Manufacturing method of NiO@graphene fibre supercapacitor electrode material

A graphene fiber, supercapacitor technology, used in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, etc., can solve the problems of low energy density, low specific capacitance value of capacitive devices, and limit potential applications, and achieve excellent specific capacitance. , Improve the effect of specific capacitance and high specific capacity

Active Publication Date: 2017-08-29
ZHEJIANG UNIV
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure graphene fiber materials usually have low specific capacitance value, and capacitor devices have low energy density, which limits its wide potential applications.

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
  • Manufacturing method of NiO@graphene fibre supercapacitor electrode material
  • Manufacturing method of NiO@graphene fibre supercapacitor electrode material
  • Manufacturing method of NiO@graphene fibre supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Concentrate the graphene oxide aqueous dispersion by centrifugation, and then ultrasonically treat it for 20 minutes to obtain a graphene oxide spinning solution;

[0028] (2) Use a syringe pump to inject the graphene oxide spinning solution into the 2 In the coagulation bath composed of / ethanol solution, after immersion in the coagulation bath for 30min, the obtained fiber was repeatedly washed 3 times with deionized water and ethanol, and the residual coagulation solution was washed away, so as to obtain graphene oxide fiber and collect it on the support , drying the collected fibers at high temperature under vacuum conditions;

[0029] (3) The graphene oxide fibers were reduced in hydroiodic acid at 120 °C for 8 h, and then 2 / Ar (volume ratio 1:1) in a reducing atmosphere of 1000 ° C thermal reduction, natural cooling to room temperature and then take out the fiber to prepare graphene fiber;

[0030] (4) Mix nickel sulfate hexahydrate, sodium hydroxide and wa...

Embodiment 2

[0033] (1) Concentrate the graphene oxide aqueous dispersion by centrifugation, and then ultrasonically treat it for 30 minutes to obtain a graphene oxide spinning solution;

[0034] (2) Use a syringe pump to inject the graphene oxide spinning solution into the 2 In the coagulation bath composed of / ethanol solution, after immersion in the coagulation bath for 20min, the obtained fiber was repeatedly washed 3 times with deionized water and ethanol, and the residual coagulation solution was washed away, so as to obtain graphene oxide fiber and collect it on the support , drying the collected fibers at high temperature under vacuum conditions;

[0035] (3) The graphene oxide fibers were reduced in hydroiodic acid at 90 °C for 12 h, and then 2 / Ar (volume ratio 1:4) in a reducing atmosphere of 1000 ° C thermal reduction, natural cooling to room temperature and then take out the fiber to prepare graphene fiber;

[0036] (4) Mix nickel sulfate hexahydrate, sodium hydroxide and wa...

Embodiment 3

[0039] (1) Concentrate the graphene oxide aqueous dispersion by centrifugation, and then ultrasonically treat it for 30 minutes to obtain a graphene oxide spinning solution;

[0040] (2) Use a syringe pump to inject the graphene oxide spinning solution into the 2 In the coagulation bath composed of / ethanol solution, after immersing in the coagulation bath for 30min, the obtained fiber was repeatedly washed 5 times with deionized water and ethanol, and the residual coagulation solution was washed away, so as to obtain graphene oxide fiber and collect it on the support , drying the collected fibers at high temperature under vacuum conditions;

[0041] (3) The graphene oxide fibers were reduced in hydroiodic acid at 120 °C for 12 h, and then 2 / Ar (volume ratio 1:2) in a reducing atmosphere of 1000 ° C thermal reduction, natural cooling to room temperature and then take out the fiber to prepare graphene fiber;

[0042] (4) Mix nickel sulfate hexahydrate, sodium hydroxide and wa...

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
electrical resistanceaaaaaaaaaa
Login to view more

Abstract

The invention discloses a manufacturing method of a NiO@graphene fibre supercapacitor electrode material. The manufacturing method comprises the following steps of carrying out reduction and oxidation on graphene, and acquiring a graphene fiber; and on a surface of the graphene fiber, through a hydrothermal method, cladding and growing NiO and the like. A microstructure of the manufactured NiO@graphene fibre supercapacitor electrode material is a NiO cladding graphene fiber which possesses a large specific surface area. A specific surface area of an electrode and a space utilization rate are effectively increased, and a specific capacitance, a rate capability and electrochemical stability of the electrode material are increased too. In a super-capacitor three-electrode system test, the material manufactured in the invention shows a 134Fg<-1> high specific capacity under a 2Ag<-1> current density and possesses good electrochemical performance. The manufacturing method possesses advantages that the method is simple; and cost is low and so on.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to a supercapacitor electrode material and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, the continuous consumption of fossil energy, and the increasing environmental pollution, it is becoming more and more important to study a high-efficiency, low-cost, environmentally friendly, and high-performance energy conversion and storage system. Supercapacitors have attracted much attention due to their high energy rate density, wide operating temperature range, long life, and environmental friendliness. It has important and broad application prospects and has become a research hotspot all over the world. [0003] Supercapacitor is a kind of electrochemical capacitor, which can be divided into two types according to the charge storage mechanism: one type of electrochemical double layer capacitor, the electrode material of this...

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): H01G11/30H01G11/36H01G11/46H01G11/24H01G11/86
CPCY02E60/13H01G11/30H01G11/24H01G11/36H01G11/46H01G11/86
Inventor 吕建国王伟成
Owner ZHEJIANG UNIV
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