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A kind of high nickel ternary composite positive electrode and lithium ion battery containing solid electrolyte

A solid electrolyte, ternary composite technology, applied in the direction of batteries, positive electrodes, electrical components, etc., can solve the problems of high temperature cycle performance, high temperature storage performance, safety, structural stability and thermal stability. Improve the effect of reducing ionic conductivity, high energy density, and not easy to fall off

Active Publication Date: 2022-05-13
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the nickel content increases, the structural stability and thermal stability of the material decrease, resulting in a decrease in high-temperature cycle performance, high-temperature storage performance, and a significant decrease in safety.

Method used

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  • A kind of high nickel ternary composite positive electrode and lithium ion battery containing solid electrolyte
  • A kind of high nickel ternary composite positive electrode and lithium ion battery containing solid electrolyte
  • A kind of high nickel ternary composite positive electrode and lithium ion battery containing solid electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Stir 1.5 parts of PVDF until transparent glue, add 1.3 parts of carbon nanotube / conductive carbon black mixture, stir well, then add 97.2 parts of NCM811, continue stirring, then add 0.1 parts of inorganic solid electrolyte Li 2 O-Al 2 o 3 -SiO 2 -P 2 o 5 -TiO 2 -GeO, stirred and dispersed evenly, then coated on the surface of the aluminum current collector, dried for use;

[0052] Stir 1.3 parts of CMC until transparent, add 1 part of conductive graphite, stir evenly, then add 96 parts of artificial graphite, continue stirring, then add 1.7 parts of styrene-butadiene rubber emulsion, stir and disperse evenly, and evenly coat the surface of the negative electrode collector. drying for use;

[0053] The coated positive and negative electrodes are cut and punched, and then the positive and negative electrodes are separated by a diaphragm, packaged with aluminum-plastic film, injected with self-made electrolyte, fully infiltrated, and dissolved to obtain lithium ion...

Embodiment 2

[0055] Stir 1.5 parts of PVDF until transparent glue, add 1.3 parts of carbon nanotube / conductive carbon black mixture, stir well, then add 96.7 parts of NCM811, continue stirring, then add 0.5 parts of inorganic solid electrolyte Li 2 O-Al 2 o 3 -SiO 2 -P 2 o 5 -TiO 2 -GeO, stirred and dispersed evenly, then coated on the surface of the aluminum current collector, dried for use;

[0056] Stir 1.3 parts of CMC until transparent, add 1 part of conductive graphite, stir evenly, then add 96 parts of artificial graphite, continue stirring, then add 1.7 parts of styrene-butadiene rubber emulsion, stir and disperse evenly, and evenly coat the surface of the negative electrode collector. drying for use;

[0057] The coated positive and negative electrodes are cut and punched, and then the positive and negative electrodes are separated by a diaphragm, packaged with aluminum-plastic film, injected with self-made electrolyte, fully infiltrated, and dissolved to obtain lithium ion...

Embodiment 3

[0059] Stir 1.5 parts of PVDF until transparent glue, add 1.3 parts of carbon nanotube / conductive carbon black mixture, stir well, then add 96.2 parts of NCM811, continue stirring, then add 1 part of inorganic solid electrolyte Li 2 O-Al 2 o 3 -SiO 2 -P 2 o 5 -TiO 2 -GeO, stirred and dispersed evenly, then coated on the surface of the aluminum current collector, dried for use;

[0060] Stir 1.3 parts of CMC until transparent, add 1 part of conductive graphite, stir evenly, then add 96 parts of artificial graphite, continue stirring, then add 1.7 parts of styrene-butadiene rubber emulsion, stir and disperse evenly, and evenly coat the surface of the negative electrode collector. drying for use;

[0061] The coated positive and negative electrodes are cut and punched, and then the positive and negative electrodes are separated by a diaphragm, packaged with aluminum-plastic film, injected with self-made electrolyte, fully infiltrated, and dissolved to obtain lithium ion ba...

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Abstract

The invention relates to the field of lithium batteries, and discloses a high-nickel ternary composite positive electrode containing a solid electrolyte and a lithium ion battery. The composite positive electrode includes a positive electrode current collector and a positive electrode material layer on the positive electrode current collector. The positive electrode material layer consists of a positive electrode The positive electrode slurry of active material, inorganic solid electrolyte, conductive agent and binder is solidified. The lithium-ion battery containing the high-nickel ternary composite positive electrode of the present invention can have high energy density and high power density at the same time, and the lithium-ion battery rate, high-temperature storage and cycle performance are improved, while ensuring the safety performance of the battery to meet the needs of power batteries .

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a high-nickel ternary composite positive electrode containing a solid electrolyte and a lithium ion battery. Background technique [0002] With the rapid development of electric vehicles, the requirements for lithium-ion batteries are also getting higher and higher. Lithium-ion batteries not only need to have high energy density and high power density, but also need to have excellent high temperature performance, long cycle life and high safety. However, the energy density of commercial lithium-ion batteries at this stage is low, and it is difficult to meet both high energy density and high power density at the same time, which cannot meet the growing demand of electric vehicles. Therefore, the development of lithium-ion batteries with high energy density and high power density has become a hot topic of social research and a trend of industry development, which plays an importan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/62H01M4/485H01M4/505H01M4/525H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/624H01M4/628H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028H01M2004/021H01M2220/20Y02E60/10
Inventor 田军陈彬苏敏韩笑李凡群
Owner WANXIANG 123 CO LTD
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