Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Self-supporting CoMoS<4> supercapacitor electrode material and preparation method and application thereof

A technology for supercapacitors and electrode materials, applied in the field of electrochemistry, can solve the problems of difficult residual liquid treatment compared with hydrothermal reaction systems, lower specific capacitance of supercapacitors, easy generation of toxic and harmful substances, etc., to improve capacitance performance and stability, The effect of improving specific capacitance and high stability

Inactive Publication Date: 2020-01-14
CENT SOUTH UNIV
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two methods all have the disadvantages of low yield, unknown atmosphere pressure in the kettle during the reaction, and the inability to accurately control the shortcomings, resulting in a serious waste of raw materials.
In addition, because the solvothermal method uses organic matter as the reaction solvent, it is easy to produce toxic and harmful substances in the process of material preparation, and the treatment of the residual liquid after the reaction is more difficult than the hydrothermal reaction system.
In addition, in terms of electrode construction, due to the presence of conductive agents and binders used in the preparation process of the working electrode process, the specific capacitance per unit mass / area of ​​the supercapacitor will decrease, and it will also occur during long cycles. Problems such as particle scattering of electrode materials

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
  • Self-supporting CoMoS&lt;4&gt; supercapacitor electrode material and preparation method and application thereof
  • Self-supporting CoMoS&lt;4&gt; supercapacitor electrode material and preparation method and application thereof
  • Self-supporting CoMoS&lt;4&gt; supercapacitor electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] Self-supporting CoMoS in a specific embodiment of the present invention 4 The preparation method of supercapacitor electrode material, comprises the following steps:

[0035] (1) Prepare a certain concentration of Co 2+ solution, self-supporting Co(OH) was prepared by electrodeposition in a three-electrode system 2 Electrodes as precursors can also be used to prepare self-supporting Co(CO 3 ) 0.5 OH electrode as a precursor.

[0036] The self-supporting electrode substrate in the electrodeposition process can be cleaned foamed nickel, carbon felt, carbon fiber paper, conductive glass or conductive carbon cloth. Remove oil stains and attachments on the surface of conductive objects.

[0037] Preferably, the counter electrode and reference electrode of electrodeposition are respectively platinum plate electrode and silver chloride electrode, and the concentration of electrodeposition liquid is 0.002mol L -1 ~0.5mol L -1 co 2+ , Co source can be cobalt chloride, co...

Embodiment 1

[0050] A self-supporting CoMoS 4 The preparation method of supercapacitor electrode material, its specific preparation process is as follows:

[0051] (1) Cut the carbon fiber paper into 2cm*4cm, use 1mol L -1 Ultrasonic cleaning with sodium hydroxide solution for 30 minutes to remove stains and impurities on the surface of the material, then ultrasonic cleaning with deionized water and absolute ethanol in sequence, and drying in an oven at 60°C for 4 hours, and set aside.

[0052] (2) Weigh 2.4278g CoCl 2 ·6H 2 O was dissolved in 50 mL of deionized water, and stirred for 30 min to obtain a pink transparent solution as the electrodeposition solution for the electrodeposition reaction, and the electrodeposition solution was transferred to a 100 mL electrolytic cell.

[0053] (3) The carbon fiber electrode prepared in step (1) was used as the working electrode, Ag / AgCl was used as the reference electrode, and the Pt sheet was used as the counter electrode, and electrodepositi...

Embodiment 2

[0059] (1) Cut the nickel foam into a size of 1*2cm, put it in 2M HCl solution and ultrasonically wash it for 10 minutes, remove the NiO layer on the surface of the nickel foam, wash it with deionized water and absolute ethanol several times, and then place it in a vacuum at 60°C Vacuum-dry in a drying oven for 3 h and set aside.

[0060] (2) Add 5mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL deionized water to prepare Co 2+ The metal salt mixture, stirred until completely dissolved. And use ammonia water to adjust the pH of the mixed solution to about 7, and use it as an electrodeposition electrolyte for future use.

[0061] (3) The nickel foam prepared in step (1) was used as the working electrode, Ag / AgCl and Pt were respectively used as the reference electrode and the counter electrode, and the electrodeposition was carried out by constant current deposition method. Among them, the salt solution prepared in step (2) is used as the electrolyte, and at 20mA cm -1 The ...

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

No PUM Login to View More

Abstract

The invention discloses a self-supporting CoMoS<4> supercapacitor electrode material and a preparation method and application thereof. A self-supporting Co(OH)<2> electrode precursor is obtained by anelectrodeposition method; ammonium paramolybdate and ammonia water are heated to react to generate ammonium molybdate, and then (NH4)<2>S is added to react with the ammonium molybdate to form (NH4)<2>MoS<4>; precipitate of (NH4)<2>MoS<4> is dispersed uniformly in water, then the precipitate of the (NH4)<2>MoS<4> is placed in the electrode precursor for a hydrothermal reaction, and through aftertreatment, the self-supporting CoMoS<4> supercapacitor electrode material is obtained. According to the self-supporting CoMoS<4> supercapacitor electrode material and the preparation method and application thereof, costs of a binder and a conductive agent in the electrode preparation process can be eliminated, and meanwhile, the active material component ratio of pole pieces is improved, so that thespecific capacitance per unit area is improved. The self-supporting CoMoS<4> supercapacitor electrode material has a huge specific surface area and abundant micropores, and can effectively be in contact with an electrolytic solution to obtain the highly stable electrode material.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, in particular, relates to the technical field of supercapacitor anode materials, in particular to a CoMoS 4 The nano sheet is used as a supercapacitor electrode material, a preparation method and an application. Background technique [0002] Pseudocapacitive supercapacitors have been widely used in portable electronic devices, electric vehicles / hybrid vehicles, etc. due to their significant advantages such as high power density, fast charge and discharge performance, and long cycle life. Asymmetric supercapacitors play a positive role in improving the energy density and power density of energy storage devices, and usually consist of a battery-type (pseudocapacitive) electrode and a capacitive electrode. Capacitive electrodes generally choose stable activated carbon materials, while pseudocapacitive electrodes usually choose electrochemically active oxides, sulfides, or conductive polyme...

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): C01G51/00H01G11/24H01G11/30B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G51/00C01G51/30C01P2006/40H01G11/24H01G11/30Y02E60/13
Inventor 颜果春董明霞张美辰李新海王志兴郭华军王接喜胡启阳彭文杰
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com