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Metal cation doped cobalt polysulfide/cobalt hydroxide composite material and preparation method and application thereof

A metal cation, cobalt hydroxide technology, applied in metal material coating process, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc. Simple, short time-consuming, high specific capacitance effect

Active Publication Date: 2020-12-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned metal cation-doped electrode materials only stay on the surface of the material, and some doping methods are too cumbersome.

Method used

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  • Metal cation doped cobalt polysulfide/cobalt hydroxide composite material and preparation method and application thereof
  • Metal cation doped cobalt polysulfide/cobalt hydroxide composite material and preparation method and application thereof
  • Metal cation doped cobalt polysulfide/cobalt hydroxide composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Cu@CoS x / Co(OH) 2 Preparation of nanosheets and their application to supercapacitor electrode materials

[0040] When the doped metal cation is copper, its preparation steps are:

[0041] Take 0.409g (1.4mmol) Co(NO 3 ) 2 ·6H 2 O, 0.028g (0.12mmol) Cu(NO 3 ) 2 ·3H 2 O was dissolved in 30mL methanol, 0.3g (3mmol) dimethylimidazole was dissolved in 10mL methanol, the two were mixed evenly, and the solution was transferred to a 50mL hydrothermal kettle; the pretreated 4×1cm foamed nickel substrate was added, and The reaction was carried out at 120° C. for 2 hours. After the reaction was completed, it was naturally cooled to room temperature, and the nickel foam substrate was taken out, rinsed several times with deionized water and absolute ethanol, and vacuum-dried at 60°C for 12 hours to obtain Cu@Co / NF-Pre.

[0042] Take 0.6g (2.5mmol) Na 2 S·9H 2 O was dissolved in 40 mL of water, Cu@Co / NF-Pre was added, and reacted at 140 °C for 2 hours. After t...

Embodiment 2

[0051] Example 2: Zn@CoSx / Co(OH) 2 Preparation of nanosheets and their application to supercapacitor electrode materials

[0052] When the metal cation of doping is zinc, its preparation steps are:

[0053] Take 0.412g (1.4mmol) Co(NO 3 ) 2 ·6H 2 O, 0.035g (0.12mmol) Zn (NO 3 ) 2 ·6H 2 O was dissolved in 30mL ethanol, 0.5g (3mmol) terephthalic acid was dissolved in 10mL ethanol, the two were mixed evenly, and the solution was transferred to a 50mL hydrothermal kettle; the pretreated 4×1cm foamed nickel substrate was added, and The reaction was carried out at 120° C. for 4 hours. After the reaction was completed, it was naturally cooled to room temperature, and the nickel foam substrate was taken out, rinsed several times with deionized water and absolute ethanol, and vacuum-dried at 60°C for 12 hours to obtain Zn@Co / NF-Pre.

[0054] Take 0.6g Na 2 S·9H 2 O (2.5mmol) was dissolved in 40mL of water, Zn@Co / NF-Pre was added, and the reaction was carried out at 140°C for ...

Embodiment 3

[0059] Example 3: Mn@CoSx / Co(OH) 2 Preparation of nanosheets and their application to supercapacitor electrode materials

[0060] When the metal cation of doping is manganese, its preparation steps are:

[0061] Take 0.400g (1.4mmol) Co(NO 3 ) 2 ·6H 2 O, 0.030g (0.12mmol) Mn(NO 3 ) 2 4H 2 Dissolve O in 30mL N,N-dimethylformamide, take 0.5g (3mmol) phthalic acid and dissolve it in 10mL N,N-dimethylformamide, mix the two evenly and transfer the solution to a 50mL hydrothermal kettle ; Add the pretreated 4×1cm foam nickel substrate, and react at 120°C for 6 hours. After the reaction was completed, it was naturally cooled to room temperature, and the nickel foam substrate was taken out, rinsed several times with deionized water and absolute ethanol, and vacuum-dried at 60°C for 12 hours to obtain Mn@Co / NF-Pre.

[0062] Take 0.6g Na 2 S·9H 2 O (2.5mmol) was dissolved in 40mL of water, Mn@Co / NF-Pre was added, and the reaction was carried out at 140°C for 4 hours. After th...

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Abstract

The invention provides a metal cation doped cobalt polysulfide / cobalt hydroxide composite material and a preparation method thereof. A solvothermal method is adopted, firstly, metal cations are dopedinto a cobalt precursor growing on foamed nickel in situ, and the precursor is a two-dimensional nanosheet array with a hierarchical porous structure; then a self-supporting M-coated CoSx / Co (OH) 2 nanosheet material is prepared through a liquid phase vulcanization method; the preparation method is simple in process, short in consumed time and low in cost, and the prepared material has a hierarchical and mesoporous structure and a large specific surface area and provides more active sites; meanwhile, the transmission path of ions can be shortened, the interface resistance between the electrodeand an electrolyte is reduced, particularly, due to the doping of metal cations, the electronic structure of the electrode is effectively adjusted, the intrinsic conductivity of the material is optimized, the specific capacitance is as high as 3500 to 4000 F g < 1 >, and the electrode material is a novel high-performance supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the technical field of nanostructure functional materials and electrochemical energy storage, and provides a metal cation-doped cobalt polysulfide / cobalt hydroxide composite material nanosheet (denoted as M@CoS x / Co(OH) 2 , metal cation M is Cu, Zn or Mn) and preparation method thereof, and the application as the electrode material of supercapacitor. Background technique [0002] Compared with secondary batteries, supercapacitors have the advantages of fast charge and discharge, long cycle life, high power density, and environmental friendliness, and are a new type of electrochemical energy storage device with great development prospects. An ideal supercapacitor electrode material should have the characteristics of high specific surface area, high porosity, and good electrical conductivity. Therefore, it is necessary to optimize the design and controllable preparation of the structure of its electrode materials. For the str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24H01G11/86C23C26/00B82Y30/00B82Y40/00
CPCH01G11/30H01G11/24H01G11/86C23C26/00B82Y30/00B82Y40/00Y02E60/13
Inventor 郑华均杨鹏举郑灵霞叶伟青
Owner ZHEJIANG UNIV OF TECH
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