Unlock instant, AI-driven research and patent intelligence for your innovation.

Flower-like barium ion pillared V2O5.nH2O positive electrode material and preparation method and application thereof

A technology of v2o5·nh2o, cathode material, applied in the field of new secondary batteries, can solve problems such as poor structural stability, poor specific capacity and cycle performance, and achieve the effects of preventing structural collapse, improving ionic conductivity, and increasing contact area

Pending Publication Date: 2020-03-24
GUANGDONG UNIV OF TECH +1
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing V 2 o 5 ·nH 2 O cathode materials have relatively poor structural stability during cycling, which leads to the disadvantages of their poor specific capacity and cycle performance, providing a flower-like barium ion pillared V 2 o 5 ·nH 2 O cathode material and its preparation method and application

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
  • Flower-like barium ion pillared V2O5.nH2O positive electrode material and preparation method and application thereof
  • Flower-like barium ion pillared V2O5.nH2O positive electrode material and preparation method and application thereof
  • Flower-like barium ion pillared V2O5.nH2O positive electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Accurately weigh 0.182g (1mmol) vanadium pentoxide and add it to 60mL deionized water for stirring. During the stirring process, inject 3mL of hydrogen peroxide solution with a mass fraction of 30% into the above solution, and stir until vanadium pentoxide dissolves into clear solution;

[0039] (2) adding mole fraction to above-mentioned solution is the barium nitrate of 3% (the mol ratio of barium nitrate and vanadium pentoxide is 0.03:1), stirring and dissolving;

[0040] (3) Transfer the above mixed solution to a high temperature and high pressure reactor, control the reaction temperature to be 300°C, the pressure to be about 30MPa, and the reaction time to be 2h;

[0041] (4) After cooling to room temperature, the above-mentioned product was collected and fully washed with deionized water, and finally freeze-dried for 24 hours to obtain a three-dimensional flower-shaped Ba x V 2 o 5 ·nH 2 O cathode material (its XRD spectrum and morphology are respectively ...

Embodiment 2

[0045] (1) Accurately weigh 0.182g (1mmol) vanadium pentoxide and add it to 40mL deionized water for stirring. During the stirring process, inject 2mL of hydrogen peroxide solution with a mass fraction of 30% into the above solution, and stir until vanadium pentoxide dissolves into clear solution;

[0046] (2) adding mole fraction to above-mentioned solution is the barium chloride of 6% (the mol ratio of barium chloride and vanadium pentoxide is 0.06:1), stirring and dissolving;

[0047] (3) Transfer the above mixed solution into a high temperature and high pressure reactor, the reaction temperature is 450°C, the pressure is about 50MPa, and the reaction time is 0.5h;

[0048] (4) After being cooled to room temperature, the above-mentioned product was collected and fully washed with deionized water, and finally freeze-dried for 48 hours to obtain the flower-shaped Ba x V 2 o 5 ·nH 2 O cathode material.

Embodiment 3

[0050] (1) Accurately weigh 0.182g (1mmol) vanadium pentoxide and add it to 50mL deionized water for stirring. During the stirring process, inject 1mL of hydrogen peroxide solution with a mass fraction of 35% into the above solution, and stir until vanadium pentoxide dissolves into clear solution;

[0051] (2) adding mole fraction to above-mentioned solution is the barium nitrate of 20% (the mol ratio of barium nitrate and vanadium pentoxide is 0.2:1), stirring and dissolving;

[0052] (3) Transfer the above mixed solution into a high temperature and high pressure reactor, the reaction temperature is 400°C, the pressure is about 40MPa, and the reaction time is 0.5h;

[0053] (4) After cooling to room temperature, the above-mentioned product was collected and fully washed with deionized water, and finally freeze-dried for 24 hours to obtain the flower-shaped Ba x V 2 o 5 ·nH 2 O cathode material.

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
Discharge specific capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a flower-like barium ion pillared V2O5.nH2O positive electrode material and a preparation method and application thereof, and belongs to the technical field of micro-nano materials and electrochemistry. The preparation method of a flower-like barium ion pillared V2O5.nH2O positive electrode material comprises the following steps: dissolving vanadium pentoxide in a mixed solution consisting of a hydrogen peroxide solution and deionized water, adding a proper amount of barium salt into the mixed solution, uniformly stirring, transferring the solution into a high-temperature and high-pressure reaction kettle for reaction, and finally collecting, washing and drying to obtain the flower-like barium ion pillared V2O5.nH2O positive electrode material. According to the preparation method, a proper amount of barium ions are introduced between the V2O5.nH2O layers, so that the structural stability is greatly improved, and the obtained barium ion pillared V2O5.nH2O shows excellent rate capability and cycling stability when being used as a water-based zinc ion positive electrode material.

Description

technical field [0001] The invention belongs to the technical field of new secondary batteries, in particular to a barium ion pillared V 2 o 5 ·nH 2 O positive electrode material and its preparation method and its application in aqueous zinc-ion battery. Background technique [0002] At present, lithium-ion batteries using organic electrolytes as electrolytes occupy the power supply market for portable devices and electric / hybrid vehicles due to their advantages such as high energy density and cycle stability. However, unfavorable factors such as limited lithium resources and safety hazards caused by flammable and explosive organic electrolytes have severely restricted the further development of lithium-ion batteries in large-scale energy storage. Therefore, many teams have shifted their research focus to the development of low-cost, high-energy-density new secondary batteries (such as sodium, potassium, zinc, aluminum, magnesium ion secondary batteries, etc.). Among the...

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): H01M4/48H01M4/36H01M10/36
CPCH01M4/48H01M4/362H01M10/36Y02E60/10
Inventor 芮先宏陈浩亮邝欣怡朱瀚文李云飞黄少铭
Owner GUANGDONG UNIV OF TECH
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