Method for preparing hydrolysis-regulated nickel cobalt sulfide/carbon cloth porous supercapacitor electrode material

A technology of supercapacitor electrodes and nickel-cobalt sulfide, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, can solve the problems of reduced specific surface area of ​​materials and decreased energy storage properties of electrode materials, and achieve large specific surface area and improved Capacitive properties and rate performance, effect of high-efficiency contact

Inactive Publication Date: 2019-08-16
NANYANG INST OF TECH
View PDF2 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in research at home and abroad, the preparation of electrode materials using MOFs as a matrix mainly uses high-temperature heat treatment to decompose the MOFs structure, which seriously reduces the specific surface area of ​​the material, resulting in a sharp decline in the energy storage properties of the electrode material.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing hydrolysis-regulated nickel cobalt sulfide/carbon cloth porous supercapacitor electrode material
  • Method for preparing hydrolysis-regulated nickel cobalt sulfide/carbon cloth porous supercapacitor electrode material
  • Method for preparing hydrolysis-regulated nickel cobalt sulfide/carbon cloth porous supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] figure 1 It is a schematic diagram of the preparation route of the present invention. The present invention prepares cobalt-based metal-organic frameworks (Co-MOFs) composites grown on carbon cloth, porous nickel-cobalt layered double hydroxide / carbon cloth (Ni-Co LDH / CC) composites and the preparation of porous nickel-cobalt sulfide / carbon cloth (Ni-Co-S / CC) composites, the prepared carbon cloth-based fabric has multiple valence states, large specific surface area and high electrical activity. The hollow and porous morphology of binary metal sulfides plays a crucial role in enhancing the performance of energy storage devices.

[0032] Step 1. Preparation of Co-MOFs composite grown on carbon cloth:

[0033] Soak the carbon cloth in nitric acid for 9-24h, and then wash it with distilled water. Use hydrated cobalt nitrate and 2-methylimidazole as the precursors of the metal ion center and organic ligand respectively, dissolve and mix in the solvent, immerse the carbon ...

Embodiment 1

[0045] (1) Soak the carbon cloth in nitric acid for 10 h, and wash it with distilled water. Dissolve 1 mmol of cobalt nitrate hydrate and 8 mmol of 2-methylimidazole in 30 ml of methanol respectively, stir and mix, then immerse the treated carbon cloth (2 cm*5 cm) in the mixture, stir and react for 5 h , Take the sample out, wash it with distilled water, and dry it in a constant temperature drying oven at 60°C.

[0046] (2) Dissolve 2 mmol of hydrated nickel nitrate in 30 ml of methanol, immerse the sample obtained in step (1) into the nickel nitrate solution, stir and react for 10 min, take out the sample, and wash with distilled water and ethanol respectively.

[0047] (3) Dissolve 6 mmol thioacetamide in 30 ml ethanol solution, place the thioacetamide solution in a 50 ml hydrothermal kettle, and immerse the sample obtained in step (2) into the solution, and react at 120°C After 3 h, the samples were taken out after the reaction, washed with distilled water and ethanol resp...

Embodiment 2

[0055] (1) Soak the carbon cloth in nitric acid for 10 h, and wash it with distilled water. Dissolve 1 mmol of cobalt nitrate hydrate and 8 mmol of 2-methylimidazole in 30 ml of methanol respectively, stir and mix, then immerse the treated carbon cloth (2 cm*5 cm) in the mixture, stir and react for 5 h , Take the sample out, wash it with distilled water, and dry it in a constant temperature drying oven at 60°C.

[0056] (2) Dissolve 2 mmol of hydrated nickel nitrate in 30 ml of methanol, immerse the sample obtained in step (1) into the nickel nitrate solution, stir and react for 20 min, take out the sample, and wash with distilled water and ethanol respectively.

[0057] (3) Dissolve 6 mmol of thioacetamide in 30 ml of ethanol solution, place the thioacetamide solution in a 50 ml hydrothermal kettle, and immerse the sample obtained in step (2) into the solution, and react at 120°C After 3 h, the samples were taken out after the reaction, washed with distilled water and ethano...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
capacitanceaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for preparing a hydrolysis-regulated nickel cobalt sulfide / carbon cloth porous supercapacitor electrode material. The method comprises the preparation of a cobalt-basedmetal organic frame / carbon cloth composite material, the preparation of a porous nickel-cobalt layered double-metal hydroxide / carbon cloth composite material and the preparation of a porous nickel cobalt sulfide / carbon cloth composite material. According to the invention, in the preparation process of the porous nickel-cobalt layered double-metal hydroxide / carbon cloth composite material, holes are generated through the ion exchange of a cobalt-based metal organic frame material Co-MOFs and a nickel nitrate solution and the etching of Co-MOFs by a Ni2+ hydrolysis effect, the nickel-cobalt layered double-metal hydroxide with a hollow porous structure grown on carbon cloth is synthesized, on the basis of maintaining the shape of a MOFs parent body, a hollow porous morphology structure of abinary metal sulfide with multiple valence states, large specific surface area and high electroactivity based on the carbon cloth is prepared, and the capacitance property, rate performance and electrochemical cycle life of the composite material as an electrode are improved.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing a nickel-cobalt sulfide / carbon cloth porous supercapacitor electrode material controlled by hydrolysis. Background technique [0002] In recent years, the problems of huge resource consumption and environmental pollution have become increasingly prominent. With the transformation and upgrading of my country's industrial structure, the rapid development of new energy industries and technologies has been promoted. Supercapacitors play a vital role in promoting the development of new energy technologies due to their fast and safe charging and discharging characteristics, ultra-high power density, and physical properties such as light weight and small size. The performance of supercapacitors is closely related to the properties of its electrode materials. Compared with traditional carbon materials, transition metal sulfides, especially nickel-c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/86
CPCH01G11/24H01G11/30H01G11/32H01G11/86Y02E60/13
Inventor 郭萌李旭阳杜朝军刘学国曾宪彩刘光印
Owner NANYANG INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap