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

A kind of nitrogen-doped graphene/cobaltous oxide composite material and preparation method thereof

A cobalt oxide composite material, nitrogen-doped graphene technology, applied in structural parts, electrical components, battery electrodes, etc., to achieve the effects of improving electrical conductivity and stability, improving catalytic efficiency, and improving the catalytic efficiency of oxygen reduction reaction

Active Publication Date: 2020-12-22
WUHAN UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of platinum resources in the world, the large-scale development of platinum-based fuel cells is limited by resource and cost issues.

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
  • A kind of nitrogen-doped graphene/cobaltous oxide composite material and preparation method thereof
  • A kind of nitrogen-doped graphene/cobaltous oxide composite material and preparation method thereof
  • A kind of nitrogen-doped graphene/cobaltous oxide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of nitrogen-doped graphene / cobaltous oxide composite material, its preparation method comprises the steps:

[0040] 1) Add 100 mg of graphite oxide into deionized water, ultrasonically disperse for 1 hour, stir for 0.5 hour, and then ultrasonically disperse for 1 hour to form a GO dispersion;

[0041] 2) Dissolve 100mg of cobalt acetate tetrahydrate and 4g of ammonium carbonate in deionized water to prepare a homogeneous aqueous solution. Add the prepared cobalt acetate solution and ammonium carbonate solution to the GO dispersion and stir for 0.5h. The resulting mixed solution (The concentration of graphene oxide is 0.5mg / ml) into a 500ml two-necked flask, put the flask into a water bath preheated to 80°C, continue to stir and condense and reflux for 10h; after the water bath is over, take out the flask and continue to stir And let the solution cool down naturally; put the cooled solution into the polytetrafluoroethylene liner, put the liner into the reaction ke...

Embodiment 2-4

[0048] The preparation method of nitrogen-doped graphene / cobaltous oxide composite material described in embodiment 2-4 is roughly the same as embodiment 1, and difference is: the consumption of ammonium carbonate in step 2) is respectively 1g (embodiment 2), 2g (Example 3) and 3g (Example 4).

Embodiment 5-8

[0051] Other parameter steps of embodiment 5-8 are identical with embodiment 1, difference is: in the step (2), the consumption of tetrahydrate cobalt acetate is respectively 150mg (embodiment 5), 200mg (embodiment 6) 250mg (embodiment 7 ) and 300 mg (Example 8).

[0052] Comparing Example 1 with Examples 5-8, the results show that too much content of cobaltous oxide will affect the electrical conductivity of the composite material and affect the enhancement trend of the oxygen reduction catalytic performance of the composite material.

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
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a nitrogen-doped graphene / cobaltous oxide composite material. Graphite oxide, a cobaltous acetate solution and ammonium carbonate are taken as the main raw materials, and cobaltous oxide is loaded on nitrogen-doped graphene by adopting a water bath-hydrothermal-calcining method to obtain the nitrogen-doped graphene / cobaltous oxide composite material. Compounding of nitrogen-doped graphene and cobaltous oxide is proposed initially in the invention, the obtained composite material is high in cobaltous oxide purity, and a synergistic effect between cobaltous oxide and nitrogen-doped graphene can be achieved, so that an excellent catalytic ability on a fuel cell negative electrode oxygen reduction reaction can be achieved; meanwhile, the material cost of a catalyst is greatly lowered; and the involved preparation method is simple, high in repeatability and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to a nitrogen-doped graphene / cobaltous oxide composite material and a preparation method thereof. Background technique [0002] With the development of society, non-renewable energy sources such as coal and oil are decreasing day by day, and the extensive use of fossil energy has also caused various environmental problems and hindered the development of human society and economy. Therefore, it is very necessary to find new clean energy. Fuel cells can directly convert chemical energy into electrical energy without being limited by the Carnot cycle, and have high energy conversion efficiency. It is considered to be one of the new environmentally friendly and efficient power generation technologies in the 21st century. [0003] Since the fuel cell converts chemical energy into electrical energy through the chemical reaction of the cathode and anode ...

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 Patents(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/8825H01M4/9083Y02E60/50
Inventor 涂文懋付占明
Owner WUHAN UNIV OF 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