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Cobalt sulfide/carbon composite material with flower-like structure and preparation method thereof

A carbon composite material, flower-like structure technology, applied in structural parts, nanotechnology for materials and surface science, electrical components, etc., can solve the problems of complex technology and equipment, high production cost, low production cost, prevent The effect of agglomeration, high specific surface area

Inactive Publication Date: 2016-11-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation methods of metal sulfides and their carbon composites, toxic and harmful gaseous sulfur sources such as hydrogen sulfide and sulfur dioxide are usually involved, and most of the technologies and equipment are relatively complicated and the production cost is high. Toxic metal sulfide preparation method

Method used

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  • Cobalt sulfide/carbon composite material with flower-like structure and preparation method thereof
  • Cobalt sulfide/carbon composite material with flower-like structure and preparation method thereof
  • Cobalt sulfide/carbon composite material with flower-like structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Example 1: First, 5 mmol of Co(NO 3 ) 2 ·6H 2 O was mixed with 10 mmol of hexamethylenetetramine and dissolved in 20 mL of de-carbonated deionized water to prepare a mixed solution; then 15 mmol of sulfanilic acid and 15 mmol of NaOH were dissolved in 20 mL of de-carbonated Neutralization reaction was carried out in deionized water to obtain sodium m-aminobenzenesulfonate solution; under the protection of nitrogen, the above mixed solution and sodium m-aminobenzenesulfonate solution were mixed, stirred evenly, and then transferred to a 50 mL polytetrafluoroethylene substrate In a high-pressure reactor, put it in an oven at 100 o C constant temperature reaction for 12 h, take out the autoclave and cool to room temperature naturally, wash with 500 mL of deionized water and 200 mL of ethanol by suction filtration until the pH value of the filtrate is 7, and then filter the cake at 80 o C was air-dried for 8 h to obtain cobalt hydroxide intercalated with m-aminobenzenesu...

Embodiment 2

[0021] Embodiment 2: first the CoCl of 2.5 mmol 2 ·6H 2 O was mixed with 5 mmol of hexamethylenetetramine and dissolved in 20 mL of de-carbonated deionized water to prepare a mixed solution; then 15 mmol of p-aminobenzenesulfonic acid and 15 mmol of NaOH were dissolved in 20 mL of de-carbonated de-carbonated Neutralization reaction was carried out in deionized water to obtain sodium p-aminobenzenesulfonate solution; under the protection of nitrogen, the above mixed solution and sodium p-aminobenzenesulfonate solution were mixed, stirred evenly, and then transferred to a 50 mL polytetrafluoroethylene substrate In a high-pressure reactor, put it in an oven at 100 o C constant temperature reaction 8 h, take out the autoclave and cool to room temperature naturally, use 500 mL of deionized water and 200 mL of ethanol to filter and wash until the pH value of the filtrate is 7, and then filter the cake at 70 o C was air-dried for 12 h to obtain cobalt hydroxide intercalated with p-...

Embodiment 3

[0023] Embodiment 3: first the CoSO of 1 mmol 4 ·7H 2 O was mixed with 2 mmol of hexamethylenetetramine and dissolved in 20 mL of de-carbonated deionized water to prepare a mixed solution; then 15 mmol of m-aminobenzenesulfonic acid and 15 mmol of NaOH were dissolved in 20 mL of de-carbonated Neutralization reaction was carried out in deionized water to obtain sodium m-aminobenzenesulfonate solution; under the protection of nitrogen, the above mixed solution and sodium m-aminobenzenesulfonate solution were mixed, stirred evenly and transferred to a 50 mL polytetrafluoroethylene substrate In a high-pressure reactor, put it in an oven at 120 o C constant temperature reaction for 8 h, take out the autoclave and cool it down to room temperature naturally, filter and wash with 500 mL deionized water and 200 mL ethanol until the pH value of the filtrate is 7, then put the filter cake at 60 o C was air-dried for 20 h to obtain cobalt hydroxide intercalated with m-aminobenzenesulfon...

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Abstract

The invention provides a cobalt sulfide / carbon composite material with a flower-like structure and a preparation method thereof, and belongs to the technical field of fuel cell electrocatalysts and preparation thereof. The cobalt sulfide / carbon composite material with the flower-like structure is prepared from flower-like carbon with the diameter of 1-5 microns and Co9S8 with the particle sizes of 5-70nm; the mass percent content of the Co9S8 is 30%-80%; the flower-like carbon is prepared from interconnected carbon nanosheets of which the radial sizes are 0.5-3 microns and the thicknesses are 5-20nm; and Co9S8 particles are uniformly loaded on the carbon nanosheets. The preparation method of the cobalt sulfide / carbon composite material with the flower-like structure comprises the steps of intercalating anions of organic small molecules between layered cobalt hydroxide layers through hydrothermal reaction to obtain an intercalated structure precursor, mixing the intercalated structure precursor with powdered sulfur, and then carrying out high-temperature calcination to obtain the cobalt sulfide / carbon composite material with the flower-like structure. The method has the advantages that the method is environment-friendly and nontoxic, the technology is simple and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of fuel cell electrocatalyst and its preparation, and in particular relates to a cobalt sulfide / carbon composite material with a flower-like structure and a preparation method thereof. Background technique [0002] Due to its advantages of high power density, high energy conversion efficiency, and environmental friendliness, fuel cells have attracted extensive attention from researchers. As an efficient and clean power source, they are expected to be widely used in electric vehicles and portable electronic devices. In fuel cells, the slow kinetics of the cathodic oxygen reduction reaction severely restricts the commercialization of fuel cells. Although Pt-based catalysts exhibit excellent catalytic activity for oxygen reduction, their wide application in commercial fuel cells is hindered by the high price, low storage and poor stability of Pt metal. Therefore, it is increasingly urgent to develop highly eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8825H01M4/9083Y02E60/50
Inventor 杨文胜王俊白帆
Owner BEIJING UNIV OF CHEM TECH
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