Ternary-core quaternary-shell cathode material, preparation method and use

A technology of positive electrode material and core-shell structure, which is applied in the field of positive electrode material precursors, can solve the problems of poor cycle performance and electrochemical stability, high production cost of lithium cobalt oxide, and low specific energy of the battery, so as to avoid particle shape and Effect of performance, elimination of oxygen defects, effect of high crystallinity

Inactive Publication Date: 2019-04-05
LIONANOCHINAINC +1
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The positive electrode materials for ion batteries that we are familiar with mainly include lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, core-shell structure positive electrode materials, and lithium iron phosphate. However, due to the lack of cobalt resources and high toxicity, the production cost of lithium cobalt oxide It remains high and has an irreversible impact on the environment; the rich resources of lithium nickelate have advantages in terms of gram capacity and specific energy, but its cycle performance is poor, which limits its industrial application; Lithium has the advantages of abundant resources, low cost, no pollution, good safety, and good rate performance, but its cycle performance and electrochemical stability are poor, which greatly limits its industrialization; the safety and cycle of lithium iron phosphate materials Lifespan has significant advantages, but the compaction density of the material itself is too low, resulting in low specific energy of the battery, which limits the room for improvement in the cruising range of the vehicle; the cost of the core-shell structure positive electrode material is low, equivalent to lithium cobalt oxide Compared with several other materials, it improves the energy density of the battery, but its safety is not high enough at present

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
  • Ternary-core quaternary-shell cathode material, preparation method and use
  • Ternary-core quaternary-shell cathode material, preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A positive electrode material precursor, the positive electrode material precursor

[0059] It is a core-shell structure with a core-shell molar ratio of 0.7:0.3

[0060] The material chemical formula of the core is Ni 0.815 co 0.15 Al 0.035 (OH) 2 , the material chemical formula of the shell is Ni 0.50 co 0.20 Al 0.15 mn 0.15 CO 3 , its preparation method is:

[0061] Step (a), precursor nucleus Ni 0.815 co 0.15 Al 0.035 (OH) 2 preparation of

[0062] Calculate and weigh soluble nickel salt, soluble cobalt salt, soluble aluminum salt and soluble manganese salt according to the molar ratio of each element Ni: Co: Al=0.815:0.15:0.035; add them together in deionized water and mix to prepare 1mol / the first solution A of L;

[0063] Mix the first solution A, ammonia water, and sodium carbonate solution, control PH=7, and react at a constant temperature at 60°C for 3h, cool to 30°C, filter, wash, and dry the precipitate to obtain the precursor core Ni 0.815 ...

Embodiment 2

[0066] A positive electrode material precursor, the positive electrode material precursor is a core-shell structure, and the core-shell molar ratio is 0.8:0.2

[0067] The material chemical formula of the core is Ni 0.815 co 0.14 Al 0.045 (OH) 2 , the material chemical formula of the shell is Ni 0.50 co 0.20 Al 0.15 mn 0.15 (OH) 2 , its preparation method is:

[0068] Step (a), precursor nucleus Ni 0.815 co 0.14 Al 0.045 (OH) 2 preparation of

[0069] Calculate and weigh soluble nickel salt, soluble cobalt salt, soluble aluminum salt and soluble manganese salt according to the molar ratio of each element Ni: Co: Al=0.815:0.14:0.045; add them together in deionized water and mix to prepare 1mol / the first solution A of L;

[0070] Mix the first solution A, ammonia water, and sodium carbonate solution, control PH=7, and react at a constant temperature at 60°C for 3h, cool to 30°C, filter, wash, and dry the precipitate to obtain the precursor core Ni 0.815 co 0.14 ...

Embodiment 3

[0073] A positive electrode material precursor, the positive electrode material precursor is a core-shell structure, the core-shell molar ratio is 0.9:0.1, and the material chemical formula of the core is Ni 0.815 co 0.16 Al 0.025 CO 3 , the material chemical formula of the shell is Ni 0.60 co 0.20 Al 0.10 mn 0.10 (OH) 2 , its preparation method is:

[0074] Step (a), precursor nucleus Ni 0.815 co 0.16 Al 0.025 (OH) 2 preparation of

[0075] According to the molar ratio of each element Ni:Co:Al=0.815:0.16:0.025

[0076] Calculate and weigh soluble nickel salt, soluble cobalt salt, soluble aluminum salt and soluble manganese salt; add them together to deionized water and mix to prepare the first solution A of 1mol / L;

[0077] Mix the first solution A, ammonia water, and sodium carbonate solution, control PH=7, and react at a constant temperature at 60°C for 3h, cool to 30°C, filter, wash, and dry the precipitate to obtain the precursor core Ni 0.815 co 0.16 Al 0...

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
sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The present invention provides a positive electrode material precursor which is a core-shell structure. The material chemical formula of the core is Ni1-x-yCoxAly(OH)2. The material chemical formula of the shell is Ni1-r-s-tCorAlsMntCO3, wherein 1-x-y is a value in a range of 0.80 to 0.96, x is greater than 0, y is a value in a range of 0.01 to 0.10, 1-r-s-t is a value in a range of 0.34 to 0.70,r is greater than 0, s is a value in a range of 0.20 to 0.40, and t is a value in a range of 0.20 to 0.40. The positive electrode material of the invention is stable in structure, high in safety performance, long in cycle life and good in thermal stability.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a positive electrode material precursor, positive electrode material, preparation method and application. Background technique [0002] As a new type of green energy, lithium-ion batteries have the advantages of high specific energy, small self-discharge, high open circuit voltage, no memory effect, long cycle life, and no environmental pollution, so they are widely used in mobile phones, notebook computers, digital cameras, etc. At the same time, lithium-ion batteries are also power sources for electric vehicles and energy storage power sources for solar renewable energy. The positive electrode materials for ion batteries that we are familiar with mainly include lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, core-shell structure positive electrode materials, and lithium iron phosphate. However, due to the lack of cobalt resources and high toxicity, the pr...

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): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 任东于英超沈赟方艳
Owner LIONANOCHINAINC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap