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Magnesium-doped cobalt disulfide composite carbon nanotube material, preparation method and application thereof

A technology of cobalt disulfide and carbon nanotubes, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., to achieve the effects of green environmental protection, high repeatability, high stability and cycle performance of the preparation method

Active Publication Date: 2020-10-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Given the extensive research on transition metal oxide catalysts, few studies have been reported to design their intrinsic properties and enhance electrocatalytic performance by co-engineering the anion chemistry and cation chemistry of oxides.

Method used

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  • Magnesium-doped cobalt disulfide composite carbon nanotube material, preparation method and application thereof
  • Magnesium-doped cobalt disulfide composite carbon nanotube material, preparation method and application thereof
  • Magnesium-doped cobalt disulfide composite carbon nanotube material, preparation method and application thereof

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Embodiment 1

[0043] This embodiment provides a magnesium-doped cobalt disulfide composite carbon nanotube material ((Co, Mg)S with bifunctional activity 2 @CNTs) preparation methods such as figure 1 As shown, the specific preparation steps are as follows:

[0044] Step 1: 0.498g Co(Ac) 2 4H 2 O and 0.256g Mg(NO 3 ) 2 ·6H 2 O was added to 35 mL of deionized water, stirred until the crystals disappeared, and then transferred to an ultrasonic machine for sonication to ensure complete dissolution.

[0045] Step 2: Add 50mg of carbon nanotubes (particle size: 20-30nm, purity>98wt%, Zhongke Times Nano Center) into the above solution, and stir ultrasonically for 30 minutes to obtain a mixed solution.

[0046] Step 3: Transfer the mixed solution to a stirrer, add 0.64g of sulfur powder and 5mL of ethanol (as a dispersant) under magnetic stirring.

[0047] Step 4: After ultrasonically oscillating the mixture for 45 minutes, transfer it to a polytetrafluoroethylene lining, add it to the react...

Embodiment 2

[0051] This embodiment provides a magnesium-doped cobalt disulfide composite carbon nanotube material ((Co, Mg)S with bifunctional activity 2 @CNTs) preparation methods such as figure 1 As shown, the specific preparation steps are as follows:

[0052] Step 1: 0.498g Co(Ac) 2 4H 2 O and 0.256g Mg(NO 3 ) 2 ·6H 2 O was added to 35 mL of deionized water, stirred until the crystals disappeared, and then transferred to an ultrasonic machine for sonication to ensure complete dissolution.

[0053] Step 2: Add 50mg of carbon nanotubes (particle size: 20-30nm, purity>98wt%, Zhongke Times Nano Center) into the above solution, and stir ultrasonically for 30 minutes to obtain a mixed solution.

[0054] Step 3: Transfer the mixed solution to a stirrer, add 0.64g of sulfur powder and 5mL of ethanol (as a dispersant) under magnetic stirring.

[0055] Step 4: After ultrasonically oscillating the mixture for 45 minutes, transfer it to a polytetrafluoroethylene lining, add it to the react...

Embodiment 3

[0059] This embodiment provides a magnesium-doped cobalt disulfide composite carbon nanotube material ((Co, Mg)S with bifunctional activity 2 @CNTs) preparation methods such as figure 1 As shown, the specific preparation steps are as follows:

[0060] Step 1: 0.498g Co(Ac) 2 4H 2 O and 0.256g Mg(NO 3 ) 2 ·6H 2 O was added to 40 mL of deionized water, stirred until the crystals disappeared, and then transferred to an ultrasonic machine for sonication to ensure complete dissolution.

[0061] Step 2: Add 50mg of carbon nanotubes (particle size: 20-30nm, purity>98wt%, Zhongke Times Nano Center) into the above solution, and stir ultrasonically for 30 minutes to obtain a mixed solution.

[0062] Step 3: Transfer the mixed solution to a stirrer, add 0.64g of sulfur powder and 5mL of ethanol (as a dispersant) under magnetic stirring.

[0063] Step 4: After ultrasonically oscillating the mixture for 45 minutes, transfer it to a polytetrafluoroethylene lining, add it to the react...

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Abstract

The invention discloses a magnesium-doped cobalt disulfide composite carbon nanotube material, a preparation method and application of the magnesium-doped cobalt disulfide composite carbon nanotube material in preparation of a zinc-air battery cathode catalyst. According to the preparation method, a zinc-air battery cathode catalyst with oxygen reduction and oxygen evolution reactions is preparedby adopting a hydrothermal method, namely magnesium nitrate is used as a doping agent, cobalt acetate is used as a cobalt-based metal sulfide raw material, sulfur powder is used as a vulcanizing agent, and the metal sulfide and carbon nanotubes are compounded at a high temperature in an inert atmosphere. According to the method, under the combination effect of metals and the carbon material, on the one hand, agglomeration of cobalt can be effectively inhibited, on the other hand, oxygen holes with efficient catalytic oxygen reduction and cobalt disulfide particles with oxygen evolution activity are synchronously generated on the carbon nanotubes, and the finally obtained catalyst material can be used for zinc-air batteries to realize long-time and high-stability charge-discharge circulation.

Description

technical field [0001] The invention relates to a regulated and synthesized magnesium-doped cobalt disulfide composite carbon nanotube material, a preparation method and application, and belongs to the technical field of oxygen electrochemical reduction / precipitation dual-function catalysts. Background technique [0002] Today, the depletion of fossil energy and environmental pollution are increasing day by day, and the ensuing environmental problems such as energy shortage and greenhouse effect make it urgent for people to develop new sustainable energy storage devices. Batteries represent a promising and feasible energy conversion technology from the perspective of application prospects in numerous energy systems. Among them, the electrochemical energy source represented by rechargeable zinc-air batteries (ZABs) has attracted widespread attention due to its low cost, environmental friendliness, high safety, and high energy density. The theoretical energy density of the zi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/049B01J35/00B01J37/08B01J37/10H01M4/90
CPCB01J27/049B01J37/10B01J37/08H01M4/9083B01J35/393B01J35/33Y02E60/50
Inventor 乔锦丽郭佳宁徐能能王旭王永霞娄文双李君
Owner DONGHUA UNIV
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