Carbon fiber-coated manganese oxide-carbon composite material with egg yolk shell structure as well as preparation method and application thereof

A carbon composite material, egg yolk shell technology, applied in structural parts, electrochemical generators, electrical components, etc., can solve the problems of easy collapse and agglomeration of electrode material structure, rapid decrease in specific capacity, rupture of active materials, etc. Good, prolong battery life, reduce the effect of volume expansion

Inactive Publication Date: 2019-04-12
SUZHOU UNIV
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After repeated charging and discharging cycles, the matrix will produce tiny cracks; as the number of cycles increases, the cracks will gradually become larger, causing the active material to break and pulverize, eventually leading to the failure of the material
[0003] Manganese oxide is commonly used as the negative electrode material of lithium-ion batteries. Since the electrode material structure of manganese oxide is easy to collapse and agglomerate during the charge-discharge cycle, as the number of charge-discharge cycles increases, it will lead to a rapid decline in specific capacity and shorten the battery life. severely shortened

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
  • Carbon fiber-coated manganese oxide-carbon composite material with egg yolk shell structure as well as preparation method and application thereof
  • Carbon fiber-coated manganese oxide-carbon composite material with egg yolk shell structure as well as preparation method and application thereof
  • Carbon fiber-coated manganese oxide-carbon composite material with egg yolk shell structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 0.1875g of manganese nitrate tetrahydrate, dissolve it in 50mL of ethanol, and configure it as solution A; then take 0.0875g of trimesic acid, dissolve it in 30mL of ethanol, and configure it as solution B. Solution B was added to solution A and stirred for 20 minutes. The obtained mixed solution was placed in a 100 mL reaction kettle, and then the reaction kettle was put into a constant temperature drying oven, and kept at 160° C. for 24 hours. After the reaction is completed, the solution in the reactor is centrifuged to obtain metal organic framework powder.

[0033] 0.5 g of polyacrylonitrile was dissolved in 9.75 g of N,N-dimethylformamide, 0.25 g of metal-organic framework powder was dispersed in the above solution, and stirred for 12 h to obtain a suspension. Next, the above suspension was transferred into a 10 mL syringe, and electrospinning was performed at a voltage of 17 KV at a propulsion rate of 13 μL / min. Move the spun film into a muffle furnace, ra...

Embodiment 2

[0035] Take 0.1875g of manganese nitrate tetrahydrate, dissolve it in 50mL of ethanol, and configure it as solution A; then take 0.0875g of trimesic acid, dissolve it in 30mL of ethanol, and configure it as solution B. Solution B was added to solution A and stirred for 20 minutes. The obtained mixed solution was placed in a 100 mL reaction kettle, and then the reaction kettle was put into a constant temperature drying oven, and kept at 160° C. for 24 hours. After the reaction is completed, the solution in the reactor is centrifuged to obtain metal organic framework powder.

[0036] 0.5 g of polyacrylonitrile was dissolved in 9.75 g of N,N-dimethylformamide, 0.5 g of metal-organic framework powder was dispersed in the above solution, and stirred for 12 h to obtain a suspension. Next, the above suspension was transferred into a 10 mL syringe, and electrospinning was performed at a voltage of 17 KV at a propulsion rate of 13 μL / min. Move the spun film into a muffle furnace, rai...

Embodiment 3

[0038] Take 0.1875g of manganese nitrate tetrahydrate, dissolve it in 50mL of ethanol, and configure it as solution A; then take 0.0875g of trimesic acid, dissolve it in 30mL of ethanol, and configure it as solution B. Solution B was added to solution A and stirred for 20 minutes. The obtained mixed solution was placed in a 100 mL reaction kettle, and then the reaction kettle was put into a constant temperature drying oven, and kept at 160° C. for 24 hours. After the reaction is completed, the solution in the reactor is centrifuged to obtain metal organic framework powder.

[0039] 0.5 g of polyacrylonitrile was dissolved in 9.75 g of N,N-dimethylformamide, 1.0 g of metal-organic framework powder was dispersed in the above solution, and stirred for 12 h to obtain a suspension. Next, the above suspension was transferred into a 10 mL syringe, and electrospinning was performed at a voltage of 17 KV at a propulsion rate of 13 μL / min. Move the spun film into a muffle furnace, rai...

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
concentrationaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a carbon fiber-coated manganese oxide-carbon composite material with an egg yolk shell structure as well as a preparation method and an application thereof. The preparation method comprises the following steps of preparing a powdery manganese-containing metal organic framework material, and carrying out mixing and electrostatic spinning with polyacrylonitrile to obtain a composite nanofiber membrane; and sequentially carrying out pre-oxidation and carbonization on the composite nanofiber membrane to obtain the manganese oxide-carbon composite material. The invention further provides the manganese oxide-carbon composite material prepared by the preparation method, and an application of the composite material used as a thin film electrode. According to the manganese oxide-carbon composite material, the dispersibility of the particles in the fiber is high, the operation is convenient, the carbon layer of the fiber can effectively protect the internal active substance, and the unique egg yolk shell structure is beneficial to improving the stability of the material in the aspect of a lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a carbon fiber-wrapped manganese oxide-carbon composite material with egg yolk shell structure, its preparation method and application. Background technique [0002] Lithium-ion batteries have become the most widely used secondary batteries in the world today because of their high energy density, long cycle life, and no memory effect. In addition to being used in various small portable electronic devices, lithium-ion batteries are also gradually moving towards large-scale applications such as electric vehicles and renewable energy storage systems, which also affect the energy density, power density, and cycle life of lithium-ion batteries. And safety performance and other performance put forward higher requirements. Today's lithium-ion battery electrode materials are facing problems such as short life and low capacity. During the multiple charge and discharge cycles...

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): H01M4/36H01M4/50H01M4/62H01M10/0525
CPCH01M4/366H01M4/502H01M4/628H01M10/0525Y02E60/10
Inventor 杨成彭扬赵晓辉
Owner SUZHOU 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