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

Method for preparing lithium nickel cobalt manganese oxide single-crystal ternary material

A technology for nickel-cobalt lithium manganate and ternary materials is applied in the field of preparing nickel-cobalt lithium manganate single crystal ternary materials, which can solve the problems of difficult industrialized production, complicated preparation process, poor electrochemical performance, etc. The effect of easy control, simple preparation process and stable material properties

Active Publication Date: 2019-11-15
HUBEI RT ADVANCED MATERIALS CO LTD
View PDF14 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing nickel cobalt lithium manganate single crystal ternary material in order to overcome the problems of complex preparation process, difficulty in industrialized production, poor electrochemical performance and poor cycle performance in the prior art

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 lithium nickel cobalt manganese oxide single-crystal ternary material
  • Method for preparing lithium nickel cobalt manganese oxide single-crystal ternary material
  • Method for preparing lithium nickel cobalt manganese oxide single-crystal ternary material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The preparation process of nickel cobalt lithium manganate single crystal ternary material A1 is as follows:

[0060] (1) The average particle size D 50 3.55μm spherical precursor (Ni 0.5 co 0.2 mn 0.3 )OH and average particle size D 50 10.44μm battery grade lithium carbonate according to Li:Ni 0.5 co 0.2 mn 0.3 =1.06:1 carries out proportioning, adds nanoscale zirconia (average particle diameter is 60nm) simultaneously, makes the mass content of zirconium in the mixture be 0.17% of the total mass of mixture;

[0061] (2) transfer the compound obtained in step (1) into a VC mixer and carry out dry mixing, the VC mixer rotating speed is 600rpm, and the mixing time is 50min, and no white spots can be observed in the mixing state;

[0062] (3) Put the mixed material obtained in step (2) into a sagger, place it in a box furnace, and heat it at a constant temperature of 955°C for 12 hours in an air atmosphere to carry out the roasting reaction. After the sintering is ...

Embodiment 2

[0065] The preparation process of nickel cobalt lithium manganate single crystal ternary material A2 is as follows:

[0066] (1) The average particle size D 50 3.45μm spherical precursor (Ni 0.5 co 0.2 mn 0.3 )OH and average particle size D 50 11.44μm battery grade lithium carbonate according to Li:Ni 0.5 co 0.2 mn 0.3 =1.06:1 carries out proportioning, adds nanoscale zirconia (average particle diameter is 80nm) simultaneously, makes the mass content of zirconium in the mixture be 0.17% of the total mass of mixture;

[0067] (2) transfer the compound obtained in step (1) into a VC mixer and carry out dry mixing, the VC mixer rotating speed is 650rpm, the mixing time is 45min, and no white spots can be observed in the mixing state;

[0068] (3) Put the mixed material obtained in step (2) into a sagger, place it in a box-type furnace, and heat it at a constant temperature of 952°C for 13 hours in an air atmosphere to carry out the roasting reaction. After the sintering is...

Embodiment 3

[0071] The preparation process of nickel cobalt lithium manganate single crystal ternary material A3 is as follows:

[0072] (1) The average particle size D 50 3.44μm spherical precursor (Ni 0.5 co 0.2 mn 0.3 )OH and average particle size D 50 10.48μm battery grade lithium carbonate according to Li:Ni 0.5 co 0.2 mn 0.3 =1.06:1 carries out proportioning, adds nanoscale zirconia (average particle diameter is 50nm) simultaneously, makes the mass content of zirconium in the mixture be 0.17% of the total mass of mixture;

[0073] (2) transfer the compound obtained in step (1) into a VC mixer and carry out dry mixing, the VC mixer rotating speed is 550rpm, and the mixing time is 55min, and no white spots can be observed in the mixing state;

[0074] (3) Put the mixture obtained in step (2) into a sagger, place it in a box furnace, and heat it at a constant temperature of 957°C for 11 hours in an air atmosphere to carry out the roasting reaction. After the sintering is complet...

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 sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of ternary positive electrode materials, and discloses a method for preparing a lithium nickel cobalt manganese oxide single-crystal ternary material. The method comprises the following steps: (1) mixing a precursor (Ni0.5Co0.2Mn0.3)OH with battery grade lithium carbonate, and adding a zirconium compound to enable the mass content of zirconium in the obtained mixture is 0.1-0.25% of the total mass of the mixture; (2) performing dry mixing on the mixture obtained in step (1); (3) roasting the mixture obtained in step (2) to obtain a material block; and (4) carrying out rotating wheel based grinding, air flow based grinding and sieving in sequence on the material block obtained in step (3), wherein the average particle size D50 of the battery grade lithiumcarbonate is 10-12 microns. The method has a simple preparation process and can be easily applied to industrial application. The obtained lithium nickel cobalt manganese oxide single-crystal ternary material has excellent electrochemical performance, stable material performance and good cycling performance.

Description

technical field [0001] The invention relates to the field of ternary positive electrode materials, in particular to a method for preparing nickel cobalt lithium manganese oxide single crystal ternary material. Background technique [0002] Ternary cathode materials are a type of cathode materials commonly used in lithium-ion batteries. At present, there are two mainstream directions for ternary cathode materials, namely high-capacity materials and high-voltage materials. High-capacity materials generally refer to high-nickel materials, which have the following defects: 1. Li + / Ni 2+ Ion mixing is serious. The higher the nickel content in the material, the easier it is to produce cation mixing effect; 2. High nickel materials generally have a high residual alkali. On the other hand, it is necessary to reduce the amount of residual alkali by washing with water; 3. The cycle performance of high-nickel materials is poor; 4. The high-temperature performance of high-nickel mate...

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): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 何雅孙杰汪杰石浪
Owner HUBEI RT ADVANCED MATERIALS 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