Method for preparing electrode materials with hollow carbon fibers coated with manganese dioxide

A manganese dioxide and carbon fiber technology, used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, can solve problems such as poor conductivity and application limitations of MnO2, and achieve high specific capacitance, mild conditions, and process economy. Effect

Active Publication Date: 2016-04-20
YANGZHOU UNIV
View PDF7 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an electrode material for supercapacitors, manganese dioxide is inexpensive, has excellent capacitive performance, and is environmentally friendly, but MnO 2 The conductivity is poor, making MnO 2 applications are limited
For example, Chinese invention patent No. 201410753892.2 introduces a MnO 2 / Preparation method of carbon airgel powder composite electrode material; Chinese invention patent with patent number 201310060380.3 introduces a nitrogen-containing mesoporous carbon / MnO 2 Composite materials and their preparation methods, for electrospinning to prepare hollow carbon fibers as carbon-based supports for the preparation of HCNFMnO 2 Electric grade materials have not been seen yet

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 electrode materials with hollow carbon fibers coated with manganese dioxide
  • Method for preparing electrode materials with hollow carbon fibers coated with manganese dioxide
  • Method for preparing electrode materials with hollow carbon fibers coated with manganese dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: MnO 2 The water heat load temperature is 40°C.

[0035] a. Weigh 0.45gMnSO 4 · h 2 O and 1gKMnO 4 Dissolve in 30mL deionized water respectively, and stir magnetically. When the solid is completely dissolved, the MnSO 4 · h 2 O solution poured into KMnO 4 solution, continue to stir until the mixture gradually turns into a brown-yellow suspension. Then it was transferred to a 100mL stainless steel hydrothermal reaction kettle and reacted at a constant temperature of 160°C for 24h. Then the precipitate in the kettle was filtered under reduced pressure, washed with ethanol and double distilled water for 3 times, and dried to obtain MnO 2 metal oxide nanorods.

[0036] b. Weigh 0.5g of PAN and dissolve it in 4.5gDMF, stir magnetically until it is completely dissolved, then add 0.5gMnO 2 Continue to stir the metal oxide nanorods until they are evenly mixed to obtain a spinning solution.

[0037] c. The ambient temperature of electrospinning is ≤40°C, a...

Embodiment 2

[0042] Example 2: MnO 2 The water heat load temperature is 60°C.

[0043] a. Weigh 0.45gMnSO 4 · h 2 O and 1gKMnO 4 Dissolve in 30mL deionized water respectively, and stir magnetically. When the solid is completely dissolved, the MnSO 4 · h 2 O solution poured into KMnO 4 solution, continue to stir until the mixture gradually turns into a brown-yellow suspension. Then it was transferred to a 100mL stainless steel hydrothermal reaction kettle and reacted at a constant temperature of 160°C for 24h. Then the precipitate in the kettle was filtered under reduced pressure, washed with ethanol and twice distilled water for 3 times, and dried to obtain MnO 2 metal oxide nanorods.

[0044] b. Weigh 0.5g of PAN and dissolve it in 4.5gDMF, stir magnetically until it is completely dissolved, then add 0.5gMnO 2 Continue to stir the metal oxide nanorods until they are evenly mixed to obtain a spinning solution.

[0045] c. The ambient temperature of electrospinning is ≤40°C, an...

Embodiment 3

[0050] Example 3: MnO 2 The water heat load temperature is 80°C.

[0051] a. Weigh 0.45gMnSO 4 · h 2 O and 1gKMnO 4 Dissolve in 30mL deionized water respectively, and stir magnetically. When the solid is completely dissolved, the MnSO 4 · h 2 O solution poured into KMnO 4 solution, continue to stir until the mixture gradually turns into a brown-yellow suspension. Then it was transferred to a 100mL stainless steel hydrothermal reaction kettle and reacted at a constant temperature of 160°C for 24h. Then the precipitate in the kettle was filtered under reduced pressure, washed with ethanol and twice distilled water for 3 times, and dried to obtain MnO 2 metal oxide nanorods.

[0052] b. Weigh 0.5g of PAN and dissolve it in 4.5gDMF, stir magnetically until it is completely dissolved, then add 0.5gMnO 2 Continue to stir the metal oxide nanorods until they are evenly mixed to obtain a spinning solution.

[0053] c. The ambient temperature of electrospinning is ≤40°C, an...

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 method for preparing electrode materials with hollow carbon fibers coated with manganese dioxide, and relates to the technical field of preparation of electrode materials. The method includes the steps that metal-oxide nanorods inside carbon fibers are washed away through acid, and the hollow carbon fibers are obtained; the surfaces of the carbon fibers are loaded with MnO2 with the hydrothermal method; polytetrafluoroethylene serves as a binding agent, acetylene black serves as an electric conduction assistant agent, foamed nickel serves as a current collector, and the HCNF@MnO2 electrode materials are prepared. According to the preparing process, the condition is mild, and the environment is friendly; economically, as cheap metal oxide is used, technology cost is reduced; the method is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials. technical background [0002] As a new green and pollution-free energy storage device, supercapacitors have attracted widespread attention because of their high energy density, power density, and excellent cycle performance. As an electrode material for supercapacitors, manganese dioxide is inexpensive, has excellent capacitive performance, and is environmentally friendly, but MnO 2 The conductivity is poor, making MnO 2 application is limited. MnO 2 Combining with carbon-based supports can effectively improve the conductivity of manganese dioxide and increase its capacitance. At present, the carbon-based supports that have been studied mainly include activated carbon, carbon airgel powder, carbon nanotubes, carbon black, graphene, and carbon fibers. For example, Chinese invention patent No. 201410753892.2 introduces a MnO 2 / Preparation method of carbon airgel p...

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): H01G11/30H01G11/40H01G11/46H01G11/86
CPCY02E60/13H01G11/86H01G11/30H01G11/40H01G11/46
Inventor 贾哲华徐继任赵有华董斌贾成浩陶翠
Owner YANGZHOU 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