Lithium manganese iron phosphate and preparation method and application therefor

A technology of lithium iron manganese phosphate and lithium iron phosphate sol, applied in chemical instruments and methods, phosphorus compounds, structural parts, etc., can solve the problems of poor electronic conductivity and ionic conductivity of lithium iron manganese phosphate, and improve electrochemical performance. , The effect of high specific capacity and high stability

Active Publication Date: 2016-01-06
BYD CO LTD
View PDF4 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the shortcomings of poor electronic conductivity and ion conductivity of lithium manganese iron phosphate prepared in the prior art, the present invention provides a lithium manganese iron phosphate with high electronic conductivity and ion conductivity 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
  • Lithium manganese iron phosphate and preparation method and application therefor
  • Lithium manganese iron phosphate and preparation method and application therefor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The present invention provides a preparation method for lithium manganese phosphate iron phosphate iron phosphates and lithium -phosphate solidaries and lithium manganese phosphate solidaries with solid gels.Burning manganese iron phosphate iron.

[0016] In the present invention, the solution gel method can be used to uniformly cover the surface of the positive material; the soluble gel method is all obtained by the particles of about 50-100 nanometerHelp; because both front -wheel drives are solitary, they are also mixed with molecular levels during the mixing process, which can achieve the purpose of uniform mixing.It is convenient to blend into a variety of different proportions of manganese -lithium -lithium orthopedic materials, which provides great convenience for industrial production.

[0017] According to the preparation method of lithium manganese phosphate iron phosphate provided by the present invention, the method includes the following steps:

[0018] S1. Use...

Embodiment 1

[0049] Called 0.18mol manganese nitrate, 0.18 mol of lithium hydroxide, 0.18 mol hydrogen ammonium dihydium, and 0.18 mol citric acid, add derived ion water to 3mol / L, 6mol / L, 6mol / L, 6mol / 6mol / L's solution, then mix mangible manganese solution with citric acid solution to form the first suspension. The hydrogen phosphate dilate is added to form the first suspension to form a second suspension; finally the lithium hydroxide solution is added toThe third floating fluid is formed in the above second suspension. Under the stirring conditions, the pH value of the drooping water is adjusted by 3.5, and the transparent lithium soluble gel is obtained after stirring for 10 minutes.

[0050] Called 0.02mol nitrate, lithium hydroxide of 0.02 mol, 0.02 mol hydrogen ammonium dilate, and 0.02 mol citric acid, add derived ion water to 0.67mol / L, 0.67mol / L, 0.67mol / L / L, respectively, 0.67mol / L solution, then add hydrogen phosphate dilate to the nitrate solution to form the fourth suspension thr...

Embodiment 2

[0052] Called 0.18mol manganese acetate, lithium hydroxide of 0.18 mol, 0.18 mol phosphate dihydrogen, and 0.36 mol's asktohic acid.The solution of the manganese nitrate to form the first suspension with manganese solution and citric acid solution, and add hydrogen -phosphate dilate to the first suspension to form a second suspension; finally add lithium hydroxide solution to the above second second second second.The third suspension is formed in the suspension. Under the stirring conditions, the pH value of the donetrole water is adjusted at 5, and the transparent iron phosphate solidaries are obtained after mixing for 40 minutes.

[0053] Called 0.045 mol of iron chloride, lithium hydroxide of 0.045 mol, 0.045 mol hydrogen phosphate, and 0.045 mol's asktohic acid., 0.1mol / L solution, then add hydrogen -phosphate dilate to the nitrate solution to form the first suspension through the dripping method, and then add the first suspension to the citric acid solution to form a second s...

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
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides lithium manganese iron phosphate and a preparation method and an application therefor. The preparation method for the lithium manganese iron phosphate comprises the steps of preparing a lithium iron phosphate solution and a lithium manganese phosphate solution through a sol-gel method separately; and then calcining the lithium iron phosphate solution and the lithium manganese phosphate solution at an inert atmosphere to obtain the lithium manganese iron phosphate. The primary particle of the lithium manganese iron phosphate prepared by the preparation method of the invention is about 100-nanometer; and the lithium manganese iron phosphate is 140-160 mAh / g in specific capacity, higher in the rate capacity, and can be used as positive electrode materials of power batteries.

Description

Technical field [0001] The invention is a lithium -ion battery field, especially for a lithium manganese phosphate iron phosphate iron and its preparation methods and applications. Background technique [0002] Lithium -ion batteries, as high -scale energy chemical power sources, have been widely used in mobile communications, laptop computers, cameras, cameras, portable instruments and other fields. It is also the preferred supporting power supply for electric vehicles and space power supplies that countries have strongly studied.Essence [0003] Lithium -ion battery positive materials are hot spots and difficulties of existing technology research. Commonly used like LIFEPO 4 , Have good electrochemical performance, the charging and discharge platform is very stable, the structure is stable during the charging and discharge process, and it has the advantages of non -toxic, pollution -free, good safety performance, can be used in high temperature environments, and has a wide rang...

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): H01M4/58C01B25/45
CPCY02E60/10
Inventor 江正福焦晓朋
Owner BYD CO LTD
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