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

A lithium battery positive electrode material and preparation method thereof, and all-solid lithium battery

A technology of positive electrode material and positive electrode active material, which is applied in the field of lithium battery materials, can solve the problem of high temperature reaction between solid electrolyte and positive electrode active material, and achieves the effect of simple and easy preparation method, ensuring stability and avoiding high temperature reaction.

Active Publication Date: 2021-12-07
BYD CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of high-temperature reaction between the solid-state electrolyte and the positive electrode active material in the preparation of the all-solid-state battery, the present invention provides a lithium battery positive electrode material and a preparation method thereof, and an all-solid lithium battery. Does not react with solid electrolytes

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
  • A lithium battery positive electrode material and preparation method thereof, and all-solid lithium battery
  • A lithium battery positive electrode material and preparation method thereof, and all-solid lithium battery
  • A lithium battery positive electrode material and preparation method thereof, and all-solid lithium battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] In a second aspect, the present invention provides a method for preparing the above-mentioned positive electrode material for a lithium battery, comprising the following steps:

[0043] 1) Preparation of sol: Al(NO 3 ) 3 Aqueous solution, adding one or more of basic compounds such as ammonia water, sodium hydroxide, potassium hydroxide and other basic compounds to adjust the pH to 7.5-10.8 to obtain hydrated alumina sol;

[0044] 2) Preparation of positive electrode material precursor: The molar ratio of lithium source, positive electrode active material and sol obtained in step (1) is 1-x: 5+y / 3 (0≤x≤0.1, 0≤y≤x ) to mix, heat to 60-80°C, and add positive electrode active material after it is uniformly dispersed, wherein, the molar ratio of lithium source to positive electrode active material is (0.0003-0.1):1, and stir at 60-80°C for 1 -24h, and dry at 80-150°C for use to obtain the precursor of the positive electrode material;

[0045] 3) Preparation of positive el...

Embodiment 1

[0064] The active material is LiCoO 2 , coated in LiCoO 2 The material on the particle surface is LiAlO 2 and LiAl 5 o 8 , where LiCoO 2 with LiAlO 2 and LiAl 5 o 8 The mass ratio is 100:8:3;

[0065] The specific synthesis method is:

[0066] 1) Preparation of sol: use 100mL H 2 O dissolves 32.51g Al(NO 3 ) 3 , Place the solution in a three-necked flask, slowly add ammonia water drop by drop while stirring, the end point of the addition is pH=8. After the dropwise addition, the solution gradually became a milky white suspension, and the colloid obtained after the suspension was filtered and washed was hydrated alumina sol (30wt% Al 3+ );

[0067] 2) Preparation of cathode material precursor: take 10g LiCoO 2 , 1.590 g of the hydrated alumina sol prepared above, 0.317 g of lithium hydroxide and 50 mL of ethanol were put into a three-necked flask, placed in a water bath at 80°C for condensing and reflux for 5 hours, filtered and washed the precipitate, and dried f...

Embodiment 2

[0072] The active material is LiNi 0.8 co 0.1 mn 0.1 o 2 , coated in LiNi 0.8 co 0.1 mn 0.1 o 2 The material on the particle surface is LiAlO 2 and Li 0.517 al 5.161 o 8 , where LiCoO 2 with LiAlO 2 and Li 0.517 al 5.161 o 8 The mass ratio is 100:8:3;

[0073] The specific synthesis method is:

[0074] 1) Sol preparation: use 100mL H 2 O dissolves 32.51g Al(NO 3 ) 3 , Place the solution in a three-necked flask, slowly add ammonia water drop by drop while stirring, the end point of the addition is pH=8. After the dropwise addition, the solution gradually became a milky white suspension. The colloid obtained after suction filtration and washing of the suspension is the hydrated alumina sol (30wt% Al 3+ );

[0075] 2) Preparation of cathode material precursor: take 10g LiNi 0.8 co 0.1 mn 0.1 o 2 1.605 g of the hydrated alumina sol prepared above, 0.304 g of lithium hydroxide and 50 mL of ethanol were put into a three-necked flask, and placed in a water b...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a lithium battery positive electrode material, comprising a positive electrode active material and a coating layer coated on the surface of the positive electrode active material, and the coating layer contains Li 1‑x Al 5+y / 3 o 8‑x+y (0≤x≤1, 0≤y≤x), the mass proportion of the coating layer in the positive electrode material is 0.1%-50%. The positive electrode material provided by the present invention does not react with the solid electrolyte LATP at high temperature, so that the capacity of the positive electrode active material can be normally exerted, so that the prepared all-solid-state battery has good battery performance.

Description

technical field [0001] The invention relates to the technical field of lithium battery materials, in particular to a lithium battery cathode material, a preparation method thereof, and an all-solid lithium battery. Background technique [0002] Traditional lithium-ion batteries use organic liquids as electrolytes for the transmission of lithium ions, but problems such as liquid leakage and flatulence are prone to occur, and in severe cases, the batteries may even burn and explode, making the batteries a potential safety hazard. All-solid-state lithium batteries use all-solid-state electrolytes to replace the diaphragm and electrolyte in traditional batteries for the transmission of lithium ions, which is safer than organic electrolytes. At the same time, after using an all-solid electrolyte, metal lithium can be used as the negative electrode, which can also increase the energy density of the battery. [0003] Solid electrolytes can be divided into two types, one is organic...

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): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/0562
CPCH01M4/366H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/0562Y02E60/10
Inventor 李世彩韩晓燕焦晓朋甘永青宋威
Owner BYD CO LTD
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