Unlock instant, AI-driven research and patent intelligence for your innovation.

High-performance ternary positive electrode material, preparation method thereof and lithium ion battery

A cathode material and high-performance technology, applied in the field of high-performance ternary cathode materials and their preparation, can solve the problems of poor cycle stability and low capacity, and achieve suitable for large-scale industrial applications, reduce the loss of Li, and improve the structure. The effect of stability

Inactive Publication Date: 2020-03-31
CNGR ADVANCED MATERIAL CO LTD
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a ternary positive electrode material with high capacity and good cycle stability, aiming to solve the problem of low capacity and poor cycle stability of the nickel-cobalt-manganese ternary positive electrode material in the prior art due to Li loss question

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-performance ternary positive electrode material, preparation method thereof and lithium ion battery
  • High-performance ternary positive electrode material, preparation method thereof and lithium ion battery
  • High-performance ternary positive electrode material, preparation method thereof and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] The present invention also provides a method for preparing the above-mentioned high-performance ternary cathode material, comprising the following steps:

[0044] S1. The ternary cathode material precursor Ni x co y mn (1-x-y) (OH) 2 fully mixed with the lithium source to obtain the first mixture;

[0045] S2. Sintering the first mixture obtained in S1 to obtain LiNi x co y mn (1-x-y) o 2 Matrix material;

[0046] S3. Fully mix the matrix material obtained in S2 with MO to obtain a second mixture; wherein, the MO is MgO, Al 2 o 3 , ZrO 2 、TiO 2 , Nb 2 o 5 any of

[0047] S4. Sintering the second mixture obtained in S3 to obtain a MO-coated ternary positive electrode material;

[0048] S5. Fully mix the MO-coated ternary cathode material in S4 with distilled water, and suction filter after stirring;

[0049] S6. The material after the suction filtration in S5 is sintered three times to obtain a high-performance modified ternary cathode material.

[0050]...

Embodiment 1

[0063] This embodiment provides a high-performance ternary positive electrode material. The ternary positive electrode material is a nickel-cobalt-manganese ternary positive electrode material, and the nickel-cobalt-manganese ternary positive electrode material is LiNi coated with MO. x co y mn (1-x-y) o 2 , the expression of its chemical composition is (I): LiNi x co y mn (1-x-y) o 2 / MO(Ⅰ); where MO is Al 2 o 3 , LiNi x co y mn (1-x-y) o 2 for LiNi 0.8 co 0.1 mn 0.1 o 2 ; Al in nickel-cobalt-manganese ternary cathode material 2 o 3 The mass fraction is 0.2%.

[0064] This embodiment also provides a method for preparing the above-mentioned high-performance ternary cathode material, comprising the following steps:

[0065] S1. The ternary cathode material precursor Ni 0.8 co 0.1 mn 0.1 (OH) 2 Pour it into a high-mixer with LiOH at a molar ratio of 1:1.05, and mix thoroughly to obtain the first mixture;

[0066] S2. Put the first mixture obtained in S1 in...

Embodiment 2

[0072] This embodiment provides a high-performance ternary positive electrode material. The ternary positive electrode material is a nickel-cobalt-manganese ternary positive electrode material, and the nickel-cobalt-manganese ternary positive electrode material is LiNi coated with MO. x co y mn (1-x-y) o 2 , the expression of its chemical composition is (I): LiNi x co y mn (1-x-y) o 2 / MO(Ⅰ); Among them, MO is MgO, LiNi x co y mn (1-x-y) o 2 for LiNi 0.8 co 0.1 mn 0.1o 2 ; The mass fraction of MgO in the nickel-cobalt-manganese ternary cathode material is 0.2%.

[0073] This embodiment also provides a method for preparing the above-mentioned high-performance ternary cathode material, comprising the following steps:

[0074] S1. The ternary cathode material precursor Ni 0.8 co 0.1 mn 0.1 (OH) 2 Pour it into a high-mixer with LiOH at a molar ratio of 1:1.05, and mix thoroughly to obtain the first mixture;

[0075] S2. Put the first mixture obtained in S1 into ...

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 provides a high-performance ternary positive electrode material, a preparation method thereof and a lithium ion battery, the high-performance ternary positive electrode material is MO-coated LiNixCoyMn (1-x-y) O2, wherein the chemical composition expression of the high-performance ternary positive electrode material is (I): LiNixCoyMn (1-x-y) O2 / MO (I), wherein MO is any one of MgO,Al2O3, ZrO2, TiO2 and Nb2O5, and Al2O3 is any one of MgO, Al2O3, ZrO2, TiO2 and Nb2O5; wherein the mass fraction of MO in the nickel-cobalt-manganese ternary positive electrode material is 0.1-5%. Thesurface of the ternary positive electrode material is coated with the metal oxide protective layer, so that the problem that the material structure is damaged due to the fact that Li is washed out inthe washing process is effectively solved, and the impedance of the material can be reduced; meanwhile, direct contact between the material and electrolyte in the reaction process can be avoided through coating, corrosion of the electrolyte is reduced, and the ternary positive electrode material has excellent electrochemical performance and structural stability.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials, and in particular relates to a high-performance ternary positive electrode material, a preparation method thereof, and a lithium-ion battery. Background technique [0002] With the rapid development of economy and society, energy shortage and environmental pollution need to be solved urgently, and the development of green and efficient new energy materials has become a top priority. As a new type of battery with high energy, excellent cycle performance, safety and environmental protection, lithium-ion battery has attracted much attention. It is widely used in portable electronic equipment, electric vehicles, military defense and other fields. Cathode material is one of the important factors affecting the performance of lithium-ion batteries. Therefore, the development of lithium-ion battery cathode materials with excellent performance is a current research hotspot...

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): H01M4/62H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M4/628H01M10/0525H01M2004/028Y02E60/10
Inventor 阎晓静李魁訚硕罗标
Owner CNGR ADVANCED MATERIAL CO LTD