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-10355275-B2
Application number	US-201414906488-A
Country	US
Kind code	B2
Filing date	Aug 18, 2014
Priority date	Aug 20, 2013
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

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 method of preparing a transition metal precursor comprising:
preparing an aqueous transition metal solution comprising a transition metal-containing salt for preparing a precursor having a first anion;
mixing a second anion selected from the group consisting of PO 4 , BO 3 , CO 3 , F and NO 3 and a reducing agent with the aqueous transition metal solution to substitute anion sites of the precursor; and
co-precipitating by adding a strong base after the mixing to form the transition metal precursor having a composition represented by Formula 1 below:
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;
wherein the reducing agent is a sugar-based material; and
wherein the transition metal-containing salt consists of a transition metal cation and the first anion.

2. The method according to claim 1 , wherein the reducing agent has a concentration of 2.0 to 7.0 mol % based on a molar amount of the aqueous transition metal solution.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• C01G45/1257

  containing lithium, e.g. Li2MnO3 or Li2(MxMn1-x)O3 · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01G51/56

  of the type (MnO3)2-, e.g. Li2(CoxMn1-x)O3 or Li2(MyCoxMn1-x-y)O3 · CPC title