Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Micron grade flaky beta-Co(OH)2 (cobalt hydroxide) and green preparation method thereof

A cobalt hydroxide, micron-scale technology, applied in the direction of cobalt oxide/cobalt hydroxide, hybrid capacitor electrodes, etc., can solve the problems of complex reaction factors, expensive equipment, strong alkali corrosion, etc., and achieve a simple and easy preparation method, reduce Good growth rate and stability

Inactive Publication Date: 2018-01-30
SHAANXI UNIV OF SCI & TECH
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain problems in the above-mentioned various synthetic methods for preparing cobalt hydroxide. Among them, the hydrothermal method has problems such as being unsuitable for mass production, expensive equipment, and high energy consumption; the electrodeposition method has poor repeatability and reaction influencing factors. Complexity, many impurities in the product, etc.; the ammonia complexation reaction method often has many synthesis steps, chemical reagents are added, and strong alkalis have problems such as corrosion of synthesis equipment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Micron grade flaky beta-Co(OH)2 (cobalt hydroxide) and green preparation method thereof
  • Micron grade flaky beta-Co(OH)2 (cobalt hydroxide) and green preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] ①At room temperature, dissolve 0.33g of cobalt nitrate hexahydrate in 90mL of deionized water to make cobalt nitrate solution; ②At room temperature, dissolve 0.985g of 2-methylimidazole in 90mL of deionized water to make 2-methylimidazole solution; ③at room temperature and in a stirring state, add 2-methylimidazole solution into cobalt nitrate solution, wherein the stirring speed is 400 rpm; ④at room temperature, continue to stir the mixed solution for 3-6h, centrifuge, and The resulting pink precipitate was washed three times with deionized and centrifuged water, and then vacuum-dried at 60°C for 6 hours to obtain micron-sized sheet-like β-Co(OH) 2 .

[0021] The X-ray diffraction spectrum of embodiment 1 and scanning electron microscope picture are as figure 1 and figure 2 shown. from figure 1 and figure 2 It can be seen that the samples are all pure-phase β-Co(OH)2, in the shape of hexagonal flakes, and the particle size distribution is within 0.4 μm to 2 μm. ...

Embodiment 2

[0023] ①At room temperature, dissolve 0.45g of cobalt nitrate hexahydrate in 90mL of deionized water to make cobalt nitrate solution; ②At room temperature, dissolve 1.2g of 2-methylimidazole in 90mL of deionized water to make 2-methylimidazole solution; ③at room temperature and in a stirring state, add 2-methylimidazole solution into cobalt nitrate solution, wherein the stirring speed is 400 rpm; ④at room temperature, continue to stir the mixed solution for 3-6h, centrifuge, and The resulting pink precipitate was washed three times with deionized and centrifuged water, and then vacuum-dried at 60°C for 6 hours to obtain micron-sized sheet-like β-Co(OH) 2 .

Embodiment 3

[0025] ①At room temperature, dissolve 0.66g of cobalt nitrate hexahydrate in 90mL of deionized water to make cobalt nitrate solution; ②At room temperature, dissolve 1.97g of 2-methylimidazole in 90mL of deionized water to make 2-methylimidazole solution; ③at room temperature and in a stirring state, add 2-methylimidazole solution into cobalt nitrate solution, wherein the stirring speed is 400 rpm; ④at room temperature, continue to stir the mixed solution for 3-6h, centrifuge, and The resulting pink precipitate was washed three times with deionized and centrifuged water, and then vacuum-dried at 60°C for 6 hours to obtain micron-sized sheet-like β-Co(OH) 2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to micron grade flaky beta-Co(OH)2 (cobalt hydroxide) and a green preparation method thereof. Under the stirring condition, a 2-methylimidazole water solution is added into a cobalt source water solution; then, stirring is performed for 3 to 6h at 20 to 50 DEG C; after the reaction is completed, centrifugal separation is performed; de-ionized water is used for washing; finally, drying is performed; the micron grade flaky beta-Co(OH)2 is obtained, wherein the mol ratio of a cobalt source to 2-methylimidazole is (10 to 20) to 1. The micron grade flaky beta-Co(OH)2 materialand the large-scale green preparation method thereof provided by the invention have the advantages that the operation of the whole synthesis process is simple; the cost is low; the stability is high;safety and reliability are realized. The micron grade flaky beta-Co(OH)2 prepared by the method has the grain diameter being 0.4mu m to 2mu m and is in a hexagonal flaky shape, and can be used for a supercapacitor electrode material, and precursors of cobalt metal oxides, sulfides and lithium cobalt oxide materials for lithium ion batteries.

Description

technical field [0001] The invention relates to a micron-sized β-cobalt hydroxide material and a large-scale synthesis method thereof, in particular to a micron-sized flaky β-cobalt hydroxide and a green preparation method thereof. Background technique [0002] Oxides and hydroxides of transition metals have unique chemical and physical properties, and are widely used in energy storage batteries, water pollution treatment, catalytic synthesis, and sensors. β-cobalt hydroxide is an inexpensive and environmentally friendly material that is an important electrochemically active material. For example, when it is used as a supercapacitor electrode, it has a theoretical specific capacity of up to 3670F / g, which is much higher than that of traditional porous carbon materials and conductive polymer materials (100-1000F / g); β-cobalt hydroxide can also be used to prepare traditional cobalt Precursors of metal oxides, sulfides, and lithium cobalt oxide materials for lithium-ion batter...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04H01G11/24H01G11/30
CPCY02E60/13
Inventor 王雷吴海伟王敏杨海波
Owner SHAANXI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com