A kind of zinc vanadate-molybdenum trioxide nanosheet lithium battery electrode material and preparation method

A molybdenum trioxide and electrode material technology, applied in battery electrodes, chemical instruments and methods, nanotechnology and other directions, can solve the problems of short life, large capacitance loss, volume expansion and pulverization, and achieve high efficiency and simple and easy method. to solve the effect of rapid capacity decay

Active Publication Date: 2018-06-01
李倩楠
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of volume expansion and pulverization, large capacity loss and short life when zinc vanadate is used in the negative electrode of lithium battery, the present invention proposes a zinc vanadate-molybdenum trioxide nanosheet lithium battery electrode material, which is characterized in that Sheet-like zinc vanadate is formed between the layers of molybdenum disulfide, and nanosheet electrode materials assembled from zinc vanadate and molybdenum trioxide are obtained by sintering and mechanical exfoliation.

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 zinc vanadate-molybdenum trioxide nanosheet lithium battery electrode material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Molybdenum disulfide is infiltrated with dilute sulfuric acid, then washed with water and dried, and expanded by high pressure to increase the interlayer distance of molybdenum disulfide and become loose molybdenum disulfide;

[0028] (2) Dissolve ammonium metavanadate and zinc acetate in a reactor with a molar ratio of 2:3 in hot water at 80-90°C, then add the prefabricated loose molybdenum disulfide in step (1), and turn on the negative vacuum pump , stirring under vacuum for 30 minutes, so that the solution of ammonium metavanadate and zinc acetate enters the interlayer of molybdenum disulfide;

[0029] (3) Raise the temperature of the reactor to 150-200°C, and control the reaction time at 45-60 minutes. The solution of ammonium metavanadate and zinc acetate uses the interlayer of molybdenum disulfide as a growth template, and forms zinc vanadate flakes along the layer space. , while maintaining a vacuum, so that the reaction by-products such as water are dischar...

Embodiment 2

[0034] (1) Soak the molybdenum disulfide with dilute sulfuric acid, then wash it with water and dry it, and expand the interlayer distance of the molybdenum disulfide to become loose molybdenum disulfide;

[0035] (2) Dissolve ammonium metavanadate and zinc acetate in hot water at 80-90°C in a reaction kettle at a molar ratio of 2:4, and then add the prefabricated loose molybdenum disulfide in step (1), loose molybdenum disulfide The dosage is 5% of the total mass of ammonium metavanadate and zinc acetate, turn on the negative vacuum pump, stir under vacuum conditions for 30min, so that the solution of ammonium metavanadate and zinc acetate enters the interlayer of molybdenum disulfide;

[0036](3) Raise the temperature of the reaction kettle to 200°C, and control the reaction time at 60 minutes. The solution of ammonium metavanadate and zinc acetate uses the interlayer of molybdenum disulfide as a growth template to form zinc vanadate flakes along the layer space while maintai...

Embodiment 3

[0041] (1) Soak the molybdenum disulfide with dilute sulfuric acid, then wash it with water and dry it, and expand the interlayer distance of the molybdenum disulfide to become loose molybdenum disulfide;

[0042] (2) Dissolve ammonium metavanadate and zinc acetate in hot water at 80-90°C in a reaction kettle at a molar ratio of 2:2, and then add the prefabricated loose molybdenum disulfide in step (1), loose molybdenum disulfide The dosage is 10% of the total mass of ammonium metavanadate and zinc acetate, turn on the negative vacuum pump, stir under vacuum conditions for 30min, make the solution of ammonium metavanadate and zinc acetate enter the interlayer of molybdenum disulfide;

[0043] (3) Raise the temperature of the reaction kettle to 200°C, and control the reaction time at 60 minutes. The solution of ammonium metavanadate and zinc acetate uses the interlayer of molybdenum disulfide as a growth template to form zinc vanadate flakes along the layer space while maintaini...

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 present invention relates to the field of lithium battery materials, particularly to a zinc vanadate-molybdenum trioxide nano-sheet lithium battery electrode material and a preparation method thereof. According to the present invention, zinc vanadate grows in the interlayer of molybdenum disulfide so as to simply and efficiently obtain the nano-scale and uniform-thickness zinc vanadate, and further the formed sheet-like zinc vanadate and molybdenum trioxide are sintered and assembled by using the high temperature conversion of molybdenum disulfide into molybdenum trioxide to obtain the nano-sheet electrode material; the sheet-like zinc vanadate and the molybdenum trioxide layer are embedded to form the structure to the sandwich, wherein the layer structure endows the zinc vanadate with the buffer space, such that the volume expansion during the lithium intercalation process can be effectively relieved, and the defect of the rapid attenuation of the capacity of the zinc vanadate adopted as the lithium battery negative electrode material is solved; and particularly the method is easy to control, the obtained zinc vanadate-molybdenum trioxide nano-sheet electrode material has the stable quality, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of lithium battery materials, in particular to a zinc vanadate-molybdenum trioxide nanosheet lithium battery electrode material and a preparation method. Background technique [0002] As the most suitable secondary battery for power batteries, lithium-ion batteries have developed rapidly in recent years. Lithium battery anode materials have been monopolized by graphite-based carbon materials. After more than 20 years of development, graphite anode materials have reached their limits. There is little room for improvement in terms of capacity, cycle rate performance, and safety performance. At present, graphite and modified graphite carbon materials are widely used as anode materials for commercial lithium-ion batteries. Due to their low specific capacity (372mAh / g), the main carbon-based anode materials obviously cannot meet the needs of high-power and high-capacity lithium-ion batteries for vehicles. Therefore, it is...

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): H01M4/36H01M4/485H01M4/62H01M10/0525C01G31/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G31/00C01P2004/20C01P2006/40H01M4/366H01M4/485H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 陈庆曾军堂
Owner 李倩楠
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