Supercharge Your Innovation With Domain-Expert AI Agents!

Manganous-manganic oxide-graphene sheet nano-compound, as well as preparation method and application thereof

A nano-composite, manganese tetroxide technology, applied in the directions of carbon compounds, chemical instruments and methods, manganese oxide/manganese hydroxide, etc., can solve the problem of complex modification methods and preparation methods, time-consuming and energy-consuming, cycle Poor stability and other problems, to achieve the effect of accelerating reaction kinetics, small size, and strong structural stability

Inactive Publication Date: 2019-06-28
UNIVERSITY OF MACAU
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, trimanganese tetraoxide is used as a negative electrode material, and there are still problems in the cycle stability caused by poor electrical conductivity and large volume expansion during charging and discharging; and the modification method of trimanganese tetraoxide material in the prior art And preparation method process is loaded down with trivial details, consumes more time and energy consumption

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
  • Manganous-manganic oxide-graphene sheet nano-compound, as well as preparation method and application thereof
  • Manganous-manganic oxide-graphene sheet nano-compound, as well as preparation method and application thereof
  • Manganous-manganic oxide-graphene sheet nano-compound, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of trimanganese tetraoxide-graphene sheet nanocomposite described in the present embodiment is specifically as follows:

[0042] (1) Put 0.2 g of graphene sheets in a 100 mL beaker, add 50 mL of deionized water, and ultrasonically dissolve to obtain a graphene sheet solution.

[0043] (2) Add 0.2 g of manganese chloride tetrahydrate into the graphene sheet solution, ultrasonically dissolve, and stir at room temperature for 30 minutes to obtain a manganese salt graphene sheet reaction solution.

[0044] (3) 0.2 g of potassium permanganate was dissolved in 10 ml of deionized water, and ultrasonically dissolved to obtain a potassium permanganate solution.

[0045] (4) Mix the products of step (2) and step (3), stir and react at 60° C. for 0.5 hour, precipitate, wash, and dry to obtain a manganese oxide-graphene sheet composite.

[0046] (5) heat-treating the manganese oxide-graphene sheet composite obtained in step (4) at 250° C. for 4 h in a nitrog...

Embodiment 2

[0051] The preparation method of trimanganese tetraoxide-graphene sheet nanocomposite described in the present embodiment is specifically as follows:

[0052] (1) Put 0.1 g of graphene sheets in a 100 mL beaker, add 50 mL of ethanol, and ultrasonically dissolve to obtain a graphene sheet solution.

[0053] (2) Add 0.2 g of manganese chloride tetrahydrate into the graphene sheet solution, ultrasonically dissolve, and stir at room temperature for 30 minutes to obtain a manganese salt graphene sheet reaction solution.

[0054] (3) Dissolve 0.3 g of potassium permanganate in 10 ml of ethanol, and ultrasonically dissolve to obtain potassium permanganate solution.

[0055] (4) Mix the products of step (2) and step (3), stir and react at 60° C. for 0.5 hour, precipitate, wash, and dry to obtain a manganese oxide / graphene sheet composite.

[0056] (5) heat-treating the manganese oxide / graphene sheet composite obtained in step (4) at 250° C. for 4 h in a nitrogen atmosphere to obtain ...

Embodiment 3

[0060] The preparation method of trimanganese tetraoxide-graphene sheet nanocomposite described in the present embodiment is specifically as follows:

[0061] (1) Put 0.5 g of graphene sheets in a 100 mL beaker, add 50 mL of isopropanol, and ultrasonically dissolve to obtain a graphene sheet solution.

[0062] (2) 0.1 g of manganese sulfate was added to the graphene sheet solution, ultrasonically dissolved, and stirred at room temperature for 30 minutes to obtain a manganese salt graphene sheet reaction solution.

[0063] (3) Dissolve 0.2 g of potassium permanganate in 10 ml of isopropanol, and ultrasonically dissolve to obtain a potassium permanganate solution.

[0064] (4) Mix the products of step (2) and step (3), stir and react at 60° C. for 0.5 hour, precipitate, wash, and dry to obtain a manganese oxide / graphene sheet composite.

[0065] (5) heat-treating the manganese oxide / graphene sheet composite obtained in step (4) at 250° C. for 4 h in a nitrogen atmosphere to obt...

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 capacityaaaaaaaaaa
Specific capacityaaaaaaaaaa
Specific capacityaaaaaaaaaa
Login to View More

Abstract

The invention provides a manganous-manganic oxide-graphene sheet nano-compound, as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing a graphene sheet, manganese salt and potassium permanganate in a solvent, stirring and reacting to obtain precipitate; drying the precipitate to obtain a manganite-graphene sheet compound; heating the manganite-graphene sheet compound in an inert atmosphere to obtain the manganous-manganic oxide-graphene sheet nano-compound. In the manganous-manganic oxide-graphene sheet nano-compound, manganous-manganic oxide exists in a nano-cluster mode, has small size but large specific surface area, and certain action force existing between the manganous-manganic oxide and the graphene sheet is loaded on the graphene sheet with good dispersibility and large specific surface area, and a lithium ion battery prepared from the nano-compound has relatively high specific capacity and strong cycling stability.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a trimanganese tetraoxide-graphene sheet nanocomposite and a preparation method and application thereof. Background technique [0002] Today's society is suffering from more and more serious environmental problems and energy crises, and seeking a green and sustainable development path has increasingly become an urgent problem for manufacturers, especially the energy industry that is highly dependent on fossil resources. Rechargeable batteries play an important role in energy storage devices. Lithium-ion batteries have been widely used in portable electronic devices due to their superior properties such as high energy density, long cycle life, no memory effect, and environmental friendliness. [0003] At present, commercial lithium-ion batteries mainly use artificial graphite as the negative electrode material. However, graphite has a relatively low ...

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): C01G45/02C01B32/194B82Y30/00H01M4/36H01M4/50H01M4/583H01M10/0525
CPCY02E60/10
Inventor 邵怀宇
Owner UNIVERSITY OF MACAU
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com