermediate layer portion and the shell portion include primary particles radially arranged on the core portion, and each of the core portion and the intermediate layer portion includes a cation or anion different from that of the shell portion. The cation includes at least one selected from boron (B), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), titanium (Ti), vanadium (V), tungsten (W), chromium (Cr), iron (Fe), copper (Cu), zirconium (Zr), and aluminium (Al), and the anion includes at least one selected from phosphate (PO4), BO2, B4O7, B3O5, and F.

First claim

What is claimed is:

1. A nickel-based active material precursor for a lithium secondary battery, the nickel-based active material precursor comprising:
a particulate structure comprising:
a core portion,
an intermediate layer portion on the core portion, and
a shell portion on the intermediate layer portion,

wherein the nickel-based active material precursor comprises nickel (Ni),
wherein each of the core portion and the intermediate layer portion comprises a cation or anion different from that of the shell portion,
wherein the cation comprises at least one selected from boron (B), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), titanium (Ti), vanadium (V), tungsten (W), chromium (Cr), iron (Fe), copper (Cu), zirconium (Zr), and aluminum (Al), and/or the anion comprises at least one selected from phosphate (PO 4 ), BO 2 , B 4 O 7 , B 3 O 5 , and F, and
wherein the shell portion comprises open pores extending from inside of the nickel-based active material precursor to a surface of the nickel-based active material precursor.

2. The nickel-based active material precursor of claim 1 , wherein the intermediate layer portion comprises primary particles radially arranged on the core portion.

3. The nickel-based active material precursor of claim 1 , wherein the shell portion comprises primary particles radially arranged on the core portion and the intermediate layer portion.

4. The nickel-based active material precursor of claim 1 , wherein the particulate structure of the nickel-based active material precursor is a single particulate structure.

5. The nickel-based active material precursor of claim 1 , wherein the shell portion comprises at least one cation selected from B, Mg, Ca, Sr, Ba, Ti, V, W, Cr, Fe, Cu, Zr, and Al.

6. The nickel-based active material precursor of claim 5 , wherein a content of the cation is 0.9 mol % or less with respect to a total amount of the nickel-based active material precursor.

7. The nickel-based active material precursor of claim 1 , wherein the core portion and the intermediate layer portion comprise at least one anion selected from phosphate (PO 4 ), BO 2 , B 4 O 7 , B 3 O 5 , and F.

8. The nickel-based active material precursor of claim 7 , wherein a content of the anion is 0.06 mol % or less with respect to a total amount of the nickel-based active material precursor.

9. The nickel-based active material precursor of claim 1 , wherein the intermediate layer portion and the shell portion are each lower in porosity than the core portion, or the core portion and the shell portion are each higher in porosity than the intermediate layer portion.

10. The nickel-based active material precursor of claim 1 , wherein the nickel-based active material precursor has a mean particle diameter of about 9 μm to about 20 μm.

11. The nickel-based active material precursor of claim 1 , wherein the nickel-based active material precursor comprises plate particles, and wherein major axes of the plate particles are radially arranged.

12. The nickel-based active material precursor of claim 1 , wherein the nickel-based active material precursor is a compound represented by Formula 1 or Formula 2:
Ni 1-x-y-z Co x Mn y M z (OH) 2-α X α ,  Formula 1

Ni 1-x-y-z Co x Al y M z (OH) 2-α X α ,  Formula 2

wherein, in Formulae 1 and 2, M is at least one element selected from B, Mg, Ca, Sr, Ba, Ti, V, W, Cr, Fe, Cu, Zr, and Al,
X is at least one selected from PO 4 , BO 2 , B 4 O 7 , B 3 O 5 , and F,
x≤(1−x−y−z), y≤(1−x−y−z), 0<x<1, 0≤y<1, 0<z≤0.01, and 0<α≤0.01.

13. The nickel-based active material precursor of claim 12 , wherein a content of nickel in the nickel-based active material precursor is in a range of about 33 mol % to about 97 mol % with respect to a total amount of transition metals, and is higher than a content of manganese or aluminium and a content of cobalt.

14. The nickel-based active material precursor of claim 1 , wherein the nickel-based active material precursor is one selected from (Ni 0.6 Co 0.2 Mn 0.2 ) 1-a M a (OH) 2-α X α , (Ni 0.5 Co 0.2 Mn 0.3 ) 1-a M a (OH) 2-α X α , (Ni 0.7 Co 0.15 Mn 0.15 ) 1-a M a (OH) 2-α X α , (Ni 0.85 Co 0.1 Al 0.05 ) 1-a M a (OH) 2-α X α , and (Ni 0.91 Co 0.06 Mn 0.03 ) 1-a M a (OH) 2-α X α ,
wherein 0<a<0.01 and 0<α≤0.01,
M is at least one element selected from B, Mg, Ca, Sr, Ba, Ti, V, W, Cr, Fe, Cu, Zr, and Al, and
X is at least one selected from PO 4 , BO 2 , B 4 O 7 , B 3 O 5 , and F.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Yun Pilsang
• Yang Wooyoung
• Hyun Jangsuk

Classifications

• C01G53/82 Primary

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• H01M4/525 Primary

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• C01G53/006

  Chemistry & Metallurgy · mapped topic

• H01B1/06

  mainly consisting of other non-metallic substances · CPC title

• H01M4/366

  as layered products · CPC title