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Metal fluoride coating ternary material and preparation method thereof

A ternary material and fluoride technology, applied in nanotechnology, electrical components, electrochemical generators, etc. for materials and surface science, can solve problems such as insufficient coating uniformity, and achieve simple and efficient preparation methods. The effect of low anti-corrosion requirements, improved cycle performance and storage performance

Active Publication Date: 2018-06-29
SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there are certain defects in these treatment processes, such as the possibility of generating strong corrosive HF gas, or the use of fluorine-containing reagents that are easily decomposed to produce hydrogen fluoride, or the uniformity of the coating is not good enough

Method used

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  • Metal fluoride coating ternary material and preparation method thereof
  • Metal fluoride coating ternary material and preparation method thereof
  • Metal fluoride coating ternary material and preparation method thereof

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preparation example Construction

[0035] The embodiment of the present invention proposes a method for preparing a metal fluoride-coated ternary material, including:

[0036] adding the ternary material into the ball milling equipment, the ball milling equipment including ball milling beads, the inner wall of the ball milling equipment and / or the ball milling beads are attached with metal fluoride, the ball milling is performed at a second rotational speed, and the milling time is the second time length;

[0037] The above operation is repeated many times, so that the ternary material contains 0.1-0.5% by weight of metal fluoride.

[0038] In this embodiment, a certain quality of ternary cathode material is put into a ball milling equipment that has ball-milled metal fluoride, and the ball mill is turned on at the second rotation speed. After the second time of ball milling, a small amount of metal fluoride coating can be obtained. ternary material. The general formula of the above-mentioned ternary cathode m...

Embodiment 1

[0054] Step 1. Put 18g of aluminum fluoride into the ball milling equipment. For example, QM3-SP4 planetary ball mill can be used. The lining of the ball mill is made of ceramic material for metal isolation treatment, and ball milling beads made of zirconia are used. The ball milling beads are 5mm and 1mm Two particle sizes, the mass ratio of ball milling beads for large and small particle sizes is 1:1, and the ball-to-material ratio is controlled at 10:1. At the ball mill speed of 600 rpm, ball milling for 25 minutes, so that the surface of the ball milling beads and the inner surface of the ball milling equipment adhere to a Layer metal fluoride, and separate the remaining metal fluoride powder and ball milling beads by sieving. After separation, the ball milling beads are returned to the ball milling tank for use in the next process.

[0055] Step 2, add a certain mass of ternary cathode material (LiNi 0.84 co 0.1 mn 0.06 o 2 ) into the ball milling equipment that ball m...

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Abstract

The invention provides a metal fluoride coating ternary material and a preparation method thereof. The metal fluoride coating ternary material is formed by combining a ternary material and a metal fluoride in a mode of ball milling for many times. According to the preparation method, metal fluoride coating is avoided from being performed by adopting a wet method process, a fluoride precipitant does not need to be used, corrosion cannot be caused to an anode material, and the anti-corrosion requirement for equipment is relatively low. By adopting the preparation method of the metal fluoride coating ternary material, coating of a ternary anode material with nanoscale metal fluoride particles can be realized. The preparation method is simple and efficient, has operability and is suitable forlarge-scale industrial production. The acquired metal fluoride coating ternary material improves the cycle performance and the storage performance of the anode material.

Description

technical field [0001] The invention relates to the field of lithium battery materials, in particular to a metal fluoride-coated ternary material and a preparation method thereof. Background technique [0002] Lithium-ion power batteries are the core components of new energy vehicles, and their performance is directly related to the smooth promotion of new energy vehicles and the future of the new energy vehicle industry. The vast new energy vehicle market can also drive the vigorous development of the lithium-ion battery industry. [0003] Cathode material is an important part of lithium-ion batteries, and its performance is crucial to the performance of lithium-ion batteries. Among various positive electrode materials, ternary positive electrode materials have become the preferred positive electrode materials for lithium-ion power batteries for new energy vehicles (especially passenger vehicles) due to their high energy density, and have also become the development focus ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/505H01M4/525H01M4/628H01M10/0525Y02E60/10
Inventor 陈巍欧阳云鹏李鲲张耀
Owner SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
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