Modified super-hydrophobic material-coated lithium ion battery high-nickel cathode material and preparation method thereof

A lithium-ion battery, cathode material technology, applied in electrode manufacturing, battery electrodes, active material electrodes, etc., can solve the problem of limited hydrophobicity of active materials, avoid re-absorption, improve cyclability and safety, and enhance hydrophobic affinity. Effects of Electrolyte Properties and Conductivity

Active Publication Date: 2016-02-17
BTR NEW MATERIAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to apply the composite film to lithium-ion batteries has not been involved. Moreover, when it is used as a film structure in lithium-ion batteries, it cannot form a coating effect on the surface of the positive electrode active material, so the hydrophobicity between the active materials will also be relatively limited.

Method used

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  • Modified super-hydrophobic material-coated lithium ion battery high-nickel cathode material and preparation method thereof
  • Modified super-hydrophobic material-coated lithium ion battery high-nickel cathode material and preparation method thereof
  • Modified super-hydrophobic material-coated lithium ion battery high-nickel cathode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] After vaporizing the liquid-phase butyl phthalate, use the carrier gas N 2 Introduce into the vapor deposition reactor equipped with superhydrophobic carbon nanotubes, control the mass ratio of nano-titanium dioxide and superhydrophobic carbon nanotube array film to 0.05:100, so that the generated nano-titanium dioxide (TiO 2 ) are uniformly deposited on the surface of the superhydrophobic carbon nanotube array film to obtain the modified superhydrophobic carbon nanotubes.

[0068] The above-mentioned modified superhydrophobic carbon nanotubes and LiNi with a particle size of 7-60 μm 0.6 co 0.2 mn 0.2 o 2 Electrode material powder, superhydrophobic carbon nanotubes and LiNi with a particle size of 7-60 μm 0.6 co 0.2 mn 0.2 o 2 The electrode material powders were dispersed in the ethanol solution at a mass ratio of 0.25:100 and mechanically stirred for 1 h, while the LiNi 0.6 co 0.2 mn 0.2 o 2 The electrode material powder was dispersed in the ethanol solution...

Embodiment 2

[0080] Add 0.01g of nano-zirconia with a particle size of 30nm-100nm into 100g of superhydrophobic carbon fiber film ethanol dispersion, and vigorously stir mechanically for 1.5h to fully distribute nano-zirconia on the surface of super-hydrophobic carbon fiber film to obtain nano-zirconia modified superhydrophobic Hydrophobic carbon fiber film material. Take 0.5g of LiNi with a particle size of 3-50μm 0.815 co 0.15 Al 0.035 o 2 Disperse the electrode material powder in 20mL of 10% modified superhydrophobic carbon fiber film material dispersion, ultrasonically disperse for 1 hour, so that the modified superhydrophobic carbon fiber film is evenly coated on the surface of the electrode material, and dry the solid at 200°C after centrifugation 12h to obtain LiNi coated with modified superhydrophobic carbon fiber film 0.815 co 0.15 Al 0.035 o 2 Cathode material.

Embodiment 3

[0082] Add 0.01g of nano-MgO with a particle size of 30nm-100nm into 100g of superhydrophobic polyacrylonitrile nanofiber ethanol dispersion, ultrasonically disperse for 30min and cook at 200°C with mechanical stirring until the ethanol is completely removed to obtain nano-MgO surface-modified superhydrophobic polypropylene Nitrile nanofibers, the above-mentioned modified superhydrophobic polyacrylonitrile nanofibers and LiNi with a particle size of 10-100 μm 0.8 co 0.1 mn 0.1 o 2 The electrode material powder was dispersed in an ethanol solution with a mass ratio of 0.25:100 and mechanically stirred for 30 minutes, and then spray-dried to obtain LiNi coated with modified superhydrophobic polyacrylonitrile nanofibers. 0.8 co 0.1 mn 0.1 o 2 electrode material, and then dried at 200°C for 24 hours to obtain LiNi coated with modified superhydrophobic polyacrylonitrile nanofibers with suitable moisture and specific surface area 0.8 co 0.1 mn 0.1 o 2 Lithium-ion battery ca...

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Abstract

The invention relates to a modified super-hydrophobic material-coated lithium ion battery high-nickel cathode material and a preparation method thereof. The surface of the lithium ion battery high-nickel cathode material is coated with a modified super-hydrophobic material, and particles and particles are bridged by the modified super-hydrophobic material; the modified super-hydrophobic material is obtained by depositing a nano material on the surface of a super-hydrophobic material. Through surface modification of the super-hydrophobic material, the hydrophobic and electrolyte hydrophilic properties and the electrical conductivity of the super-hydrophobic material are improved, then the modified super-hydrophobic material is coated on the surface of the particles of the lithium ion battery high-nickel cathode material and between the particles in a form of three dimensional network, and thus the high-nickel cathode material surface hydrophobic electric conductive treatment is effectively realized, reaction of environmental moisture with surface free lithium and side reactions generated by trace water and an electrolyte are reduced, and safety, circularity and storage performance of the lithium ion battery high-nickel cathode material in batteries are improved.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery cathode materials, in particular to a lithium-ion battery high-nickel cathode material and a preparation method thereof, in particular to a lithium-ion battery high-nickel cathode material coated with a modified superhydrophobic material and a preparation method thereof. Background technique [0002] With the continuous expansion of the application range of lithium-ion batteries, higher requirements are put forward for the energy density, safety and cycle performance of battery materials. [0003] Lithium-ion battery cathode active materials have a significant impact on the energy density, safety performance and cycle performance of lithium-ion batteries. Common cathode active materials for lithium-ion batteries include lithium iron phosphate, lithium cobalt oxide, lithium manganate, and nickel-cobalt lithium manganese oxide. , lithium nickel cobalt aluminate and lithium-rich materials, etc. Am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M10/0525
CPCH01M4/366H01M4/38H01M10/0525H01M4/0421H01M4/0471H01M4/131H01M4/1391H01M4/62B82Y30/00H01M2004/028Y10S977/748Y10S977/847Y10S977/948Y02E60/10H01M4/525B01J13/04B82Y40/00H01M4/505H01M4/624H01M4/625
Inventor 罗亮杨顺毅吴小珍
Owner BTR NEW MATERIAL GRP CO LTD
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