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

Super capacitor device containing millet-husk-based porous active carbon material

A supercapacitor and activated carbon technology, applied in the field of electrochemical applications, can solve the problems of poor control of mesopore ratio, high cost of porous carbon, and attenuation of specific capacitance value, and achieve good wettability, high energy density, and improved energy density. Effect

Inactive Publication Date: 2017-01-04
YANGZHOU UNIV
View PDF5 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activated carbon used in the above patents has poor ability to control the proportion of micropores and mesopores, and its specific capacitance value decays relatively seriously under high current density, so it is not suitable for use under high current operating conditions, and its energy density is low.
Hou Jianhua and others used silk as raw material and used FeCl 3 and ZnCl 2 Graphitization-activation of raw materials, the specific surface area of ​​the obtained activated carbon material reaches 2494m 2 / g, as a capacitor electrode material, it shows good stability and high energy density, but the price of silk is too expensive, and the cost of preparing porous carbon is high (ACS Nano.2015, 9, 2556-2564)

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
  • Super capacitor device containing millet-husk-based porous active carbon material
  • Super capacitor device containing millet-husk-based porous active carbon material
  • Super capacitor device containing millet-husk-based porous active carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Mix the dried millet skin and ammonium dihydrogen phosphate uniformly, with a mass ratio of 1:2, and then use microwaves to activate carbonization under the protection of an inert gas. minute;

[0036] Step 2: Carbonize and activate the black powder, add distilled water, filter and wash until the pH value is 6.4-7, and then dry, and the obtained powder is the prepared millet bark-based porous activated carbon material;

[0037] Step 3: prepare millet-based porous activated carbon material and PTFE by microwave method, add distilled water to mix into slurry according to the ratio of mass ratio 97:3, and repeatedly roll the thin sheet electrode material obtained by slurry, and the electrode material Put it on a current collector of a corresponding size, cold press it at 5 MPa for 20 seconds, and then dry it at 120°C to obtain an electrode sheet for a supercapacitor, wherein the electrode material is greater than 14 mg per square centimeter;

[0038] Step 4: Assem...

Embodiment 2

[0041] Step 1: Mix the dried millet skin and ammonium hydrogen phosphate uniformly, the mass ratio is 1:1.5, and then use microwave to activate carbonization under the protection of inert gas, the power is 900W, microwave radiation for 30 minutes, and then use microwave to keep warm for 5 minutes ;

[0042] Step 2: Carbonize and activate the black powder, add distilled water, filter and wash until the pH value is 6.4-7, and then dry, and the obtained powder is the prepared millet bark-based porous activated carbon material;

[0043] Step 3: Prepare millet-based porous activated carbon material and styrene-butadiene rubber by microwave method, add distilled water and mix them into slurry according to the ratio of mass ratio 96:4, and repeatedly roll the thin sheet-shaped electrode material obtained by slurry. The electrode material is placed on a current collector of a corresponding size, cold-pressed at 5 MPa for 30 seconds, and then dried at 120°C to obtain an electrode sheet...

Embodiment 3

[0047] Step 1: Mix the dried millet skin and ammonium dihydrogen phosphate uniformly, the mass ratio is 1:2, and then use microwave to activate carbonization under the protection of inert gas, the power is 800W, microwave radiation for 50 minutes, and then use microwave to keep warm minute;

[0048] Step 2: Carbonize and activate the black powder, add distilled water, filter and wash until the pH value is 6.4-7, and then dry, and the obtained powder is the prepared millet bark-based porous activated carbon material;

[0049] Step 3: Prepare millet bark-based porous activated carbon material and carboxymethyl cellulose by microwave method, add distilled water to mix into slurry according to the ratio of mass ratio 96:4, and repeatedly roll the thin sheet-shaped electrode material obtained by slurry. The electrode material is placed on a current collector of a corresponding size, cold-pressed at 3 MPa for 60 seconds, and then dried at 120°C to obtain an electrode sheet for a sup...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a super capacitor device containing a millet-husk-based porous active carbon material. The millet-husk-based porous active carbon material is prepared by uniformly mixing dried millet husks and an activator, performing carbonization and activation with a microwave device in the protection of an inert gas, adding distilled water to obtained black powder for suction filtration washing till the pH value is 6.4-7, and performing drying to obtain black powder. The black powder is the prepared millet-husk-based porous active carbon material. The millet-husk-based porous active carbon material (an active substance) prepared through the microwave method is mixed with a binder according to a certain mass ratio, distilled water is added for mixing to prepare a thick liquid, and the thick liquid is repeatedly rolled to obtain a sheet electrode material. The electrode material is put on a current collector with the corresponding size, cold pressing is carried out at 1-40 Mpa for 10-200 s, and drying is performed at 120 DEG C to obtain an electrode plate of the super capacitor device. The electrode material in the electrode plate is more than 14 mg per square centimeter. An electrode plate, a membrane, and an electrode plate are assembled into a sandwich structure, then different electrolytes are dropwise added, so that the super capacitor device is assembled.

Description

technical field [0001] The invention provides a supercapacitor device of a millet-based porous activated carbon material, which belongs to the field of electrochemical applications. Background technique [0002] With the depletion of fossil resources and the aggravation of environmental problems, human beings urgently need clean, efficient and sustainable energy, as well as related new energy conversion and storage technologies. The common feature of lead-acid, nickel-cadmium, nickel-metal hydride, and lithium-ion batteries currently on the market is that they have high energy density, but the power density is very low and the charging time is long, so it is difficult to meet the storage requirements for high power density. field of application of the device. Therefore, people expect to develop a new type of green energy storage device with high energy density, high power density and long life. [0003] Supercapacitors, also known as electrochemical capacitors, are a new t...

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): C01B31/08H01G11/32
CPCY02E60/13H01G11/32C01P2004/03C01P2004/04C01P2006/12C01P2006/14C01P2006/40
Inventor 侯建华王徐林李想吴秉寰陈思雨金晶
Owner YANGZHOU 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