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

Preparation method of 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material

A bimetallic oxide and composite material technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of high energy consumption, long cycle, complicated operation, etc., and achieve the effect of high activity, simple operation, and increased contact area

Inactive Publication Date: 2019-01-04
CENT SOUTH UNIV
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is complex in operation, long in cycle, high in energy consumption, uses a variety of strong oxidants, and is prone to environmental problems

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
  • Preparation method of 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material
  • Preparation method of 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material
  • Preparation method of 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1) ultrasonically mix 1 g of multi-walled carbon nanotubes with 80 mL of 40% concentrated nitric acid, treat in an oil bath at 110°C for 2 hours, filter, wash the resulting filter residue with deionized and absolute ethanol until neutral, and dry at 60°C to obtain Acidified multi-walled carbon nanotubes-WMCNT;

[0046] 2) Prepare cobalt nitrate and nickel nitrate in a molar ratio of 2:1 to an ethanol-water solution with a total metal ion concentration of 0.045 mol / L (the volume ratio of ethanol and water is 1:1), according to NiCo 2 o 4 Add 20% of the theoretical mass of the acidified multi-walled carbon nanotube-WMCNT prepared in step 1), after stirring evenly, add a certain amount of urea, adjust the pH to about 11.0, and obtain a black uniform mixed solution;

[0047] 3) Transfer the black homogeneous mixed solution obtained in step 2) into a hydrothermal kettle with a filling rate of 70%, keep it warm at 110°C for 16h, after cooling at room temperature, filter, add...

Embodiment 2

[0050] 1) ultrasonically mix 1 g of multi-walled carbon nanotubes with 50 mL of 50% concentrated nitric acid, treat in an oil bath at 80°C for 3 hours, filter, wash the resulting filter residue with deionized and absolute ethanol until neutral, and dry at 60°C to obtain Acidified multi-walled carbon nanotubes-WMCNT;

[0051] 2) Prepare cobalt nitrate and nickel nitrate in a molar ratio of 2:1 to an aqueous solution with a total metal ion concentration of 0.075mol / L, according to NiCo 2 o 4 10% of the theoretical product quality, add the acidified multi-walled carbon nanotube-WMCNT prepared in step 1), after stirring evenly, add ammonia water dropwise, adjust the pH to about 11.0, and obtain a black uniform mixed solution;

[0052] 3) Transfer the black homogeneous mixed solution obtained in step 2) into a hydrothermal kettle with a filling rate of 70%, heat it at 120° C. for 7 hours, and after cooling at room temperature, filter, add deionized water and absolute ethanol, and ...

Embodiment 3

[0055] 1) ultrasonically mix 1 g of multi-walled carbon nanotubes with 40 mL of 60% concentrated nitric acid, treat in an oil bath at 110 ° C for 1.0 h, filter, and wash the obtained filter residue with deionized and absolute ethanol until neutral, then dry at 60 ° C, Obtain acidified multi-walled carbon nanotube-WMCNT;

[0056] 2) Prepare cobalt acetate and nickel acetate in a molar ratio of 2:1 to an ethanol solution with a total metal ion concentration of 0.09 mol / L, according to NiCo 2 o 4 15% of the theoretical product mass, add the acidified multi-walled carbon nanotube-WMCNT prepared in step 1), after stirring evenly, add ammonia water and urea, adjust the pH to about 11.0, and obtain a black uniform mixed solution.

[0057] 3) Transfer the black homogeneous mixed solution obtained in step 2) into a hydrothermal kettle with a filling rate of 70%, keep it warm at 120°C for 12h, and after cooling at room temperature, filter, add deionized water and absolute ethanol, and ...

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
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material, comprising the following steps: 1) multi-wall carbon nanotubesand concentrated nitric acid are ultrasonically mixed evenly, processed by an oil bath, filtered, washed and dried to obtain acidified multi-wall carbon nanotubes; 2) prepare metal ion solution, adding acidify multi-wall carbon nanotubes, uniformly stirring, dropping acid-base regulator to adjust pH to obtain mixed solution; 3) transfer that mixed solution into a hydrothermal kettle, heat preservation to complete the reaction, cooling, filtering, washing, dry and grinding to obtain a composite material precursor; 4) that composite precursor is place in an air atmosphere and subjected to low-temperature pyrolysis treatment to obtain a 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material. The composite material prepared by the invention is applied in the zinc-air battery and exhibits excellent catalytic performance, so that the battery not only has high energy efficiency, but also has large power density, current density and specific capacity.

Description

technical field [0001] The invention relates to the technical field of bifunctional catalysts for zinc-air batteries, in particular to a method for preparing a 3D sea urchin spherical carbon-based nickel-cobalt double metal oxide composite material. Background technique [0002] With the rapid development of the economy, the environmental problems caused by the wide application of fossil energy are becoming more and more serious, and the development of clean new energy has become a top priority. Among the many types of energy storage and conversion, electrochemical energy conversion and storage technologies (mainly including metal-air batteries, fuel cells, supercapacitors, electrolyzed water, etc.) have been recognized as one of the most feasible and effective energy conversion and storage methods. Especially in recent years, rechargeable metal-air batteries have attracted a lot of attention from scholars because of their low cost, environmental friendliness, high energy de...

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
IPC IPC(8): H01M4/90
CPCH01M4/90H01M4/9016H01M4/9083Y02E60/50
Inventor 王接喜肖晓李新海颜果春王志兴郭华军胡启阳彭文杰柴作强
Owner CENT SOUTH UNIV
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