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Preparation method of carbon-based metal selenide composite material

A composite material and base metal technology, which is applied in the field of preparation of carbon-based metal selenide composite materials, can solve problems such as cumbersome template processing, and achieve the effects of shortened diffusion distance, high structural stability, and simple preparation method and process.

Active Publication Date: 2021-08-31
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a carbon-based metal selenide composite material, aiming to solve the technical problem that the subsequent template treatment is very cumbersome when using a hard template method to prepare porous materials

Method used

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  • Preparation method of carbon-based metal selenide composite material
  • Preparation method of carbon-based metal selenide composite material
  • Preparation method of carbon-based metal selenide composite material

Examples

Experimental program
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Embodiment 1

[0034] Example 1 This example provides a method for preparing a carbon-based metal selenide composite material, the specific operations are as follows:

[0035] (1) Preparation of metal organic framework Co-Ni PBA and NaCl mixture

[0036] Dissolve 311.616mg of cobalt chloride and 463.208mg of sodium citrate in 45mL of deionized water and stir well to make solution A, dissolve 331.511mg of potassium tetracyanonickelate in 45mL of deionized water and stir well to make solution B, solution A quickly Pour into solution B and stir to dissolve, leave to age at room temperature for 24 hours, centrifuge and dry to obtain Co-Ni PBA powder, then accurately weigh 50mg Co-Ni PBA, 1g NaCl in 0.5mL methanol and 4.5mL of water in a mixed solution, put it in an ultrasonic disperser and sonicate for 1h. After the ultrasonic wave is completed, place the mixed solution in a freeze dryer and freeze-dry for 12h to obtain NaCl / Co-Ni PBA mixed powder ;

[0037] (2) Preparation of carbon-encapsula...

Embodiment 2

[0044] This embodiment provides a method for preparing a carbon-based metal selenide composite material, the specific operations are as follows:

[0045] (1) Preparation of metal organic framework Co-Ni PBA and NaCl mixture

[0046] Dissolve 311.616mg of cobalt chloride and 463.208mg of sodium citrate in 45mL of deionized water and stir well to make solution A, dissolve 331.511mg of potassium tetracyanonickelate in 45mL of deionized water and stir well to make solution B, solution A quickly Pour into solution B and stir to dissolve, leave to age at room temperature for 24 hours, centrifuge and dry to obtain Co-Ni PBA powder, then accurately weigh 50mg Co-Ni PBA, 1g NaCl in 0.5mL methanol and 4.5mL of water in a mixed solution, put it in an ultrasonic disperser and sonicate for 1h. After the ultrasonic wave is completed, place the mixed solution in a freeze dryer and freeze-dry for 12h to obtain NaCl / Co-Ni PBA mixed powder .

[0047] (2) Preparation of carbon-encapsulated nic...

Embodiment 3

[0054] This embodiment provides a method for preparing a carbon-based metal selenide composite material, the specific operations are as follows:

[0055] (1) Preparation of metal organic framework Co-Ni PBA and NaCl mixture

[0056] Dissolve 311.616mg of cobalt chloride and 463.208mg of sodium citrate in 45mL of deionized water and stir well to make solution A, dissolve 331.511mg of potassium tetracyanonickelate in 45mL of deionized water and stir well to make solution B, solution A quickly Pour into solution B and stir to dissolve, leave to age at room temperature for 24 hours, centrifuge and dry to obtain Co-Ni PBA powder, then accurately weigh 50mg Co-Ni PBA, 1g NaCl in 0.5mL methanol and 4.5mL of water, put it in an ultrasonic disperser and sonicate for 1h. After the ultrasonication is completed, place the mixed solution in a freeze dryer for 12h to freeze-dry to obtain NaCl / Co-Ni PBA mixed powder.

[0057] (2) Preparation of carbon-encapsulated nickel / cobalt particle com...

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Abstract

The invention discloses a preparation method of a carbon-based metal selenide composite material, and the method comprises the following steps: (1) mixing a prepared metal organic framework Co-NiPBA with NaCl, and taking the mixture as a precursor; (2) calcining the precursor prepared in the step (1) in argon, changing sodium chloride into molten salt to penetrate and coat the metal organic framework derived carbon in the calcining process, and removing the sodium chloride to obtain a metal organic framework derived carbon-encapsulated nickel / cobalt particle composite material; (3) selenizing the metal organic framework derived carbon-encapsulated nickel / cobalt particle composite material to obtain a carbon-based metal selenide composite material; the process is simple, environment-friendly and low in production cost; the prepared composite material is high in structural stability, large in specific surface area and high in electrochemical activity, and can greatly improve the conductivity of an electrode as a carrier, so the composite material has very high specific capacity and energy density as an electrode material, and can be widely applied to the field of energy storage.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor electrode materials, and in particular relates to a preparation method of a carbon-based metal selenide composite material. Background technique [0002] In recent years, with the development of industry and the progress of society, the problem of energy shortage has become increasingly serious, and it is urgent to find new materials that can replace fossil energy for energy storage and application. Metal-organic frameworks (MOFs) materials have the characteristics of high specific surface area, rich pore structure, and diversification of organic ligands and metal nodes, which can play a very good role in promoting the transport rate of electrons and ions, so they are used in supercapacitors. The field of energy storage has a wide range of applications. [0003] However, MOFs materials have inevitable defects as electrode materials, that is, their poor conductivity and stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/26H01G11/86
CPCH01G11/30H01G11/32H01G11/26H01G11/86Y02E60/13
Inventor 高江姗何燕周杨王欢欢
Owner QINGDAO UNIV OF SCI & TECH
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