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

High-nickel ternary positive electrode material and preparation method thereof

A positive electrode material and high-nickel technology, applied in the field of materials, can solve the problems of poor material uniformity, uneven lithium mixing, cycle performance, rate performance, storage performance and high temperature performance, and achieve splash prevention, excellent uniformity and crystallinity high effect

Inactive Publication Date: 2021-04-20
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method for preparing a high-nickel ternary positive electrode material in view of the problems of uneven lithium mixed, poor material uniformity, poor cycle performance, rate performance, storage performance and high temperature performance in current positive electrode materials, The high-nickel ternary cathode material prepared by this method can maintain the original (such as spherical) morphology of the high-nickel ternary precursor, and greatly improve the uniformity, cycle stability and rate performance of the high-nickel ternary cathode 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
  • High-nickel ternary positive electrode material and preparation method thereof
  • High-nickel ternary positive electrode material and preparation method thereof
  • High-nickel ternary positive electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment discloses a high-nickel ternary positive electrode material and a preparation method thereof, comprising the following steps:

[0038] Step 1. Take a certain amount of NCM622 precursor in the roasting furnace with stirring function, set the stirring speed to 120 rpm, and the heating program is: increase from room temperature to 280 °C at a heating rate of 3 °C / min, and keep the temperature at this temperature. 3h, after the program is finished, cool down to room temperature with the furnace;

[0039] Step 2, according to the molar ratio n (Li) / n (Ni+Co+Mn) =1.10 Weigh the lithium source and NCM622 oxide respectively, and place them in a roasting furnace with stirring function after premixing;

[0040] Step 3. Set the stirring speed to 300 rpm, and the heating program is: the first stage: raise the temperature from room temperature to 500 °C at a heating rate of 4 °C / min, keep at this temperature for 5 hours, and the second stage: increase the temperat...

Embodiment 2

[0043] This embodiment discloses a high-nickel ternary positive electrode material and a preparation method thereof, comprising the following steps:

[0044] Step 1. Take a certain amount of NCM622 precursor in a roasting furnace with stirring function, set the stirring speed to 150rpm, and the heating program is: increase the temperature from room temperature to 300°C at a heating rate of 3°C / min, and keep warm at this temperature 3h, after the end of the program, cool down to room temperature with the furnace;

[0045] Step 2, according to the molar ratio n (Li) / n (Ni+Co+Mn) =1.20 Take by weighing lithium source and NCM622 oxide respectively, place in the calciner with stirring function after premixing;

[0046] Step 3. Set the stirring speed to 250rpm, and the heating program is as follows: the first section: raise the temperature from room temperature to 500°C at a heating rate of 4°C / min, and keep at this temperature for 5 hours; Min heating rate, raised to 800 ° C, k...

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
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention provides a high-nickel ternary positive electrode material and a preparation method thereof. The preparation method of the high-nickel ternary positive electrode material comprises the following steps of placing a high-nickel ternary precursor in a roasting furnace or a rotary kiln with a stirring function, carrying out low-temperature dehydration presintering while stirring is performed, and acquiring high-nickel ternary oxide; weighing a lithium source and a high-nickel ternary oxide according to a molar ratio of n (Li) / n (Ni+Co+Mn) of 1.03-1.20 respectively, and premixing to obtain a mixture; putting the mixture into the roasting furnace with the stirring function, and carrying out two-stage roasting while stirring; and washing, drying and secondarily sintering the roasted material to obtain the high-nickel ternary positive electrode material. According to the method, the original morphology of the high-nickel ternary precursor can be maintained, and the uniformity, the cycling stability and the rate capability of the high-nickel ternary positive electrode material are greatly improved.

Description

technical field [0001] The invention relates to material technology, in particular to a high-nickel ternary positive electrode material and a preparation method thereof. Background technique [0002] As a new generation of rechargeable high-energy batteries, lithium-ion secondary batteries have the advantages of high energy, good safety performance, long service life, low pollution, no memory effect and low self-discharge, and are widely used in mobile phones, digital cameras, notebook computers, etc. , instrumentation, electric vehicles and many other fields. [0003] High-nickel ternary cathode material refers to a ternary cathode material with a mole fraction of nickel greater than or equal to 0.6. It combines the characteristics of good cycle performance of lithium cobaltate, high specific capacity of lithium nickelate, and reliable safety performance of lithium manganate. And its comprehensive performance is better than any single combination compound, there is obvious...

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
CPCY02E60/10
Inventor 孟昭扬李宗麟魏晶曹永强刘阳荣明
Owner DALIAN RONGKE ENERGY STORAGE GRP 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