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

Method for preparing three-dimensional structure Co-MOF/NF supercapacitor electrode material in situ based on foamed nickel

A technology for supercapacitors and electrode materials, applied in the field of electrochemical energy storage, can solve problems such as large contact resistance, insufficient application of active materials, cumbersome electrode preparation process, etc., to reduce contact resistance and simplify the preparation process Easy operation and short reaction cycle

Inactive Publication Date: 2018-09-04
SICHUAN UNIV
View PDF2 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is to overcome the disadvantages of large contact resistance brought by powder electrode materials, insufficient application of active materials, cumbersome electrode preparation process, etc., and directly grow MOF materials in situ on conductive substrates to obtain Binder-based three-dimensional electrode material for supercapacitors showing extremely high electrochemical energy storage properties

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 three-dimensional structure Co-MOF/NF supercapacitor electrode material in situ based on foamed nickel
  • Method for preparing three-dimensional structure Co-MOF/NF supercapacitor electrode material in situ based on foamed nickel
  • Method for preparing three-dimensional structure Co-MOF/NF supercapacitor electrode material in situ based on foamed nickel

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] (1) Material preparation: 0.291 g cobalt nitrate hexahydrate and 0.166 g terephthalic acid, the molar ratio is 1:1, measure 35 mL N,N-dimethylformamide as solvent, 5 mL absolute ethanol as additive, One piece measures 2×3 cm 2 Nickel foam was pretreated with ethanol, 5% dilute hydrochloric acid and deionized water for 10 min respectively;

[0024] (2) Reaction: Pour the above prepared solution into a 50 mL polytetrafluoroethylene autoclave, then put a piece of processed nickel foam into the autoclave, seal the autoclave, place it in an oven, and Reaction at 125 ℃ for 12 h;

[0025] (3) Washing: After the reaction is completed, cool the polytetrafluoroethylene autoclave to room temperature in the air, take out the nickel foam evenly covered by the dark yellow substance, and wash it with N,N-dimethylformamide and absolute ethanol respectively. rinse three times;

[0026] (4) Drying: The washed product was vacuum-dried at 60 °C for 8 h to obtain the Co-MOF / NF electrode ...

example 2

[0029] (1) Material preparation: 0.582 g cobalt nitrate hexahydrate and 0.332 g terephthalic acid, the molar ratio is 1:1, measure 70 mL N,N-dimethylformamide as solvent, and 10 mL absolute ethanol as additive , a piece with a size of 2×3 cm 2 Nickel foam was pretreated with ethanol, 5% dilute hydrochloric acid and deionized water for 10 min respectively;

[0030] (2) Reaction: Pour the above-mentioned prepared solution into two 100mL polytetrafluoroethylene autoclaves, then put the pre-treated foamed nickel into the autoclave, and seal the autoclave, place it in the oven, React at 125 °C for 12 h;

[0031] (3) Washing: After the reaction is completed, cool the polytetrafluoroethylene autoclave to room temperature in the air, take out the nickel foam evenly covered by the dark yellow substance, and wash it with N,N-dimethylformamide and absolute ethanol respectively. rinse three times;

[0032] (4) Drying: The washed product was vacuum-dried at 60 °C for 8 h to obtain the C...

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 simple, easy-to-operate and environmentally friendly method for synthesizing a three-dimensional structure Co-MOF / NF material in situ. With a cobalt nitrate hexahydrate adopted as a cobalt source, terephthalic acid as an organic ligand, N,N-dimethylformamide as a solvent, absolute ethyl alcohol as an additive, and foamed nickel as a substrate, a one-step solvothermal method is adopted to obtain Co-MOF / NF; when being used as supercapacitor self-supporting electrode material, the Co-MOF / NF exhibits ultra-high area ratio capacitance (13.6 F cm<-2>), the performance of the Co-MOF / NF is far superior to the performance of previously reported MOF-based materials. With the method of the invention adopted, problems such as large contact resistance, insufficient applicationof active materials, and complex electrode preparation processes which are caused by the application of powder electrode materials can be solved. The Co-MOF / NF material is a novel energy storage material which has the advantages of ultra-high area specific capacitance, excellent rate performance and low cost.

Description

technical field [0001] The invention relates to the in-situ preparation of Co-MOF / NF with a three-dimensional structure on nickel foam (NF) by cobalt-based-metal-organic framework (Co-MOF), and the application of the material in the field of electrochemical energy storage. High-performance Co-MOF / NF supercapacitor electrode materials can be prepared by only a simple and environmentally friendly one-step solvothermal method. Background technique [0002] Metal-organic framework (MOF) is a crystalline material with a porous network structure formed by coordination between metal ions or metal oxide clusters and organic ligands. It has various structures, high porosity, large specific surface area, and easy function It is favored in many fields such as gas adsorption or storage, drug separation, optoelectronics, and catalysis ( J. Mater. Chem. A, 2016, April, 19078–19085; ACS Appl. Mater. Interfaces, 2016, 8, 4585−4591.). In recent years, it has also been gradually applied...

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
IPC IPC(8): H01G11/30H01G11/86H01G11/26
CPCY02E60/13H01G11/30H01G11/26H01G11/86
Inventor 姚亚东马敏王伟怡
Owner SICHUAN 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