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

Li2Na4V10O28 and preparation method and use thereof

A technology of dilithium and tetrasodium decabonate vanadate and dilithium and tetrasodium decabonate vanadate is applied in the field of new compound dilithium and tetrasodium decabonate vanadate and its preparation, and can solve the problems of low safety in use, low electronic conductivity, Price increase and other issues, to achieve the effect of stable charging and discharging efficiency, small battery interface resistance, and low equipment temperature resistance requirements

Inactive Publication Date: 2009-06-17
ZHEJIANG UNIV OF TECH +1
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current commercial lithium-ion battery active material, lithium cobaltate, is far from meeting the needs of high-power applications; in addition, the resource and pollution problems of lithium cobaltate limit the scope of use of lithium cobaltate batteries, especially at present. The price of lithium in the domestic and foreign markets has risen rapidly, increasing by nearly one-third
LiCoO 2 It has certain toxicity, and cobalt is a rare metal, and the market price is expensive. At present, about half of the cobalt in my country must be imported; LiMn 2 o 4 It has the disadvantages of low capacity, and the capacity is easy to decay at higher temperatures, and the reversibility is not good; LiNiO 2 The preparation conditions are harsh and it is not easy to produce on a large scale, so it is necessary to develop alternative products; LiFePO 4 The biggest obstacle to application is the extremely low electronic conductivity, making the material less safe to use

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
  • Li2Na4V10O28 and preparation method and use thereof
  • Li2Na4V10O28 and preparation method and use thereof
  • Li2Na4V10O28 and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Ammonium metavanadate, sodium hydroxide and lithium hydroxide are respectively dissolved in the water solvent according to the molar ratio of 1:0.2:0.4, the consumption of ammonium metavanadate is 6.0g, and the total consumption of water solvent is the quality of ammonium metavanadate 30 times. After mixing, adjust the pH to about 4 with dilute nitric acid, move it to a high-pressure stainless steel reaction kettle, heat it at a temperature of about 120°C for 12 hours, filter the solution and let it stand for about 15 days, and produce about 6.60g of orange crystals as the precursor Single crystal [LiNa 2 (H 2 O) 9 ] 2 V 10 o 28 , its molecular space structure is determined, and the structure diagram is as follows figure 1 .

Embodiment 2

[0037] Ammonium metavanadate, sodium hydroxide and lithium hydroxide are respectively dissolved in the water solvent according to the molar ratio of 1:0.3:0.5, the consumption of ammonium metavanadate is 3.0g, and the total consumption of water solvent is the ammonium metavanadate quality 56 times. After mixing, adjust the pH to about 4 with dilute nitric acid, move it to a high-pressure stainless steel reaction kettle, and heat it at a temperature of about 150°C for 10 hours. The solution is filtered and left for about 10 days, and about 2.80g of orange crystals are formed, which is the precursor. Single crystal [LiNa 2 (H 2 O) 9 ] 2 V 10 o 28 , its molecular space structure is determined, and the structure diagram is as follows figure 1 .

Embodiment 3

[0038] Example 3 Pulverization of precursor crystals

[0039] Weigh about 8 grams of precursor crystals, after 2 hours of ball milling, the XRD spectrum is as follows figure 2 shown.

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 capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses dilithium tetrasodium vanadate and a preparation method and application thereof. The chemical formula of the dilithium tetrasodium vanadate is Li2Na4V10O28. The preparation method for the compound comprises: firstly, dissolving ammonium metavanadate, lithium hydroxide and sodium hydroxide into a water solvent respectively according to the mass ratio of fed substances of 1:0.2-0.4:0.4-0.8, using nitric acid to adjust the pH value of the solution to be approximately between 3 and 5 after mixing, transferring the solution after full mixing into a reaction kettle, sealing the reaction kettle, heating the solution to be between 110 and 200 DEG C and maintaining at the temperature for 8 to 13 hours, and making the solution undergo filtration and standing to obtain precursor crystals; secondly, mechanically grinding and uniformly crushing the precursor crystals, calcining the precursor crystals for 6 to 9 hours at a temperature of between 200 and 270 DEG C under the atmosphere of inert gas, and obtaining the dilithium tetrasodium vanadate. The dilithium tetrasodium vanadate has novel compositions and a novel structure, and is a brand-new lithium ion battery anode active material.

Description

1. Technical field [0001] The present invention relates to a kind of novel compound tetrasodium dilithium vanadate (Li 2 Na 4 V 10 o 28 ) and its preparation method and application, especially as the application of lithium-ion battery cathode active material. 2. Background technology [0002] Since the commercial production of lithium-ion batteries in 1990, due to the advantages of high energy density, light weight, small size, long cycle life, and no memory effect, they have been widely used in mobile communications, digital cameras, laptop computers and other electronic products as well as electric bicycles, electric vehicles widely used in automobiles. [0003] Since the commercial production of lithium-ion batteries in 1990, due to the advantages of high energy density, light weight, small size, long cycle life, and no memory effect, they have been used in mobile communications, digital cameras, laptop computers and other electronic products, as well as electric bicy...

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): C01G31/00H01M4/58
Inventor 马淳安谢爱理王连邦
Owner ZHEJIANG UNIV OF TECH
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