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

Method for preparing monoclinic lithium vanadium phosphate

A technology of vanadium lithium monoclinic phosphate and phosphoric acid, which is applied to electrical components, battery electrodes, circuits, etc., can solve the problems of complex sol-gel process, large material particle size, and long calcination time, etc., and achieve large-scale production , small particle size, fast synthesis effect

Inactive Publication Date: 2013-12-04
MCNAIR TECH +2
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sintering temperature of the solid-state method is high, the calcination time is long, and the obtained material has a large particle size and uneven distribution, which is not conducive to the exertion of the electrochemical performance of the material.
The sol-gel method has low calcination temperature and short calcination time, and the prepared material particles are small and evenly distributed. However, the sol-gel method is complex in process, especially it takes a lot of heat and a long time to evaporate water.

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
  • Method for preparing monoclinic lithium vanadium phosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing lithium vanadium monoclinic phosphate, comprising the following steps:

[0022] a. Lithium hydroxide (LiOH·H 2 O), ammonium metavanadate (NH 4 VO 3 ), ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) and oxalic acid (H 2 C 2 o 4 2H 2 O) Dissolved in 350ml deionized water under mechanical stirring to form solution I, wherein calculated according to the amount of substance, n Li :n V :n PO4 3- =3.0:2:3, n V :n 草酸 =1:3;

[0023] b. Dissolve 1 g of citric acid in 50 mL of deionized water under ultrasonic dispersion to obtain solution II;

[0024] c. In a water bath at 70°C, under vigorous stirring, slowly add solution II to solution I dropwise to obtain solution III;

[0025] d. React the solution III obtained in step c in a water bath at 70°C for 3 hours to obtain solution IV;

[0026] e. Dissolve the acrylamide monomer and N,N'-methylenebisacrylamide crosslinking agent in solution IV under stirring, then raise the temperature of the w...

Embodiment 2

[0030] A method for preparing lithium vanadium monoclinic phosphate, comprising the following steps:

[0031] a. Lithium acetate (CH 3 COOLi·2H 2 O), ammonium metavanadate (NH 4 VO 3 ), phosphoric acid (H 3 PO 4 ) and oxalic acid (H 2 C 2 o 4 2H 2 O) Dissolved in 350ml deionized water under mechanical stirring to form solution I, wherein calculated according to the amount of substance, n Li :n V :n PO4 3- =3.05:2:3, n V :n 草酸 =1:3.5;

[0032] b. Dissolve 1 g of glycine in 70 mL of deionized water under ultrasonic dispersion conditions to obtain solution II;

[0033] c. In a water bath at 70°C, under vigorous stirring, slowly add solution II to solution I dropwise to obtain solution III;

[0034] d. React the solution III obtained in step c in a water bath at 70°C for 3 hours to obtain solution IV;

[0035] e. Dissolve the acrylamide monomer and N,N'-methylenebisacrylamide crosslinking agent in solution IV under stirring, then raise the temperature of the water...

Embodiment 3

[0039] A method for preparing lithium vanadium monoclinic phosphate, comprising the following steps:

[0040] a. Lithium acetate (CH 3 COOLi·2H 2 O), vanadium pentoxide (V 2 o 5 ), ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) and oxalic acid (H 2 C 2 o 4 2H 2 O) Dissolved in 400ml deionized water under mechanical stirring to form solution I, wherein calculated according to the amount of substance, n Li :n V :n PO4 3- =3.1:2:3,n V :n 草酸 =1:4;

[0041] b. Dissolve 1.5g of glycine in 70mL of deionized water under the condition of ultrasonic dispersion to obtain solution II;

[0042] c. In a water bath at 75°C, under vigorous stirring, slowly add solution II to solution I dropwise to obtain solution III;

[0043] d. React solution III obtained in step c in a water bath at 75°C for 2 hours to obtain solution IV;

[0044] e. Dissolve the acrylamide monomer and N,N'-methylenebisacrylamide crosslinking agent in solution IV under stirring, then raise the temperature...

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

No PUM Login to View More

Abstract

The invention relates to a preparation method of a lithium ion battery electrode material, particularly to a method for preparing monoclinic lithium vanadium phosphate. The method comprises the following steps: obtaining a stable solution comprising of metal ions of components through the strong complexing action of a complexing agent such as citric acid and glycine on metal ions in a water solution; allowing in situ polymerization of the gel of the solution through a three-dimensional gel network, and realizing by utilizing the space capturing effect of the organic polymer. Compared with the conventional sol-gel process, the polymer network gel method directly turns the solution into gel instead by the sol process, so that the obtained material has small particle size and good dispersibility, and the synthesis is rapid, simple and efficient and can realize large-scale production.

Description

technical field [0001] The invention relates to a preparation method of lithium ion battery electrode materials, in particular to a method for preparing lithium vanadium monoclinic phosphate. Background technique [0002] In view of the advantages of portability and long cycle life, lithium-ion batteries have been widely used as an energy storage device in electronic products such as mobile phones and notebook computers. In addition, the problem of environmental pollution caused by the use of fossil fuels has attracted more and more attention. Now governments and automakers around the world are working on the development of hybrid electric vehicles and electric vehicles, and lithium-ion batteries are a promising future. Power supply for electric vehicles. Safety is a crucial factor in power supplies for electric vehicles. Most commercial lithium-ion batteries now use layered lithium cobalt oxide (LiCoO 2 ) as the positive electrode material, but this material has poor 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
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58
CPCY02E60/12Y02E60/10
Inventor 王利娟李中延唐致远罗永莉张新河马莉刘东王浩
Owner MCNAIR 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