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

Na2Fe2P2O7 material with flower-like structure and preparation method and application thereof

A sodium iron pyrophosphate, flower-like structure technology, applied in the direction of structural parts, electrical components, electrochemical generators, etc., can solve the problem of difficult to effectively reduce the manufacturing cost of sodium-ion batteries, high rate performance, poor cycle life and electrical conductivity, Problems such as poor electronic conductivity, to achieve the effect of excellent high rate performance, excellent electrochemical performance, and large contact area

Active Publication Date: 2017-02-22
CENT SOUTH UNIV
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most of the preparation methods, the solid phase ball milling method can be used to achieve large-scale industrial production, but the prepared materials have poor morphology and low phase purity, resulting in poor high-rate performance, cycle life and conductivity. poor
and Na 2 FeP 2 o 7 The electronic conductivity of the material is poor, and it generally needs to be combined with a substrate with good conductivity, such as graphene, carbon fiber and other carbon materials, to improve the conductivity of the material, thereby improving the high-rate performance of the material to meet the requirements of large-scale energy storage and high-current charging and discharging. need
However, carbon substrates such as graphene and carbon fiber are relatively expensive, and it is difficult to effectively reduce the manufacturing cost of sodium-ion batteries, and cannot meet the requirements of low cost in the field of large-scale 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
  • Na2Fe2P2O7 material with flower-like structure and preparation method and application thereof
  • Na2Fe2P2O7 material with flower-like structure and preparation method and application thereof
  • Na2Fe2P2O7 material with flower-like structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) The design of this embodiment generates 0.03mol target product Na 2 FeP 2 o 7 , 0.06mol of ferrous chloride and 2g of ascorbic acid were dissolved in 80mL of deionized water, after stirring evenly, slowly adding 0.02mol of ammonium dihydrogen phosphate, supplemented by vigorous stirring, to obtain a mixed solution;

[0044] (2) Dissolve 0.036mol of sodium acetate in 10mL of deionized water, drop into the mixed solution obtained in step (1) at a constant speed, supplemented by vigorous stirring, and then add 20g of triethanolamine, after the solution is transformed from off-white to dark green, the The solution was transferred to a hydrothermal reaction kettle, reacted at 200°C for 20h, and then the product was transferred to a water bath at 80°C to evaporate the solution to dryness, and the obtained solid was vacuum-dried in a vacuum oven for 24h;

[0045] (3) Grind the precursor obtained in step (2) evenly, and then sinter at 300°C under the protection of a hydro...

Embodiment 2

[0051] This embodiment includes the following steps:

[0052] (1) The design of this embodiment generates 0.03mol target product Na 2 FeP 2 o 7 , 0.03mol of ferrous chloride and 2g of ascorbic acid were dissolved in 80mL of deionized water, after stirring evenly, slowly adding 0.06mol of ammonium dihydrogen phosphate, supplemented by vigorous stirring, to obtain a mixed solution;

[0053] (2) Dissolve 0.03mol of sodium acetate in 10mL of deionized water, and drop into the mixed solution obtained in step (1) at a constant speed, while supplementing with vigorous stirring, then add 20g of triethanolamine, after the solution is transformed from off-white to dark green, the The solution was transferred to a hydrothermal reaction kettle, reacted at 200°C for 20h, and then the product was transferred to a water bath at 80°C to evaporate the solution to dryness, and the obtained solid was vacuum-dried in a vacuum oven for 24h;

[0054] (3) Grind the precursor obtained in step (2) ...

Embodiment 3

[0057] This embodiment includes the following steps:

[0058] (1) The design of this embodiment generates 0.03mol target product Na 2 FeP 2 o 7 , 0.03mol of ferrous chloride and 2g of ascorbic acid were dissolved in 80mL of deionized water, after stirring evenly, slowly adding 0.06mol of ammonium dihydrogen phosphate, supplemented by vigorous stirring, to obtain a mixed solution;

[0059] (2) Dissolve 0.03mol of sodium acetate in 10mL of deionized water, and drop into the mixed solution obtained in step (1) at a uniform speed, while supplementing with vigorous stirring, then add 15g of triethanolamine, after the solution is transformed from off-white to dark green, the The solution was transferred to a hydrothermal reaction kettle, reacted at 200°C for 20h, and then the product was transferred to a water bath at 80°C to evaporate the solution to dryness, and the obtained solid was vacuum-dried in a vacuum oven for 24h;

[0060](3) Grind the precursor obtained in step (2) ev...

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
concentrationaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses an Na2Fe2P2O7 material with a flower-like structure and a preparation method and application of the Na2Fe2P2O7 material with the flower-like structure. The material is formed by assembling Na2Fe2P2O7 with the flower-like structure, and the preparation method of the Na2Fe2P2O7 material comprises the following steps that a precursor is synthesized by using a hydrothermal method, and then calcined to obtain the Na2Fe2P2O7 material with the flower-like structure; the Na2Fe2P2O7 material with the flower-like structure can expose high-activity crystal faces, and has higher electrochemical activity, thereby having high specific capacity and working voltage while being used as a sodium ion anode material, and still having excellent rate capability and good cycle stability without using a carbon substrate.

Description

technical field [0001] The present invention relates to a kind of sodium ferric pyrophosphate (Na 2 Fe 2 P 2 o 7 ) material, specifically a flower-like structured Na 2 Fe 2 P 2 o 7 Materials and their preparation methods, and Na 2 Fe 2 P 2 o 7 The invention relates to the application of the material as a positive electrode material of a sodium ion battery; it belongs to the field of the sodium ion battery. Background technique [0002] Since the commercial production of lithium-ion batteries, lithium-ion batteries have been widely used in various fields, and have an absolute advantage in the field of mobile energy storage. However, due to the shortage of lithium metal resources in the world, large-scale energy storage fields such as electric vehicles and energy storage power stations require a large amount of raw materials, and the manufacturing cost of lithium-ion batteries is on the rise. In the field of energy storage, there is an urgent need for secondary bat...

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): H01M4/58H01M10/054
CPCH01M4/5825H01M10/054Y02E60/10
Inventor 张治安陈晓彬李军明赖延清李劼
Owner CENT SOUTH UNIV
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