# US 2018/0026266 A1 · Positive Active Material For Lithium Secondary Battery, Method For Producing Same, And Lithium Secondary Battery Comprising Same

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- Number: US 2018/0026266 A1
- Document ID: US20180026266A1
- Status: Published application
- Kind: A1
- Application number: 15/547,025
- Filed: 2016-02-01
- Published: 2018-01-25
- Earliest claimed: 2015-01-30
- Assignees: L&F Co., Ltd.
- Applicants: L&F Co., Ltd.
- Inventors: Su An Choi; Ho Jun Jeong; Sang Hoon Jeon; Su Youn Kwon; Ji Sun An; Bong Jun Jeong
- Web page: https://patentgrep.com/patent/US20180026266A1

## CPC

- H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
- C01G 53/504: with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.5, e.g. Li(MzNixCoyMn1-x-y-z)O2 with x ≥ 0.5
- C01G 53/506: with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.8, e.g. Li(MzNixCoyMn1-x-y-z)O2 with x ≥ 0.8
- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 10/052: Li-accumulators
- C01P 2002/60: Compounds characterised by their crystallite size
- C01P 2004/50: Agglomerated particles
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is a positive active material for a lithium secondary battery, which is a compound capable of reversible intercalation and deintercalation of lithium and having secondary particles formed by the aggregation of primary particles, wherein the size of crystal grains is between 0.0593 and 0.0610 μm at a (003) peak in the spectrum analysis of X-ray diffraction analysis.

## Claims

### Claim 1

A positive active material for a lithium secondary battery, comprising
a compound capable of reversible intercalation and deintercalation of lithium, wherein primary particles are aggregated into secondary particles, and
the size of crystal grains is between 0.0593 and 0.0610 μm at a (003) peak in the spectrum analysis of X-ray diffraction analysis.

### Claim 2 (depends on 1)

The positive active material for a lithium secondary battery of claim 1, wherein the compound having the secondary particles formed by the aggregation of primary particles is a nickel composite oxide.

### Claim 3 (depends on 1)

The positive active material for a lithium secondary battery of claim 1, wherein the compound being capable of intercalating and deintercallating lithium is represented by Chemical Formula 1, Li[LizA(1-z-a)Da]EbO2-b
(wherein, in Chemical Formula 1, A=NiαCoβMnγ, D is one or more element selected from the group consisting of Mg, Al, B, Zr, and Ti, E is one or more element selected from the group consisting of P, F, and S, −0.05≦z≦0.1, 0≦a≦0.05, 0≦b≦0.05, 0.6≦α≦0.81, 0.10≦β≦0.20, and 0.10≦γ≦0.20).

### Claim 4 (depends on 1)

The positive active material for a lithium secondary battery of claim 1, wherein the compound has a strain % of 8 to 20% in the spectrum analysis of X-ray diffraction analysis.

### Claim 5 (depends on 1)

The positive active material for a lithium secondary battery of claim 1, wherein the compound is LiNi0.80Co0.10Mn0.10O2 as a nickel composite oxide.

### Claim 6 (depends on 1)

The positive active material for a lithium secondary battery of claim 1, wherein the compound is LiNi0.70Co0.15Mn0.15O2 as a nickel composite oxide.

### Claim 7

A method of producing a positive active material for a lithium secondary battery, comprising
preparing a nickel composite hydroxide; and a lithium supplying material to prepare a mixture; and
heat-treating the prepared mixture under an oxygen and/or air atmosphere to obtain a compound of Chemical Formula 1, Li[LizA(1-z-a)Da]EbO2-b
(wherein, in Chemical Formula 1, A=NiαCoβMnγ, D is one or more element selected from the group consisting of Mg, Al, B, Zr, and Ti, E is one or more element selected from the group consisting of P, F, and S, −0.05≦z≦0.1, 0≦a≦0.05, 0≦b≦0.05, 0.6≦α≦0.81, 0.10≦β≦0.20, and 0.10≦γ≦0.20).

### Claim 8 (depends on 7)

The method of producing a positive active material for a lithium secondary battery of claim 7, wherein in the step of heat-treating the mixture under the oxygen and/or air atmosphere to obtain the compound of Chemical Formula 1, Li[LizA(1-z-a)Da]EbO2-b
the heat-treating temperature is 700 to 950° C.
(wherein, in Chemical Formula 1, A=NiαCoβMnγ, D is one or more element selected from the group consisting of Mg, Al, B, Zr, and Ti, E is one or more element selected from the group consisting of P, F, and S, −0.05≦z≦0.1, 0≦a≦0.05, 0≦b≦0.05, 0.6≦α≦0.81, 0.10≦β≦0.20, and 0.10≦γ≦0.20).

### Claim 9 (depends on 7)

The method of producing a positive active material for a lithium secondary battery of claim 7, wherein in the heat-treating under the oxygen and/or air atmosphere, a ratio of oxygen and air in a first temperature section and a second temperature section of a temperature-increasing section is 25:75 to 35:65.

### Claim 10 (depends on 7)

The method of producing a positive active material for a lithium secondary battery of claim 7, wherein in the heat-treating under the oxygen and/or air atmosphere, a ratio of oxygen and air in a first temperature section and a second temperature section of a temperature-increasing section is 25:75 to 35:65,
a third temperature section and a fourth temperature section of the temperature-increasing section is under an oxygen atmosphere, and
a ratio of oxygen and air of a temperature maintenance section of the heat-treating is 25:75 to 35:65.

### Claim 11 (depends on 7)

The method of producing a positive active material for a lithium secondary battery of claim 7, wherein in the entire section in the heat-treating under the oxygen and/or air atmosphere, a ratio of oxygen and air is 65:35 to 75:25.

### Claim 12 (depends on 1)

A lithium secondary battery, comprising
a positive electrode for lithium secondary battery including a positive active material of claim 1;
a negative electrode including a negative active material; and
an electrolyte.