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

Method of growing porous nickel cobaltate nanosheets based on hollow carbon sphere template

A hollow carbon sphere and nanosheet technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve problems such as lack of preparation methods and single preparation methods, and achieve low equipment requirements and preparation methods. Simple, effect of increasing specific surface area

Inactive Publication Date: 2017-10-17
WUHAN UNIV OF TECH
View PDF7 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation method of nickel cobaltate nanosheets / hollow carbon spheres is single, and the preparation method of one-step sintering to obtain porous nickel cobaltate nanosheets / hollow carbon spheres rich in oxygen vacancies is lacking

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
  • Method of growing porous nickel cobaltate nanosheets based on hollow carbon sphere template
  • Method of growing porous nickel cobaltate nanosheets based on hollow carbon sphere template
  • Method of growing porous nickel cobaltate nanosheets based on hollow carbon sphere template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1, see figure 1 , 2 , 3, 6, 7, 8:

[0047] The invention provides a kind of method based on hollow carbon sphere template growth porous nickel cobalt oxide nanosheet, comprises the following steps (see figure 1 ):

[0048] 1. Synthesis of hollow carbon spheres:

[0049] 1) Mix 20mL of deionized water, 60mL of absolute ethanol and 3mL of ammonia water (28wt.%), add 0.4g of resorcinol, and stir until dissolved; after stirring continuously for 10min, add 2.8mL of tetraethyl orthosilicate, continue After stirring for 10 min, add 0.56 mL of formaldehyde (36 wt.%), and stir at room temperature for 24 h;

[0050] 2) Transfer the above solution to a 100mL autoclave, place the autoclave in an oven at 100°C, conduct a hydrothermal reaction for 24 hours, take out the autoclave and cool to room temperature naturally;

[0051] 3) Centrifuge the hydrothermal product, wash the solid phase substance with deionized water for 3 times, and wash with absolute ethanol for 3 times...

Embodiment 2

[0065] Example 2, see figure 1 , 2 , 4-8:

[0066] The present invention provides a method for growing porous nickel cobaltate nanosheets rich in oxygen vacancies based on a hollow carbon sphere template, which is basically the same as in Example 1, except that during heat treatment of the composite, nitrogen / air (volume ratio: 9:1) under the atmosphere, the temperature was raised to 320°C at a rate of 5°C / min, and kept for 2h, and then cooled to room temperature with the furnace, and a porous nickel cobaltate nanosheet / hollow carbon sphere composite rich in oxygen vacancies was obtained. Named NiCo 2 o 4 / HCS-320-P.

[0067] A variety of characterizations were carried out on the product of this example: using a scanning electron microscope (SEM) and a transmission electron microscope (TEM) to observe the morphology of the porous nickel cobaltate nanosheet / hollow carbon sphere composite material rich in oxygen vacancies, and obtain a micron flower assembled by the nanoshee...

Embodiment 3

[0070] The present invention provides a method for growing porous nickel cobaltate nanosheets rich in oxygen vacancies based on a hollow carbon sphere template, which is basically the same as that in Example 1, except that the heat treatment of the composite is carried out at 5°C under an air atmosphere. Raise the temperature to 260°C at a rate of 1 / min, keep it warm for 2 hours, and then cool to room temperature with the furnace, and the porous nickel cobaltate nanosheet / hollow carbon sphere composite is obtained, named NiCo 2 o 4 / HCS-260.

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
Specific surface areaaaaaaaaaaa
Average pore diameteraaaaaaaaaa
Limiting current densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a method of growing porous nickel cobaltate nanosheets based on hollow carbon sphere template; the method comprises the steps of synthesizing hollow carbon spheres; growing nickel cobaltate nanosheet precursor on the hollow carbon spheres; using hollow carbon spheres as a support, cobalt acetate tetrahydrate as a cobalt source and nickel acetate tetrahydrate as a nickel source, adjusting pH, and performing hydrothermal reaction to obtain cobalt-nickel nanosheet / hollow carbon sphere precursor; pyrolyzing the cobalt-nickel nanosheet / hollow carbon sphere precursor at high temperature in air atmosphere to obtain porous nickel cobaltate nanosheet / hollow carbon sphere composite grown on the hollow carbon spheres, or pyrolyzing at high temperature in air / inert gas to obtain oxygen-vacancy-rich porous nickel cobaltate nanosheet / hollow carbon sphere composite grown on hollow carbon spheres. The porous nickel cobaltate nanosheet / hollow carbon sphere composite prepared herein has the advantages such as good mechanical properties, low production cost, high conductivity and excellent ORR (oxygen reduction reaction) performance, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the intersecting technical field of micro-nano structure and electrocatalysis, in particular to a method for growing porous nickel cobaltate nanosheets based on a hollow carbon sphere template. Background technique [0002] Electrocatalytic oxygen reduction reaction (ORR, Oxygen Reduction Reaction), as an important anode reaction in fuel cells and metal-air batteries, has been widely used in various fields, but its slow kinetics requires highly catalytically active catalytic materials to drive. In addition, low-cost non-precious metal catalysts are also one of the important goals of sustainable development. Nickel cobalt oxide with spinel structure has attracted more and more attention due to its considerable ORR activity, non-pollution, and abundant resources. Combining with hollow carbon spheres can effectively improve its electrical conductivity, increase its specific surface area and effectively increase its active sites. ...

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): H01M4/88H01M4/90B82Y30/00
CPCB82Y30/00H01M4/88H01M4/9016H01M4/9083Y02E60/50
Inventor 何亮袁慧杨威
Owner WUHAN UNIV OF TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com