A kind of mns@comn-ldh composite material and its preparation method and application

A composite material and thermal reaction technology, which is applied in the field of electrochemistry and nanomaterials, can solve the problems of unsatisfactory electrochemical performance, limited application, low conductivity, etc., and achieve rich electrolyte diffusion channels, simple preparation methods, and high current density. Effect

Active Publication Date: 2021-02-26
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aggregation and low conductivity of LDH limit the transport of ions / electrons, leading to unsatisfactory electrochemical performance and limiting its further application.

Method used

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  • A kind of mns@comn-ldh composite material and its preparation method and application
  • A kind of mns@comn-ldh composite material and its preparation method and application
  • A kind of mns@comn-ldh composite material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of MnS@CoMn-LDH composite material such as figure 1 shown, including the following steps:

[0032] The first step is hydrothermal, 0.1g MnCl 2 4H 2 O was dissolved in 25mL of deionized water, and 5mL of 0.1mol / L Na 2 S, after magnetic stirring for 20min, transfer to a 50mL polytetrafluoroethylene-lined stainless steel autoclave for the first step of hydrothermal reaction, the hydrothermal reaction temperature is 120°C, and the hydrothermal reaction time is 8h; Take it out to cool, then centrifuge, wash, and vacuum dry at 60°C for 12 hours to obtain MnS powder. In the second step of hydrothermal treatment, 1mmolMnCl 2 4H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 5 mmol NH 4 F, 5mmol urea was dissolved in deionized water, and after magnetic stirring for 30min, the MnS sample prepared by hydrothermal treatment in the first step was added, and after it was mixed evenly, it was transferred to a polytetrafluoroethylene-lined stainless steel autocla...

Embodiment 2

[0035] A preparation method of MnS@CoMn-LDH composite material, comprising the following steps:

[0036] The first step is hydrothermal, 0.1g MnCl 2 4H 2 O was dissolved in 25mL of deionized water, and 5mL of 0.1mol / L Na 2 S, after magnetic stirring for 20min, transfer to a 50mL polytetrafluoroethylene-lined stainless steel autoclave for the first step of hydrothermal reaction, the hydrothermal reaction temperature is 150°C, and the hydrothermal reaction time is 8h; Take it out to cool, then centrifuge, wash, and vacuum dry at 60°C for 12 hours to obtain MnS powder. In the second step of hydrothermal treatment, 1mmolMnCl 2 4H2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 5 mmol NH 4 F, 5mmol urea was dissolved in deionized water, and after magnetic stirring for 30min, the MnS sample prepared by hydrothermal treatment in the first step was added, and after it was mixed evenly, it was transferred to a polytetrafluoroethylene-lined stainless steel autoclave for the second step of water h...

Embodiment 3

[0039] A preparation method of MnS@CoMn-LDH composite material, comprising the following steps:

[0040] The first step is hydrothermal, 0.1g MnCl 2 4H 2 O was dissolved in 25mL of deionized water, and 5mL of 0.1mol / L Na 2 S, after magnetic stirring for 20min, transfer to a 50mL polytetrafluoroethylene-lined stainless steel autoclave for the first step of hydrothermal reaction, the hydrothermal reaction temperature is 120°C, and the hydrothermal reaction time is 12h; Take it out to cool, then centrifuge, wash, and vacuum dry at 60°C for 12 hours to obtain MnS powder. In the second step of hydrothermal treatment, 1mmolMnCl 2 4H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 5 mmol NH 4 F, 5mmol urea was dissolved in deionized water, and after magnetic stirring for 30min, the MnS sample prepared by hydrothermal treatment in the first step was added, and after it was mixed evenly, it was transferred to a polytetrafluoroethylene-lined stainless steel autoclave for the second step of wate...

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Abstract

The invention relates to a MnS@CoMn-LDH composite material and its preparation method and application. The preparation method of the composite material includes the following steps: 1) dissolving soluble manganese salt in water, then adding sulfide, and performing a hydrothermal reaction, After centrifugation, washing, and drying, MnS is obtained; 2) soluble manganese salt, soluble cobalt salt, ammonium fluoride and urea are dissolved in water, then MnS is added, and a second hydrothermal reaction is carried out, and after cooling, centrifugation, and washing and dry to obtain the MnS@CoMn‑LDH composite material; the composite material is prepared into a working electrode for use in a supercapacitor. Compared with the prior art, the present invention synthesizes the MnS@CoMn‑LDH composite material through two-step hydrothermal method, the composite material contains abundant mesopores and micropores to achieve good electrochemical performance, and the preparation method of the composite material is simple , is environmentally friendly, greatly shortens the synthesis time, and facilitates large-scale production of high-purity MnS@CoMn‑LDH composites.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and nanometer materials, and relates to a MnS@CoMn-LDH composite material, a preparation method thereof, and an application in supercapacitors. Background technique [0002] With the increasing environmental pollution and fossil fuel consumption, the development of renewable energy storage devices has become increasingly important. Supercapacitors, also known as electrochemical capacitors, have attracted extensive attention from industry and academia due to their high power density, high rate capability, fast charge-discharge process, and long cycle life (>100,000 cycles). The performance of supercapacitors essentially depends on the properties of the electrode materials. In recent years, transition metal oxides, sulfides, and hydroxides have been extensively studied as electrode materials for battery-type supercapacitors due to their high theoretical specific capacitance. Among the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/24H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 蒋继波胡晓敏刘顺昌王露露丛海山张莹杨圆圆马健孙瑶馨韩生
Owner SHANGHAI INST OF TECH
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