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

Carbon-coated Na0.55 Mn2O4.1.5H2O nanocomposite and preparation method thereof

A nanocomposite material, carbon coating technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of huge application potential, high capacity, and excellent structural stability

Inactive Publication Date: 2016-04-20
WUHAN UNIV OF TECH
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a novel carbon-coated Na 0.55 mn 2 o 4 . 1.5H 2 O nanocomposite material and preparation method thereof

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-coated Na0.55 Mn2O4.1.5H2O nanocomposite and preparation method thereof
  • Carbon-coated Na0.55 Mn2O4.1.5H2O nanocomposite and preparation method thereof
  • Carbon-coated Na0.55 Mn2O4.1.5H2O nanocomposite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Weigh 0.1g of manganese dioxide (MnO2) prepared by hydrothermal method 2 ) nanorods, measure 400 μL of hydrochloric acid (HCl), add them into 50 mL of deionized water respectively, use an ultrasonic cleaner to sonicate for 30 minutes, then centrifuge and wash 3 times with deionized water and dry at 80°C; disperse the above powder in Add 1mL of ammonia solution and 0.4mL of tetraethyl orthosilicate to 100mL of ethanol solution (the ratio of alcohol to water is 4:1), respectively add 1mL of ammonia solution and 0.4mL of tetraethyl orthosilicate. Dried to obtain manganese dioxide nanorods coated with core-shell silica;

[0037] The preparation and pretreatment steps of manganese dioxide nanorods by hydrothermal method are as follows: Weigh 1.35g manganese sulfate monohydrate (MnSO 4 ·H 2 O) and 1.83g ammonium persulfate ((NH 4 ) 2 S 2 o 8 ) was dissolved in 70mL of water, stirred for 30 minutes, transferred to a 100mL polytetrafluoroethylene reactor, hydrothermall...

Embodiment 2

[0043] 1) Weigh 0.1g manganese dioxide (MnO 2 ) nanorods, measure 200 μL of sulfuric acid, add them into 50 mL of deionized water respectively, use an ultrasonic cleaner to sonicate for 20 minutes, then wash with deionized water for 3 times and dry at 60°C; disperse the above powder in 80 mL of ethylene di Add 1 mL of ammonia solution and 0.2 mL of tetraethyl orthosilicate to the alcohol solution (the ratio of alcohol to water is 2:1), respectively, and after magnetically stirring for 5 hours, wash with deionized water for 3 times and dry at 60°C , to obtain manganese dioxide nanorods coated with silica with a core-shell structure;

[0044] 2) Add 0.1 g of sucrose to 20 mL of ethylene glycol solution (alcohol-water ratio: 2:1), then weigh 40 mg of the powder sample prepared in step (1) and disperse in the solution, and use an ultrasonic cleaner to sonicate for 20 Minutes later, magnetically stirred for 22 hours, washed three times with deionized water and dried at 60 °C; the ...

Embodiment 3

[0047] 1) Weigh 0.087g manganese dioxide (MnO 2 ) nanorods, measure 500 μL of oxalic acid, add them into 50 mL of deionized water respectively, use an ultrasonic cleaner to sonicate for 10 minutes, then wash with deionized water for 3 times and dry at 70°C; disperse the above powder in 90 mL of isopropyl Add 1 mL of ammonia solution and 0.2 mL of tetraethyl orthosilicate to the alcohol solution (the ratio of alcohol to water is 1:1), respectively, after magnetically stirring for 4 hours, wash with deionized water for 3 times and dry at 70°C , to obtain manganese dioxide nanorods coated with silica with a core-shell structure;

[0048] 2) Add 0.3g of chitosan to 30mL of isopropanol solution (the ratio of alcohol to water is 1:1), then weigh 80mg of the powder sample prepared in step (1) and disperse it in the solution, and ultrasonically clean it with an ultrasonic cleaner After 10 minutes of treatment, magnetic stirring for 20 hours, centrifugation washing with deionized wate...

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 relates to a carbon-coated Na0.55 Mn2O4.1.5H2O nanocomposite and a preparation method thereof. Na0.55 Mn2O4.1.5H2O has a spherical structure formed by nanorods and is evenly wrapped by an amorphous carbon layer. The preparation method comprises the steps of (1) treating manganese dioxide nanorods by acid to modify the surfaces of the manganese dioxide nanorods, then adding tetraethyl orthosilicate (TEOS) into alcoholic solution of the manganese dioxide nanorods, and hydrolyzing to obtain silica-coated manganese dioxide core-shell structure composite material; (2) enabling the sample obtained in the step (1) to be coated with carbon to obtain carbonized composite material; (3) slowly adding the carbonized composite material powder sample into excess hot sodium hydroxide solution, and stirring for reaction. The carbon-coated Na0.55 Mn2O4.1.5H2O nanocomposite has high specific capacity as well as excellent rate performance and cycle performance, thus having wide application prospect in the technical fields of lithium ion battery electrode materials and other electrochemical techniques.

Description

technical field [0001] The invention belongs to the field of preparation of manganese-based oxygen-containing salt materials, in particular to a carbon-coated Na 0.55 mn 2 o 4 . 1.5H 2 O nanocomposites and methods for their preparation. Background technique [0002] Today, lithium-ion secondary batteries as a representative of new energy sources have been widely used in portable electronic devices such as mobile communications, notebook computers, and small cameras. Today, as electric vehicles are increasingly valued, lithium-ion batteries are one of the most important energy-supply materials; at the same time, they have also shown good application prospects and potential economic benefits in the fields of satellites, aerospace, and space military. These applications have made lithium-ion secondary batteries one of the hotspots in today's scientific and technological research. However, limited by the development of electrode materials, short cycle life, poor fast charg...

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): H01M4/36H01M4/505H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/505H01M4/625H01M10/0525Y02E60/10
Inventor 木士春张杰何婷张伟
Owner WUHAN UNIV OF TECH
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