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A kind of preparation method and application of metal oxide-coated lithium-ion battery cathode material

A cathode material and ion battery technology, which is applied to the preparation of battery cathode materials and the preparation of metal oxide-coated lithium ion battery cathode materials can solve the problems of cumbersome preparation process, high cost, complicated operation process and the like, and achieve a simple process. , Improve efficiency and simple operation

Active Publication Date: 2018-05-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers use atomic deposition, magnetron sputtering and other methods to modify the coating of metal oxides. However, due to the shortcomings of complex operation process, cumbersome preparation process and high cost, it is impossible to apply it in large-scale industrial production.

Method used

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  • A kind of preparation method and application of metal oxide-coated lithium-ion battery cathode material
  • A kind of preparation method and application of metal oxide-coated lithium-ion battery cathode material
  • A kind of preparation method and application of metal oxide-coated lithium-ion battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The ultra-fine aluminum powder with a particle size of 50nm is weighed respectively according to the mass percentage of 1% relative to the positive electrode material for aluminum powder and LiNi 0.8 co 0.15 al 0.05 o 2 The positive electrode material was added to an agate ball mill jar with a capacity of 250mL and filled with zirconia balls, and then the rotation speed was adjusted to 400p / min for grinding for 2h.

[0036](2) Add the ground mixture into a three-necked flask with a capacity of 250 mL and add 100 mL of deionized water, and stir and react at 50° C. for 1 h.

[0037] (3) Wash the precipitate obtained in step (2) with deionized water for 3 times, then wash with absolute ethanol for 3 times, then filter, and keep the filter cake in a blast oven at 80°C for 12 hours to obtain an aluminum hydroxide package Covered LiNi 0.8 co 0.15 Al 0.05 o 2 Precursors of cathode materials.

[0038] (4) Put the precursor obtained in step (3) into a crucible and ke...

Embodiment 2

[0045] (1) The superfine magnesium powder that particle diameter is 100nm weighs magnesium powder and 0.3Li respectively according to relative cathode material being 0.5% mass percent 2 MnO 3 0.7LiNi 0.333 co 0.333 mn 0.333 o 2 The positive electrode material was added to a corundum ball mill jar with a capacity of 250mL and filled with steel balls, and then the rotation speed was adjusted to 500p / min for grinding for 4h.

[0046] (2) Add the ground mixture into a three-necked flask with a capacity of 250 mL and add 100 mL of deionized water, and stir and react at 40° C. for 2 h.

[0047] (3) Wash the precipitate obtained in step (2) with deionized water for 3 times, then wash with absolute ethanol for 3 times, then filter, and filter the cake in a blast oven at 80°C for 12 hours to obtain a magnesium hydroxide package Covered 0.3Li 2 MnO 3 0.7LiNi 0.333 co 0.333 mn 0.333 o 2 Precursors of cathode materials.

[0048] (4) Put the precursor obtained in step (3) into ...

Embodiment 3

[0052] (1) The ultrafine cerium powder with a particle diameter of 200nm is weighed respectively according to the mass percentage of 2.0% of the positive electrode material and 0.5Li 2 MnO 3 0.5LiNi 0.5 co 0.2 mn 0.3 o 2 The positive electrode material was added to a nylon ball mill jar with a capacity of 250mL and filled with agate balls, and then the rotation speed was adjusted to 600p / min for grinding for 6h.

[0053] (2) Add the ground mixture into a three-necked flask with a capacity of 250 mL and add 100 mL of deionized water, and stir and react at 60° C. for 3 h.

[0054] (3) Wash the precipitate obtained in step (2) with deionized water for 3 times, then wash with absolute ethanol for 3 times, then filter, and keep the filter cake in a blast oven at 80°C for 12 hours to obtain a cerium hydroxide package Covered 0.5Li 2 MnO 3 0.5LiNi 0.5 co 0.2 mn 0.3 o 2 Precursors of cathode materials.

[0055] (4) Put the precursor obtained in step (3) into a crucible and...

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Abstract

The invention discloses a preparation method and application of a metal oxide coated cathode material for a lithium ion battery. After ball milling and mixing are carried out on nanoscale metal powder and a cathode material, water is added to the obtained mixture for reaction, thereby obtaining the cathode material of which surface is coated by metal hydroxide colloid; the cathode material of which surface is coated by the metal hydroxide colloid is calcined at a high temperature, thereby obtaining the cathode material of which surface forms a metal oxide coating layer. The metal oxide coating layer is compact and even and is good in stability. The prepared metal oxide coated cathode material for the lithium ion battery can be used for preparing the lithium ion battery which is high in cycling stability and long in cycling life. The preparation method of the metal oxide coated cathode material for the lithium ion battery is characterized in low cost, simple operation and environmental friendliness and can be applied to industrial production on a large scale.

Description

technical field [0001] The invention relates to a preparation method of a battery positive electrode material, in particular to a preparation method of a metal oxide-coated lithium ion battery positive electrode material and its application in lithium ion batteries, belonging to the technical field of lithium ion batteries. Background technique [0002] Today, the rapid development of mobile electronic devices, such as smart phones, digital cameras, and notebook computers, as well as electric and hybrid vehicles, has promoted the rapid development of lithium-ion secondary battery technology. However, the current cathode materials for lithium-ion batteries, such as lithium cobaltate, spinel lithium manganate, and lithium iron phosphate, all have the disadvantage of low cycle life and cannot meet the requirements of future pure electric equipment. Therefore, research and development of a cathode material with high cycle life has become a common goal of researchers all over the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/483H01M10/0525Y02E60/10
Inventor 张治安赖延清徐明张凯李劼
Owner CENT SOUTH UNIV
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