Precursor for preparation of lithium composite transition metal oxide, method for preparing the same and lithium composite transition metal oxide obtained from the same

Patent metadata

Field	Value
Publication number	US-10903489-B2
Application number	US-201916394624-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Aug 20, 2013
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

Disclosed are a precursor for preparation of a lithium composite transition metal oxide, a method for preparing the same and a lithium composite transition metal oxide obtained from the same. More particularly, the transition metal precursor which has a composition represented by Formula 1 below and is prepared in an aqueous transition metal solution, mixed with a transition metal-containing salt, including an alkaline material, the method for preparing the same and the lithium composite transition metal oxide obtained from the same are disclosed.

Mn a M b (OH 1-x ) 2-y A y   (1)
wherein M is at least one selected form the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected form the group consisting of anions of PO 4 , BO 3 , CO 3 , F and NO 3 , and 0.5≤a≤1.0; 0≤b≤0.5; a+b=1; 0<x<1.0; and 0≤y≤0.02.

First claim

The invention claimed is:

1. A transition metal precursor having a composition represented by Formula 1 below,
wherein the transition metal precursor includes a sugar-based material that exists in inner pores of the transition metal precursor:
Mn a M b (OH 1-x ) 2-y A y   (1)

wherein M is Ni and Co;
A is at least one selected from the group consisting of anions of PO 4 , BO 3 , CO 3 , F and NO 3 ;
0.5≤a≤1.0;
0≤b≤0.5;
a+b=1;
0<x<1.0; and
0<y≤0.02.

2. The transition metal precursor according to claim 1 , wherein x is 0.2 or more and less than 0.5.

3. The transition metal precursor according to claim 1 , wherein Mn has a oxidation number of +2 to +3.5.

4. The transition metal precursor according to claim 1 , the sugar-based material is at least one selected from the group consisting of fructose, sucrose, glucose, lactose, maltose, starch, and dextrin.

5. The transition metal precursor according to claim 1 , wherein the transition metal precursor is prepared in an aqueous transition metal solution, mixed with an alkaline material, a transition metal-containing salt having a first anion, a second anion selected from the group consisting of PO 4 , BO 3 , CO 3 , F and NO 3 , and a reducing agent,
wherein the reducing agent is the sugar-based material; and
wherein the transition metal-containing salt consists of a transition metal cation and the first anion.

6. The transition metal precursor according to claim 5 , wherein an amount of the reducing agent is 0.1 to 30 mol % based on a molar amount of the aqueous transition metal solution.

7. The transition metal precursor according to claim 5 , wherein an amount of the reducing agent is 1.0 to 10 mol % based on a molar amount of a transition metal of the aqueous transition metal solution.

8. The transition metal precursor according to claim 5 , wherein the reducing agent has a concentration of 2.0 to 7.0 mol %.

9. The transition metal precursor according to claim 5 , wherein the transition metal-containing salt is at least one selected from the group consisting of sulfates, nitrates and carbonates.

10. The transition metal precursor according to claim 5 , wherein the alkaline material is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide.

11. A lithium composite transition metal oxide prepared using the transition metal precursor according to claim 1 .

12. The lithium composite transition metal oxide according to claim 11 , wherein the lithium composite transition metal oxide is represented by Formula 2 below:
(1- x )LiM′O 2-y A y - x Li 2 MnO 3-y′ A y′   (2)

wherein M′ is Mn a M b ;
M is Ni and Co;
A is at least one selected from the group consisting of anions of PO 4 , BO 3 , CO 3 , F and NO 3 ;
0<x<1;
0<y≤0.02;
0<y′≤0.02;
0.5≤a≤1.0;
0≤b≤0.5; and
a+b=1.

13. The lithium composite transition metal oxide according to claim 12 , wherein the lithium composite transition metal oxide is a solid solution type or composite type.

14. A cathode comprising the lithium composite transition metal oxide according to claim 13 as a cathode active material.

15. A lithium secondary battery comprising the cathode according to claim 14 .

16. A battery module comprising the lithium secondary battery according to claim 15 as a unit battery.

17. A battery pack comprising the battery module according to claim 16 .

18. A device comprising the battery pack according to claim 17 .

19. The device according to claim 18 , wherein the device is an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a system for storing power.

Assignees

• Lg Chemical Ltd

Inventors

• Park Sang Min
• Shin Sun Sik
• Park Byung Chun
• Jeon Hye Lim
• Lee Bo Ram

Classifications

• C01G53/82

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

• C01G51/82

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

• C01G45/22

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

• C01G51/00

  Compounds of cobalt · CPC title

• C01G45/00 Primary

  Compounds of manganese · CPC title