Potassium ion embedded type vanadium pentoxide nanowire and preparation method thereof and application thereof

A vanadium pentoxide nanometer and vanadium pentoxide technology, which is applied in the field of potassium ion pre-embedded vanadium pentoxide nanowires and its preparation, can solve the problems of limiting practical applications, capacity fading, cycle performance degradation, etc. The effects of market promotion, high specific capacity, and super good rate performance

Active Publication Date: 2013-07-17
安徽国芯新材料股份有限公司
View PDF15 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the charge and discharge process of vanadium pentoxide, with Li + The increase in the amount of ion intercalation, V 2 o 5 The wrinkled layer structure, the disordered crystal structure and the occurrence of irreversible phase transition will cause the degradation of its cycle performance and the rapid decay of capacity, which greatly limits its practical application in lithium-ion batteries.
In recent years, most of the modification work on vanadium pentoxide is to improve its performance by compounding with other high-conductivity materials and constructing special structures such as porous structures. The work of pre-embedding potassium ions between layers has not been reported yet.

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
  • Potassium ion embedded type vanadium pentoxide nanowire and preparation method thereof and application thereof
  • Potassium ion embedded type vanadium pentoxide nanowire and preparation method thereof and application thereof
  • Potassium ion embedded type vanadium pentoxide nanowire and preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of potassium ion pre-embedded type vanadium pentoxide nanowire, it comprises the steps:

[0036] 1) Weigh 0.7g SDS (sodium dodecyl sulfate) into 30ml deionized water, stir with a magnetic stirrer for 20 minutes, add 0.1818g V after the SDS is dissolved 2 o 5 Stir for another 20 minutes, then add 2ml of 1mol / L aqueous KOH solution therein, and continue stirring for 2 hours to obtain an orange-yellow aqueous solution;

[0037] 2) Transfer the aqueous solution obtained in step 1) to a 50ml reaction kettle, heat it in water at 180°C for 48 hours, and get a dark green product after taking it out;

[0038] 3) The product obtained in step 2) was centrifuged, washed 5 times with a mixed solution of absolute ethanol and deionized water (volume ratio 1:1), and dried in an oven at 80°C for 12 to 24 hours;

[0039] 4) The dried product obtained in step 3) was heat-treated in a muffle furnace at 600°C for 4 hours at a heating rate of 3°C / min, and a yellow-gr...

Embodiment 2

[0046] The preparation method of potassium ion pre-embedded type vanadium pentoxide nanowire, it comprises the steps:

[0047] 1) Weigh 0.7g SDS (sodium dodecyl sulfate) into 30ml deionized water, stir with a magnetic stirrer for 20 minutes, add 0.1818g V after the SDS is dissolved 2 o 5 Stir for another 20 minutes, then add 2ml of 1mol / L aqueous KOH solution therein, and continue stirring for 2 hours to obtain an orange-yellow aqueous solution;

[0048] 2) Transfer the aqueous solution obtained in step 1) to a 50ml reaction kettle, heat it in water at 180°C for 72 hours, and get a dark green product after taking it out;

[0049] 3) The product obtained in step 2) was centrifuged, washed 5 times with a mixed solution of absolute ethanol and deionized water (volume ratio 1:1), and dried in an oven at 80°C for 12 to 24 hours;

[0050] 4) The dried product obtained in step 3) was heat-treated in a muffle furnace at 500°C for 5 hours at a heating rate of 3°C / min, and a yellow-gr...

Embodiment 3

[0054] The preparation method of potassium ion pre-embedded type vanadium pentoxide nanowire, it comprises the steps:

[0055] 1) Weigh 0.1818g V 2 o 5 Add it to 30ml of deionized water, stir with a magnetic stirrer for 20 minutes, then add 0.5ml of 1mol / L KOH aqueous solution to it, and continue stirring for 24 hours to obtain an orange-yellow aqueous solution;

[0056] 2) Transfer the aqueous solution obtained in step 1) to a 50ml reaction kettle, heat it in water at 180°C for 120 hours, and get a dark green product after taking it out;

[0057] 3) The product obtained in step 2) was centrifuged, washed 5 times with a mixed solution of absolute ethanol and deionized water (volume ratio 1:1), and dried in an oven at 80°C for 12 to 24 hours;

[0058] 4) The dried product obtained in step 3) was heat-treated in a muffle furnace at 400°C for 8 hours at a heating rate of 3°C / min, and a yellow-green sample was obtained after heat treatment;

[0059] 5) Wash the sample obtained ...

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
lengthaaaaaaaaaa
volumeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a potassium ion embedded type vanadium pentoxide nanowire and a preparation method thereof. The preparation method includes 1), weighing V205 to add into deionized water, adding a KOH (potassium hydroxide) water solution and stirring to obtain a water solution; 2), transferring the water solution into a reaction still, heating the water solution, and obtaining deep green products after the water solution is taken out; 3), performing centrifugal separation, washing the deep green products by a mixed solution mixing with absolute ethyl alcohol and deionized water, and then placing the deep green products in a dryer to dry; 4), putting the deep green products in a muffle furnace to have a heat treatment to obtain yellow green samples; and 5), washing the yellow green samples in step 4 with the mixed solution mixing with the absolute ethyl alcohol and the deionized water, putting the yellow green samples in the dryer to dry to obtain the potassium ion embedded type vanadium pentoxide nanowire. The potassium ion embedded type vanadium pentoxide nanowire has the advantages that the nanowire has high specific capacity, good cycling stability and excellent rate capability, and is a potential high-performance commercial lithium ion battery anode material.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrochemistry, and in particular relates to a potassium ion pre-embedded vanadium pentoxide nanowire and a preparation method thereof. The nanowire can be used as a positive active material of a lithium ion battery. Background technique [0002] With the ever-increasing demand for energy, exploring new clean energy materials with excellent performance has become a challenge today. Vanadium pentoxide, which has a typical layered structure, is suitable for intercalation and extraction of lithium ions. As a positive electrode material for lithium ion batteries, it has the advantages of high theoretical capacity, low price, and simple synthesis method, and has received more and more attention. people's attention. [0003] However, during the charge and discharge process of vanadium pentoxide, with Li + The increase in the amount of ion intercalation, V 2 o 5 The wrinkled layer s...

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): H01M4/48B82Y30/00
CPCY02E60/10
Inventor 麦立强赵云龙徐小明
Owner 安徽国芯新材料股份有限公司
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