Preparation method for ammonium fluoride modified nickel-cobalt-aluminum ternary positive electrode material

A cathode material, ammonium fluoride technology, which is applied in the field of preparation of ammonium fluoride modified nickel-cobalt-aluminum ternary cathode material, can solve the problems of high energy consumption, long preparation time, unfavorable for industrialized production and the like, and achieves low energy consumption , Easy to operate, significant energy saving effect

Inactive Publication Date: 2017-04-26
SHANDONG YUHUANG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process consumes a lot of energy, and the preparation time is too long, which is not conducive to industrial production

Method used

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  • Preparation method for ammonium fluoride modified nickel-cobalt-aluminum ternary positive electrode material
  • Preparation method for ammonium fluoride modified nickel-cobalt-aluminum ternary positive electrode material
  • Preparation method for ammonium fluoride modified nickel-cobalt-aluminum ternary positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) At room temperature, put ammonium fluoride particles and nickel-cobalt-lithium aluminate powder in an agate mortar with a mass ratio of 0.003:1, and grind for 30 minutes to make them evenly mixed;

[0033] (2) Put the ground mixture in a muffle furnace, raise the temperature to 500°C at a heating rate of 5°C / min, and keep it warm for 3 hours;

[0034] (3) After grinding the obtained product, sieve it with 400 mesh to obtain the final product, which is recorded as NCA-F-0.3%-1.

[0035] The electrochemical performance of lithium battery cathode materials was tested by constant current charge and discharge using Wuhan Landian CT2001A charge and discharge instrument. The experimental battery is carried out in a glove box filled with argon, and the electrolyte used is LiPF 6 / EC+DMC+EMC (volume ratio 1:1:1), the diaphragm is Celgard 2400 type diaphragm; the counter electrode is metal lithium sheet. The electrochemical performance of the material was investigated using...

Embodiment 2

[0041] (1) At room temperature, put ammonium fluoride particles and nickel-cobalt-lithium aluminate powder in an agate mortar with a mass ratio of 0.003:1, and grind for 20 minutes to make them evenly mixed;

[0042] (2) Put the ground mixture in a muffle furnace, raise the temperature to 500°C at a heating rate of 5°C / min, and keep it warm for 3 hours;

[0043] (3) After grinding the obtained product, sieve it with 400 mesh to obtain the final product, which is recorded as NCA-F-0.3%-2.

Embodiment 3

[0045] (1) At room temperature, put ammonium fluoride particles and nickel-cobalt-lithium aluminate powder in an agate mortar with a mass ratio of 0.003:1, and grind for 60 minutes to make them evenly mixed;

[0046] (2) Put the ground mixture in a muffle furnace, raise the temperature to 500°C at a heating rate of 5°C / min, and keep it warm for 3 hours;

[0047] (3) After grinding the obtained product, sieve it with 400 mesh to obtain the final product. Recorded as NCA-F-0.3%-3.

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Abstract

The invention relates to the field of the battery material science, and particularly discloses a preparation method for an ammonium fluoride modified nickel-cobalt-aluminum ternary positive electrode material. The preparation method comprises the steps of putting ammonium fluoride granules and lithium nickel cobalt aluminate powder into an agate mortar at a normal temperature, and grinding and mixing uniformly; putting the grinded mixture into a muffle furnace, and performing heating, heat preservation and sintering; and after the obtained product is grinded, sieving by a 400-mesh sieve to obtain a final product. The preparation method disclosed by the invention is simple in process, convenient to operate, easy to realize large-scale production, low in energy consumption, and remarkable in energy-saving effect.

Description

[0001] (1) Technical field [0002] The invention relates to the field of battery material science, in particular to a preparation method of an ammonium fluoride-modified nickel-cobalt-aluminum ternary positive electrode material. [0003] (2) Background technology [0004] Lithium-ion batteries have the advantages of stable voltage, high capacity, high energy density, and environmental friendliness, and are widely used in electric vehicles, power tools, mobile phones, notebook computers and other fields. Cathode materials are the key materials that determine the performance of lithium-ion batteries. Cathode materials with high energy density, long cycle life and high safety have become the trend of future development. High nickel-based layered cathode materials Li(Ni x m 1-x )O 2 It has a large mass specific capacity, good rate performance and relatively low cost, making it one of the important cathodes for lithium-ion batteries. LiNi 0.8 0Co 0.15 Al 0.05 o 2 (NCA for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/525H01M4/62H01M4/628H01M10/0525Y02E60/10
Inventor 王文阁宋春华王瑛赵成龙薛嘉渔彭慧丽张恩建段丹丹
Owner SHANDONG YUHUANG NEW ENERGY TECH
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