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

Method for preparing super capacitor electrode material made of nickel oxide nanosheet grown on micro carbon tube

A technology of nickel oxide nanosheets and supercapacitors, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve problems such as unsatisfactory cycle stability, poor rate performance, and low conductivity, and achieve The effect of increasing the electrochemical reaction area, excellent rate performance, and improving conductivity

Inactive Publication Date: 2015-09-16
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure nickel oxide often has poor rate performance due to its low intrinsic conductivity during use.
In addition, in the process of repeated charging and discharging, nickel oxide itself will also undergo powder agglomeration and dramatic volume changes, so its capacity declines quickly and the cycle stability is not satisfactory.
Therefore, the current use of nickel oxide as a supercapacitor electrode material is still subject to certain restrictions.

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 super capacitor electrode material made of nickel oxide nanosheet grown on micro carbon tube
  • Method for preparing super capacitor electrode material made of nickel oxide nanosheet grown on micro carbon tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, soak the collected catkins in absolute ethanol solution, and ultrasonically disperse them for 10 minutes to obtain a cleaned catkin sample, then put the cleaned catkin sample into a carbonization furnace, and carbonize it at 500°C under an argon atmosphere to obtain carbon microtubes , and then 0.1g of carbon microtubes were added to 50ml of N,N-dimethylformamide, and ultrasonically obtained solution A; then 1g of Ni(NO 3 ) 2 ·6H 2 O powder was dissolved in 10ml of deionized water to form solution B. Then, solution A was slowly added to solution B dropwise under magnetic stirring. The obtained mixed solution was transferred to a reaction kettle and heated at 100° C. for 36 h. After the reaction was completed, the obtained product was suction-filtered, washed and dried. Finally, under an argon atmosphere, calcined at 150°C for 4 hours to obtain a specific surface area of ​​189m 2 g -1 , NiO nanosheet / carbon microtube composite material with NiO loading rate o...

Embodiment 2

[0025] First, soak the collected catkins in absolute ethanol solution, and ultrasonically disperse them for 10 minutes to obtain a cleaned catkin sample, then put the cleaned catkin sample into a carbonization furnace, and carbonize it at 1000°C under a nitrogen atmosphere to obtain carbon microtubes. Then take 0.5g of carbon microtubes and add them to 100ml of N,N-dimethylformamide, and obtain solution A through ultrasonication; then add 1g of Ni(NO 3 ) 2 ·6H 2 O powder was dissolved in 100ml of deionized water to form solution B. Under vigorous stirring of the emulsifier, slowly add solution A to solution B drop by drop. The obtained mixed solution was transferred to a reaction kettle and heated at 180° C. for 18 hours. After the reaction was completed, the obtained product was suction-filtered, washed, and dried at 60° C. Finally, under a nitrogen atmosphere, calcined at 500°C for 4 hours to obtain a specific surface area of ​​180m 2 g -1 , NiO nanosheet / carbon microtu...

Embodiment 3

[0028] First, soak the collected catkins in absolute ethanol solution, and ultrasonically disperse them for 10 minutes to obtain a cleaned catkin sample, then put the cleaned catkin sample into a carbonization furnace, and carbonize it at 600°C under a nitrogen atmosphere to obtain carbon microtubes. Then get 0.3g of micro-carbon tubes and join them in 100ml of N,N-dimethylformamide, through ultrasonication, to obtain solution A; then add 1g of Ni(NO 3 ) 2 ·6H 2 O powder was dissolved in 80ml of deionized water to form solution B. Add solution A to solution B slowly drop by drop under the condition of strong stirring in a cell grinder. The obtained mixed solution was transferred to a reaction kettle, and heated at 250°C for 12 hours. After the reaction, the obtained product was suction-filtered, washed, and dried at 60°C. Finally, under a nitrogen atmosphere, calcined at 500°C for 4 hours to obtain a specific surface area of ​​186m 2 g -1 , the nickel oxide nanosheet / carb...

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

A method for preparing a super capacitor electrode material made of a nickel oxide nanosheet grown on a micro carbon tube. The method comprises the following steps: cleaning collected willow catkins, putting the willow catkins in a carbonization furnace, and carbonizing the willow catkins under protective atmosphere to obtain a micro carbon tube; adding the micro carbon tube to N,N-dimethyl formamide, and carrying out ultrasonic processing to obtain a solution A; dissolving Ni(NO3)2.6H2O powder in deionized water to form a solution B, slowly adding the solution A to the solution B drop by drop for hydrothermal reaction, and cooling the mixed solution to room temperature; washing a product obtained in the previous step with deionized water, drying the product, and calcining the product under protective atmosphere to obtain a final product. The method of the invention has the advantages of simple process, mild preparation conditions, simple operation, low energy consumption, good rate performance, and good cycle performance.

Description

[0001] Field [0002] The invention belongs to a preparation method of a capacitor electrode material, in particular to a preparation method of a supercapacitor electrode material in which nickel oxide nanosheets are grown on micro carbon tubes. technical background [0003] With the increasing consumption of conventional energy and global warming, cheap and clean energy has become an object widely pursued by scientists. Among them, due to the advantages of fast charge and discharge rate, high power density, and good cycle performance (up to 50,000 to 500,000 times of charge and discharge), supercapacitors are widely used in electric vehicles, hybrid vehicles, special trucks, solar and wind power generation, It has important applications in many fields such as military field and consumer electronics, and is considered to be one of the most promising green energy storage devices that can be recycled repeatedly. In order to meet the requirements of high specific power and speci...

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): H01G11/32H01G11/46
CPCY02E60/13H01G11/86H01G11/32H01G11/46
Inventor 陈成猛谢莉婧孔庆强苏方远李晓明刘卓
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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