# US 11,306,005 B2 · Method for preparing nickel oxide nanoparticles and nickel oxide nanoparticles produced by using the same

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- Number: US 11,306,005 B2
- Document ID: US11306005B2
- Status: Granted
- Kind: B2
- Application number: 16/627,201
- Filed: 2018-06-28
- Published: 2020-07-16
- Granted: 2022-04-19
- Earliest claimed: 2017-06-30
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Won Bae Byun; Eun Kyu Seong; Myoung Hwan Oh
- Web page: https://patentgrep.com/patent/US11306005B2

## CPC

- C01G 53/04: Oxides
- B22F 1/07: Metallic powder characterised by particles having a nanoscale microstructure (nanosized particles B22F1/054)
- B22F 1/142: Thermal or thermo-mechanical treatment
- B22F 2302/25: Oxide
- B22F 2304/056: Particle size above 100 nm up to 300 nm
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2004/03: obtained by SEM
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01P 2006/12: Surface area
- 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)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

A method for producing nickel oxide nanoparticles and nickel oxide nanoparticles produced by using the same.

## Claims

### Claim 1

A method for producing nickel oxide nanoparticles, the method comprising:
preparing a Ni(OH)2 powder and a KOH powder;
forming a mixed powder by mixing the Ni(OH)2 powder with the KOH powder; and
heat-treating the mixed powder at a temperature of 90° C. to 200° C.

### Claim 2 (depends on 1)

The method of claim 1, wherein a molar ratio of the Ni(OH)2 powder to the KOH powder in the mixed powder is 1:1.6 to 1:3.

### Claim 3 (depends on 1)

The method of claim 1, wherein a specific surface area of the Ni(OH)2 powder is 0.01 m2/g to 200 m2/g and a specific surface area of the KOH powder is 0.01 m2/g to 200 m2/g.

### Claim 4 (depends on 1)

The method of claim 1, wherein the heat-treating of the mixed powder is carried out under an atmosphere of normal humidity and normal pressure.

### Claim 5 (depends on 1)

The method of claim 1, wherein the nickel oxide nanoparticles have an average particle diameter of 5 nm to 50 nm.

### Claim 6 (depends on 1)

The method of claim 1, wherein the nickel oxide nanoparticles have a specific surface area of 100 m2/g or more.

### Claim 7 (depends on 1)

The method of claim 1, wherein a content of hydroxide in the nickel oxide nanoparticles is less than 0.1 wt %.