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

A kind of amorphous manganese dioxide and its preparation method and application

A manganese dioxide and amorphous technology, applied in the field of materials, can solve the problems of increasing cost of lithium-ion batteries, restricting the application of lithium-ion batteries, and increasing lithium prices, etc., achieving good cycle stability, low requirements for reaction environment, and high specific capacity Effect

Active Publication Date: 2020-05-08
SHANGHAI UNIVERSITY OF ELECTRIC POWER
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the large-scale use of lithium batteries, the reserves of lithium resources on the earth are not ideally sufficient, which has caused the shortage of lithium resources and the subsequent increase in lithium prices, and the cost of lithium-ion batteries has greatly increased. Will restrict the application of lithium-ion batteries in the field of energy storage

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
  • A kind of amorphous manganese dioxide and its preparation method and application
  • A kind of amorphous manganese dioxide and its preparation method and application
  • A kind of amorphous manganese dioxide and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] At room temperature, add 1.58g KMnO 4 And 3.68g Mn(CH 3 COO) 2 ·4H 2 O was prepared into 50mL solution with deionized water, and KMnO 4 The solution is magnetically stirred, and then the Mn(CH 3 COO) 2 ·4H 2 O solution is added dropwise to KMnO 4 In the solution, stir for 5 minutes to form a homogeneous solution. Prepare 10mL of KOH solution with a concentration of 0.16g / L, add it to the above homogeneous solution, keep magnetic stirring at room temperature for 4h to obtain a dark brown precipitate, wash it several times with deionized water and absolute ethanol, and put the precipitate in an oven Dry at 85°C for 12 hours, grind uniformly with a mortar, and calcinate at 400°C for 3 hours in an air atmosphere to obtain sample manganese dioxide.

[0029] The synthesized MnO 2 The material and the conductive agent (graphite: carbon black = 4:6) are mixed and added to the ball milling tank at a mass ratio of 7:2, dry milled in a planetary ball mill for two hours, and then wet m...

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
diameteraaaaaaaaaa
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to amorphous MnO2 and preparation method and application thereof. The preparation method comprises the following steps of (1) mixing a KMnO4 solution and a Mn(CH<3>COO)<2>.4H<2>Oto prepare a uniform solution; (2) adding a KOH solution into the uniform solution obtained in the step (1), and performing stirring to obtain a deep brown precipitant; and (3) washing, drying, grinding and calcining the deep brown precipitant obtained in the step (2) to obtain an amorphous MnO2 material. The prepared amorphous MnO2 is used for a sodium ion battery positive electrode material. Compared with the prior art, the synthesis process is simple, the reaction condition is simple, the reaction environment requirement is low, and the preparation method is suitable of industrialization on a large scale; the amorphous MnO2 material is used as the sodium ion battery positive electrode material and has relatively large specific area, the sodium ion mobility is greatly improved, relatively high specific capacity and favorable cycle stability are shown.

Description

Technical field [0001] The invention relates to the field of materials, in particular to a preparation method and application of amorphous manganese dioxide. Background technique [0002] In today's world where there is a shortage of fossil fuels and environmental problems are becoming increasingly prominent, the development and use of new green energy sources are getting more and more attention. At present, the most widely studied new energy systems include solar energy, geothermal energy, wind energy and other energy systems, but these systems have intermittent problems, so they cannot be effectively used on a large scale. The key to solving this problem lies in the development of energy storage technology. Among the many current energy storage technologies, chemical energy storage has become the most widely used energy storage method because of its simplicity and high efficiency. In chemical energy storage, lithium-ion batteries have received the most attention. Lithium-ion...

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 Patents(China)
IPC IPC(8): H01G11/46H01G11/86H01G11/30
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 张俊喜陈曈曹永杰周义荣夏修萍任平
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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