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

Preparation method of all-gradient high-nickel ternary precursor and all-gradient high-nickel ternary cathode material

A positive electrode material and full-gradient technology, which is applied in the direction of electrical components, battery electrodes, structural parts, etc., can solve the problems that full-gradient materials are difficult to implement industrial production, and achieve the effects of easy control, reduced phase boundary resistance, and high capacity

Active Publication Date: 2018-01-12
湖南桑瑞新材料有限公司
View PDF13 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a full-gradient high-nickel ternary precursor and a preparation method for a full-gradient high-nickel ternary positive electrode material, and solve the technical problem that full-gradient materials are difficult to implement industrial production

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
  • Preparation method of all-gradient high-nickel ternary precursor and all-gradient high-nickel ternary cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see figure 1 , the process schematic diagram of the preparation method of the full-gradient high-nickel ternary positive electrode material, adding nickel sulfate and cobalt sulfate in deionized water to prepare 400L mixed solution A, and controlling the molar concentration of nickel and cobalt in the mixed solution A. The ratio is 0.95:0.05, and the sum of the molar concentration of nickel and cobalt in the control mixed solution A is 3mol / L; the mixed solution A is stored in the first raw material tank, and the stirring device arranged in the first raw material tank is started; Add nickel sulfate, cobalt sulfate, and manganese sulfate to deionized water to prepare a 200L mixed solution B, and control the molar concentration of nickel, cobalt, and manganese in the mixed solution B to a ratio of 5:2:3. The sum of the molar concentration of nickel, the molar concentration of cobalt and the molar concentration of manganese in mixed solution B is 2mol / L; Mixed solution B i...

Embodiment 2

[0044] see figure 1 , the schematic diagram of the process flow of the preparation method of the full-gradient high-nickel ternary positive electrode material, adding nickel sulfate, cobalt sulfate, and manganese sulfate in deionized water to prepare 300L mixed solution A, and controlling the molar concentration of nickel and cobalt in the mixed solution A The ratio of the molar concentration to the molar concentration of manganese is 8:1:1, and the sum of the molar concentration of nickel and cobalt in the mixed solution A is controlled to be 2mol / L; the mixed solution A is stored in the first raw material tank and started Stirring device provided in the first raw material tank; add nickel sulfate, cobalt sulfate, manganese sulfate in deionized water to prepare 100L mixed solution B, control the molar concentration of nickel, cobalt and manganese in the mixed solution B The ratio is 6:2:2, and the sum of the molar concentration of nickel, cobalt and manganese in the control m...

Embodiment 3

[0046] see figure 1, the schematic diagram of the process flow of the preparation method of the full-gradient high-nickel ternary positive electrode material, nickel sulfate is added to deionized water to prepare 300L mixed solution A, and the molar concentration of nickel in the mixed solution A is controlled to be 4mol / L; the mixed solution A Store in the first raw material tank, start the stirring device that is provided with in the first raw material tank; Add nickel sulfate, cobalt sulfate, manganese sulfate in deionized water, prepare the mixed solution B of 100L, control the molar concentration of nickel in the mixed solution B, The ratio of the molar concentration of cobalt to the molar concentration of manganese is 4:2:4, and the sum of the molar concentration of nickel, the molar concentration of cobalt and the molar concentration of manganese in the mixed solution B is controlled to be 2mol / L; the mixed solution B is stored in In the second raw material tank, start ...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of an all-gradient high-nickel ternary precursor and an all-gradient high-nickel ternary cathode material. The preparation method comprises the following steps: preparing a mixed solution A, a mixed solution B and a mixed solution C; performing parallel flow of the mixed solution A, an alkali solution and a complexing agent and pumping into a reaction kettle; continuously pumping the mixed solution B into the mixed solution A at the velocity of V1 after reaction time T1; continuously pumping the mixed solution C into the mixed solution B at the velocity of V2 after reaction time T2, thus realizing continuous progressive change of feeding materials and components of nickel salt, cobalt salt and manganese salt to obtain the all-gradient high-nickel ternary precursor; mixing a lithium source compound and the all-gradient high-nickel ternary precursor according to the molar rate to obtain a mixture; sintering the obtained mixture under an oxygenatmosphere; performing after-treatment after sintering to obtain the all-gradient high-nickel ternary cathode material. The preparation method disclosed by the invention is high in operability, easyto control, and can be used for industrial production; moreover, the obtained product has high content and is good in cycling stability.

Description

technical field [0001] The invention belongs to the technical field of positive electrode materials for lithium ion batteries, and in particular relates to a full-gradient high-nickel ternary precursor and a preparation method for a full-gradient high-nickel ternary positive electrode material. Background technique [0002] The energy crisis and energy security are the severe tests that countries in the world are currently facing. Improving the energy structure and realizing energy diversification is an inevitable choice for national development. Due to its advantages of high voltage, high specific energy, good cycle performance, and low environmental pollution, lithium-ion batteries have become a key direction for the development of new energy industries in various countries. The lithium-ion cathode material is an important part of the lithium-ion battery and a key point in the performance of the lithium-ion battery. [0003] The nickel-cobalt-manganese ternary cathode mat...

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): H01M4/36H01M4/50H01M4/505H01M4/52H01M4/525H01M10/0525
CPCY02E60/10
Inventor 陈敏唐泽勋商士波邹少良冯泽
Owner 湖南桑瑞新材料有限公司
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