Vanadium pentoxide cathode material, preparation method and application thereof

A technology of vanadium pentoxide and cathode material, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve the problems of low lithium ion diffusion coefficient, poor cycle stability, unstable structure, etc. The effect of distance, maintaining stability, reducing transit time

Inactive Publication Date: 2019-05-31
ZHUHAI COSMX BATTERY CO LTD
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve V 2 o 5 Lithium ion diffusion coefficient is small, the structure is unstable, the cycle stability is poor, and the electrical conductivity is poor. The invention provides a vanadium pentoxide positive electrode material and a preparation method, which utilizes the growth of three-dimensional nano VS of flower structure 2 , and then annealed in an oxygen-containing atmosphere to generate V with an inert conductive substrate 2 o 5 nanoflower

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
  • Vanadium pentoxide cathode material, preparation method and application thereof
  • Vanadium pentoxide cathode material, preparation method and application thereof
  • Vanadium pentoxide cathode material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0025] A vanadium pentoxide positive electrode material, the vanadium pentoxide positive electrode material is a three-dimensional nanoflower structure, the sheet thickness of the nanoflower is 10-100 nm, and a plurality of holes are distributed on the three-dimensional nanoflower, each The diameter of each hole is 1-50 μm.

[0026] Further, the vanadium content in the positive electrode material of vanadium pentoxide is 10-50wt%, preferably 20-30wt%, the carbon content is 10-50wt%, preferably 20-40wt%, and the rest is oxygen.

[0027] A preparation method of vanadium pentoxide cathode material, comprising the following steps:

[0028] Step 1, hydrothermally growing vanadium disulfide with a three-dimensional nanoflower structure on an inert conductive substrate;

[0029] Step 2: putting the conductive substrate of vanadium disulfide with three-dimensional nanoflower structure into an oxygen-containing atmosphere and annealing to obtain a positive electrode material of vanadi...

Embodiment 1

[0045] (1) Set the size to 2 cm 2 , the graphene paper with a thickness of 20 μm was placed in the precursor mixed aqueous solution A with a mass ratio of 1:1 thioacetamide and ammonium metavanadate, and hydrothermally reacted at 120°C for 12 h to obtain a three-dimensional nanoflower structure vanadium disulfide VS 2 , wherein the concentration of the mixed solution A is 30 g / L;

[0046] (2) VS loaded with three-dimensional nanoflower structure 2 The graphene paper was annealed in an oxygen environment, the annealing temperature was 200°C, and the annealing time was 1 h to obtain a three-dimensional nanoflower structure vanadium pentoxide positive electrode material;

[0047] (3) Grind the vanadium pentoxide positive electrode material with a three-dimensional nanoflower structure into a powder particle with a particle size of 5-50 μm, mix it with NMP and Super P to obtain a mixed solution B, and add the mixed solution B dropwise to the 100 μm thick Garnet solid electrolyte...

Embodiment 2

[0050] (1) Set the size to 2 cm 2 , the graphene paper with a thickness of 50 μm was placed in the precursor mixed aqueous solution A with a mass ratio of 1:3 thioacetamide and ammonium metavanadate, and hydrothermally reacted at 180°C for 24 h to obtain a three-dimensional nanoflower structure vanadium disulfide VS 2 , wherein the concentration of mixed aqueous solution A is 50 g / L;

[0051] (2) VS loaded with three-dimensional nanoflower structure 2 The graphene paper was annealed in the air environment, the annealing temperature was 400 ° C, and the annealing time was 2 h to obtain a three-dimensional nanoflower structure vanadium pentoxide positive electrode material;

[0052] (3) Grind the vanadium pentoxide positive electrode material with a three-dimensional nanoflower structure into a powder particle with a particle size of 5-50 μm, mix it with NMP and Super P to obtain a mixed solution B, and add the mixed solution B dropwise to the 50 μm thick Garnet solid electrol...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides a vanadium pentoxide cathode material, a preparation method and application thereof, and belongs to the technical field of lithium batteries. The vanadium pentoxide cathode material is a three-dimensional nanoflower structure. The nanoflower has a layer thickness of 10 to 100 nm. A plurality of pores are distributed on the three-dimensional nanoflower and have pore sizes of1 to 50[mu]m. The preparation method of the vanadium pentoxide cathode material comprises a step 1 of hydrothermally growing vanadium disulfide of a three-dimensional nanoflower structure on an inertconductive substrate; a step 2 of annealing the conductive substrate where the vanadium disulfide of the three-dimensional nanoflower structure is grown in an oxygen-containing atmosphere to obtain the vanadium pentoxide cathode material having the three-dimensional nanoflower structure. The vanadium pentoxide cathode material prepared by the method compensates for the disadvantages of structuralinstability and collapse proneness during the cyclic process of the vanadium pentoxide uses as a cathode material, increases the electrical conductivity and the specific surface area of the material,and facilitates the insertion and extraction of lithium ions.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a vanadium pentoxide cathode material and a preparation method and application thereof. Background technique [0002] Lithium batteries play an increasingly important role in people's production and life, and have been widely used. Lithium batteries have gradually replaced traditional batteries such as lead-acid and nickel metal hydride due to their advantages such as high energy density and no memory effect. It is foreseeable in the future that lithium batteries will completely replace traditional batteries. [0003] At the same time, the development of lithium batteries has slowed down in recent years, and the improvement of energy density has become a bottleneck for the development of lithium batteries. At present, most of the cathode materials used in 3C batteries are LiCoO 2 , the power materials are mostly LiFePO 4 and ternary materials, however, Li...

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): H01M4/36H01M4/48H01M4/62H01M10/0525B82Y40/00
CPCY02E60/10
Inventor 袁号李素丽赵伟唐伟超李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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