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

A kind of cerium-zirconium co-doped porous structure cathode material and preparation method thereof

A positive electrode material and porous structure technology, which is applied in the field of cerium-zirconium co-doped porous structure positive electrode materials and its preparation, can solve the problems of low sintering temperature of high-nickel materials, increase production process and auxiliary materials, reduce material battery performance, etc. The effect of small particles, improving capacity and cycle performance, reducing reaction pH and stirring speed

Active Publication Date: 2021-02-19
JINGMEN GEM NEW MATERIAL +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, adding other substances will increase the production process and auxiliary materials, and the manufacturing cost of the product will further increase
[0008] The sintering temperature of high-nickel materials is relatively low, and the distribution of elements in solid-phase doping is difficult to be uniform at low temperatures, which will reduce the battery performance of the material

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 kind of cerium-zirconium co-doped porous structure cathode material and preparation method thereof
  • A kind of cerium-zirconium co-doped porous structure cathode material and preparation method thereof
  • A kind of cerium-zirconium co-doped porous structure cathode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] A method for preparing a cerium-zirconium co-doped porous structure positive electrode material, comprising the following steps:

[0041] (1) Prepare ternary solution, cerium-zirconium blended salt solution, precipitant solution and complexing agent solution for use;

[0042] (2) Prepare bottom liquid and stir;

[0043] (3) Inject the ternary solution, the mixed solution of cerium salt and zirconium salt, the precipitant solution and the complexing agent solution into the bottom solution, and carry out the reaction of stage I and stage II until the reaction reaches the target particle size, then stop feeding ;

[0044] (4) Centrifugal washing, drying, sieving, and iron removal of the reacted slurry to obtain a precursor;

[0045] (5) Mix the precursor with the lithium source and sinter to obtain the positive electrode material; preferably, mix the cerium-zirconium co-doped ternary precursor with the lithium source, and sinter at 700-1000°C for 10-20h in air or oxygen ...

Embodiment 1

[0056] Preparation of Ce-Zr Co-doped NCM811 Porous Cathode Material

[0057] Methods as below:

[0058] Step 1. Nickel sulfate, cobalt sulfate and manganese sulfate are formulated into aqueous solution A with a total metal concentration of 2mol / L in a metal molar ratio of 8:1:1, and cerium sulfate and zirconium sulfate are formulated into a total metal concentration in a metal molar ratio of 1:2. The aqueous solution B with a concentration of 0.05mol / L adopts 32% industrial liquid caustic soda as precipitating agent C, and 17% ammonia water as complexing agent D.

[0059] Step 2, add 5000L pure water to the reactor and feed N 2 As a protective gas, use solution D to adjust the ammonia concentration of the bottom liquid to 10 g / L, and use solution C to adjust the pH of the bottom liquid to 11.9-12.0. The temperature was set at 60° C., and the stirring speed was set at 400 rpm.

[0060] Step 3. Add solution A, solution B, solution C and solution D to the reactor at the same t...

Embodiment 2

[0066] Preparation of Ce-Zr Co-doped NCM880606 Porous Cathode Material

[0067] Methods as below:

[0068] Step 1. Nickel sulfate, cobalt sulfate and manganese sulfate are prepared into aqueous solution A with a total metal concentration of 2mol / L by metal molar ratio 88:6:6, and cerium sulfate and zirconium sulfate are prepared by metal molar ratio 1:1 to make total metal The aqueous solution B with a concentration of 0.02mol / L adopts 32% industrial liquid caustic soda as the precipitating agent C, and 17% ammonia water as the complexing agent D.

[0069] Step 2, add 5000L pure water to the reactor and feed N 2 As a protective gas, use solution D to adjust the ammonia concentration of the bottom liquid to 7.5g / L, and use solution C to adjust the pH of the bottom liquid to 11.8-11.9. The temperature was set at 65° C., and the stirring speed was set at 380 rpm.

[0070] Step 3. Add solution A, solution B, solution C and solution D to the reactor at the same time at the speed...

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 a cerium-zirconium co-doped porous structure cathode material and a preparation method thereof. The method is as follows: (1) prepare ternary solution, cerium-zirconium blended salt solution, precipitant solution and complexing agent solution for use; (2) prepare bottom liquid and stir; (3) mix ternary solution, cerium salt and zirconium The mixed solution of salt, the precipitating agent solution and the complexing agent solution are injected into the bottom liquid, and the reaction of stage I and stage II is carried out until the reaction reaches the target particle size, and the feeding is stopped; (4) the slurry after the reaction is centrifugally washed , drying, screening, and iron removal to obtain a precursor; (5) mixing the precursor with a lithium source and sintering to obtain a positive electrode material. The present invention uses liquid phase doping to dope the blended cerium-zirconium salt solution into the ternary solution, so that the doping elements are evenly distributed, and the battery cycle performance of the material is improved by utilizing their synergistic effect; through the process control in different reaction stages, the A positive electrode material with a pore structure, high purity and good performance is prepared.

Description

technical field [0001] The invention belongs to the field of electrode materials and electrochemical energy storage, and specifically relates to a positive electrode material with a cerium-zirconium co-doped porous structure and a preparation method thereof. Background technique [0002] Cathode material is the most important part of lithium-ion batteries, which is related to the performance parameters and product prices of lithium-ion batteries such as capacity, rate, safety performance, cycle times, and service life. [0003] At present, cathode materials with porous structure have been paid more and more attention and researched. Porous cathode materials have the following advantages: On the one hand, porous materials can store more electrolyte to improve the cycle performance during charge and discharge; its safety performance. [0004] The pursuit of high capacity has led to the development of ternary materials in the direction of high nickel, but the cycle performanc...

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): H01M4/505H01M4/52H01M10/0525
CPCH01M4/505H01M4/52H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 许开华蒋振康张坤李聪陈康孙海波黎俊范亮姣薛晓斐
Owner JINGMEN GEM NEW MATERIAL
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