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a kind of nico 2 the s 4 Preparation method of carbon airgel composite electrode material

A composite electrode and carbon aerogel technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of expensive raw materials and complicated composite materials technology, and achieve the effects of simple technology, slow down structure collapse, and excellent mechanical properties

Active Publication Date: 2021-08-03
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fan et al. prepared NiCo by hydrothermal method 2 S 4 / rGO electrode material; Liu et al. prepared NiCo 2 S 4 / carbon nanofiber composite electrode material; Peng et al. prepared NiCo by in-situ growth 2 S 4 / Graphene composite materials, etc., and the composite materials prepared by these methods are more complicated, or the raw materials used are more expensive

Method used

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  • a kind of nico <sub>2</sub> the s <sub>4</sub> Preparation method of carbon airgel composite electrode material
  • a kind of nico <sub>2</sub> the s <sub>4</sub> Preparation method of carbon airgel composite electrode material
  • a kind of nico <sub>2</sub> the s <sub>4</sub> Preparation method of carbon airgel composite electrode material

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Experimental program
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Embodiment 1

[0023] Make the prepared watermelon rind (remove the watermelon pulp and green skin) into a size of 10*20*30mm 3 block, and its surface was cleaned with absolute ethanol; 9mmol Ni(NO 3 ) 2 ·6H 2 O and 18mmol Co(NO 3 ) 2 ·6H 2 O is dissolved in a mixed solution of 30ml ethylene glycol and 10ml ultrapure water, configured to contain Ni 2+ and Co 2+ The mixed solution with a molar ratio of 1:2 was stirred at a stirring speed of 30r / min for 1h, then 36mmol of thiourea was added, and stirred at the same speed for 1h to obtain a uniformly mixed precursor solution; the configured precursor solution and block Put the watermelon rind into a 100ml reactor, conduct a hydrothermal reaction at 180°C for 12 hours, freeze-dry the product at -70°C, and heat the dried sample to 400°C at a heating rate of 5°C / min in a nitrogen atmosphere Insulate for 2 hours, cool to room temperature, and the final product is NiCo 2 S 4 / Carbon airgel composites.

[0024] Its XRD spectrum is shown in...

Embodiment 2

[0026] Make the prepared watermelon rind into a size of 10*20*30mm 3 block, and its surface was cleaned with absolute ethanol; 16mmol Ni(NO 3 ) 2 ·6H 2 O and 32mmol Co(NO 3 ) 2 ·6H 2 O is dissolved in a mixed solution of 35ml ethylene glycol and 10ml ultrapure water, configured to contain Ni 2+ and Co 2+ The mixed solution with a molar ratio of 1:2 was stirred at a stirring speed of 40r / min for 2h, then 64mmol of thiourea was added, and then stirred at the same speed for 2h to obtain a uniformly mixed precursor solution; the configured precursor solution and block Put the watermelon rind into a 100ml reactor, conduct a hydrothermal reaction at 160°C for 14 hours, freeze-dry the product at -70°C, and heat the dried sample to 450°C at a heating rate of 3°C / min in a nitrogen atmosphere Keep warm for 2h. Cool to room temperature, the final product is NiCo 2 S 4 / Carbon airgel composites. Its TEM image is shown in Figure 5 , confirmed that the prepared NiCo 2 S 4 Pa...

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Abstract

The present invention is a kind of NiCo 2 S 4 Preparation method of carbon airgel composite electrode material. The method comprises the following steps: adding a divalent Ni salt compound and a divalent Co salt compound into a solvent to obtain a mixed solution, stirring at a stirring speed of 20 to 50 r / min for 0.5 to 3 hours, and then adding thiourea to obtain a precursor solution; Put the precursor solution and the block watermelon rind into the reaction kettle, and conduct a hydrothermal reaction at 160-200°C for 6-18 hours, then freeze-dry the product, heat-preserve and calcinate it at 350-450°C for 1-3 hours, and then cool to room temperature, the final product is NiCo 2 S 4 / Carbon airgel composites. The NiCo prepared by the present invention 2 S 4 / Carbon airgel composite material is easy to operate and pollution-free, and the obtained composite material has excellent electrochemical performance.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a NiCo 2 S 4 Preparation method of carbon airgel composite electrode material. Background technique [0002] In recent years, due to the continuous reduction of fossil fuels and their serious impact on environmental pollution, the development of green, renewable energy and promising energy storage devices has attracted more and more attention. Supercapacitors have attracted much attention due to their high power density, fast charge and discharge, and excellent cycle stability. The electrode material is a key factor affecting the electrochemical performance of supercapacitors. with RuO 2 Although the representative noble metal oxides have high specific capacity, their wide application is limited due to their high price and toxicity. Therefore, cheap transition metal compounds have become the first choice for supercapacitor electrode materials. While monometallic compounds...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/44
CPCH01G11/24H01G11/30H01G11/44Y02E60/13
Inventor 丁燕董佳欣梁金生李思佳
Owner HEBEI UNIV OF TECH
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