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

Composite electrode material vanadium trioxide or carbon for super capacitor and preparation method thereof

A technology for supercapacitors and composite electrodes, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as poor cycle performance, improve specific capacity, improve bulk conductivity, and be suitable for large-scale production Effect

Active Publication Date: 2014-10-01
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials have the advantages of high specific surface area, low cost, and good cycle performance, but their low specific capacitance limits the commercial development of carbon-based electrode materials, and pseudocapacitance (including metal oxide and conductive polymer capacitors) is obtained through the surface of the material. Redox reactions occur to realize charge transfer and storage. Compared with electric double layer energy storage, its ability to store charges is greatly enhanced, and its specific capacity can reach 10 to 100 times that of carbon electrode materials. However, due to the pseudocapacitance in the energy storage process It is often accompanied by the intercalation and extraction of ions, so its cycle performance is not good

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
  • Composite electrode material vanadium trioxide or carbon for super capacitor and preparation method thereof
  • Composite electrode material vanadium trioxide or carbon for super capacitor and preparation method thereof
  • Composite electrode material vanadium trioxide or carbon for super capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] In an exemplary embodiment of the present invention, the composite electrode material V 2 o 3 The preparation method of nanosheet / C comprises the following steps:

[0021] A. Preparation of activated carbon source

[0022] The carbon source is obtained by carbonizing the phenolic resin at high temperature under the protection of an inert gas (for example, argon). For example, the temperature of high temperature carbonization may be 800-1000° C., preferably 850-920° C., and the carbonization time is 3-4 hours.

[0023] Subsequently, with 3~6mol / L HNO 3 The carbon source is activated by the solution at a water bath temperature of 70-100° C. (preferably 80-90° C.), then centrifuged and washed with distilled water (for example, to a pH of 7), and then dried. For example, the drying temperature can be 60-90°C, preferably 75-84°C, to obtain the activated carbon source.

[0024] Here, in the activation step, nitric acid activation can remove some impurities on the surface...

example 1

[0055] (1) Carbonize the phenolic resin in a vacuum tube furnace at 800°C for 3h, and then use 3mol / L HNO 3 Condensate and reflux at 100°C for 6 hours to fully activate, cool, centrifuge, wash, and dry at 80°C to obtain a carbon source for use;

[0056] (2) Weigh 4g CTAB and add it to 20mL deionized water, heat it in a 70°C water bath to dissolve;

[0057] (3) Weigh 0.512g of carbon and add it to 20ml of CTAB micellar solution with a concentration of 0.2g / ml and ultrasonically shake for 30min to fully disperse it;

[0058] (4) Weigh 2.42g NH 4 VO 3 Stir to dissolve it in 100mL, 70°C deionized water;

[0059] (5) Heat the mixed solution in (3) and (4) in a water bath at 70°C for 3 hours with magnetic stirring;

[0060] (6) Calcining the lower layer solid reacted in (5) under the protection of argon at 800°C for 3 hours to obtain V 2 o 3 Nanosheet / C composite electrode materials. will prepare the V 2 o 3 The nanosheet / C composite electrode material sample, acetylene black...

example 2

[0063] (1) Carbonize the phenolic resin in a vacuum tube furnace at 800°C for 3h, then use 3mol / L HNO 3 Condensate and reflux at 100°C for 6 hours to fully activate, cool, centrifuge, wash, and dry at 80°C to obtain a carbon source for use;

[0064] (2) Weigh 6g of CTAB and add it to 20mL deionized water, heat it in a water bath at 70°C to dissolve;

[0065] (3) Weigh 1.157g of carbon and add it to 20ml of CTAB micellar solution with a concentration of 0.3g / ml and ultrasonically shake for 30min to fully disperse it;

[0066] (4) Weigh 2.42g NH 4 VO 3 Stir to dissolve it in 100mL, 70°C deionized water;

[0067] (5) Heat the mixed solution in (3) and (4) in a water bath at 70°C for 3 hours with magnetic stirring;

[0068] (6) Calcining the lower layer solid reacted in (5) under the protection of argon at 800°C for 3 hours to obtain V 2 o 3 Nanosheet / C composite electrode materials.

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
Specific surface areaaaaaaaaaaa
Specific capacitanceaaaaaaaaaa
Login to View More

Abstract

The invention provides a composite electrode material V2O3 or C for a super capacitor and a preparation method thereof. The preparation method of the composite electrode material comprises the following steps: phenolic resin is carbonized to obtain a carbon source and the carbon source is reactivated; a cationic surfactant is prepared into a micellar solution; the carbon source and the micellar solution are mixed and subjected to ultrasonic concussion to obtain a carbon source micelle mixed liquor; an NH4VO3 solution and the carbon source micelle mixed liquor are mixed; the mass ratio of NH4VO3 to the carbon source is controlled at 0.9-5 to 1; the mixture of the NH4VO3 solution and the carbon source micelle mixed liquor reacts under the stirring and water bath condition and at the temperature of 60-70 DEG C and the obtained mixture is decomposed to obtain solid reactant; the solid reactant is calcinated into V2O3 nano-sheet or C composite electrode material. According to the invention, the composite electrode material with nano-sheet structure V2O3 vertically coated on the surface of the carbon particles can be obtained, the specific surface area is high, the conductive property of the main body is good, the specific capacity is high and the V2O3 composite electrode material is a superior composite electrode material for the super capacitor; moreover, the preparation technology is simple, the recurrence rate is high, the cost is low and the composite electrode material V2O3 is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of electrode materials for supercapacitors, in particular to a composite electrode material V 2 o 3 Nanosheet / C, the composite electrode material V 2 o 3 The preparation method of nano sheet / C, and comprise this composite electrode material V 2 o 3 Nanosheet / C supercapacitor and its preparation method. Background technique [0002] Energy is the material basis for human survival and development. Currently, human beings are facing serious energy shortages. With the rapid development of the global economy, the continuous consumption of fossil energy, and the increasingly serious 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 power density, wide operating temperature range, long life, and environmental fr...

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): H01G11/46H01G11/32H01G11/86
CPCY02E60/13
Inventor 李鸿乂焦凯汪亮杨林江谢兵
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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