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Preparation method of ternary single crystal material

A single crystal material, ternary material technology, applied in the direction of polycrystalline material growth, single crystal growth, single crystal growth, etc., can solve the problem of long sintering cycle, ternary material dust collection material can not be resource utilization, complex preparation process, etc. question

Inactive Publication Date: 2021-09-14
HUBEI RT ADVANCED MATERIALS CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of poor electrochemical properties of ternary materials, complex preparation process, long sintering cycle, poor single crystal form of materials, and inability of resource utilization of ternary materials to collect dust existing in the prior art, and to provide a A kind of preparation method of ternary single crystal material

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  • Preparation method of ternary single crystal material

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preparation example Construction

[0034] The invention provides a method for preparing a ternary single crystal material, the method comprising the following steps:

[0035] (1) Mix the ternary 523 single crystal precursor, lithium source, zirconia, and ternary material with a D50 of 1-3 μm to pulverize and collect dust to obtain a mixture;

[0036] (2) sintering the mixture obtained in step (1) to obtain a ternary single crystal material;

[0037] Wherein, in step (1), the ratio of the amount of the lithium element in the lithium source to the total amount of the three elements of nickel, cobalt and manganese in the ternary 523 single crystal precursor is (1-1.06):1 ; The mixed material contains 5-15% by weight of ternary material pulverized dust collector and 0.15-0.25% by weight of zirconium element.

[0038] In the present invention, the chemical formula of the ternary 523 single crystal precursor used is Ni 0.5 co 0.2 mn 0.3 (OH) 2 .

[0039]In the present invention, in a preferred embodiment, the t...

Embodiment 1

[0058] (1) The ternary 523 single crystal precursor, lithium carbonate, zirconia, and ternary polycrystalline material (the Dmin of the ternary polycrystalline material precursor is 0.79 μm) are pulverized and mixed in a high mixer to obtain Mixture; wherein, the ratio of lithium element in lithium carbonate to the total amount of the three elements of nickel, cobalt and manganese in the ternary 523 single crystal precursor is 1.06:1, and the mixture contains 0.2% by weight of zirconium and 5% by weight % of ternary polycrystalline pulverized dust-collecting material; wherein, the preparation process of ternary polycrystalline pulverized dust-collected material is as follows: the ternary polycrystalline material is pulverized through a mechanical mill, the classification frequency is in the range of 10-30Hz, and the classification wheel , the materials with qualified particle size are collected by the cyclone collector, and the fine dust is collected by the bag filter. When a ...

Embodiment 2

[0061] (1) Mix the ternary 523 single crystal precursor, lithium carbonate, zirconia and ternary single crystal material dust collection material in a high mixer to obtain a mixture; wherein, the lithium element in lithium carbonate and the ternary The ratio of the total amount of the three elements of nickel, cobalt and manganese in the 523 single crystal precursor is 1.02:1, and the mixture contains 0.2% by weight of zirconium element and 10% by weight of ternary single crystal dust collector. After ICP test, The chemical formula of ternary single crystal dust collector is Li 1.012 (Ni 0.497 co 0.196 mn 0.289 )O 2 ; Among them, the SEM picture of the ternary single crystal material pulverized dust collection material is as follows figure 2 As shown, Dmin is 0.17 μm, D10 is 1.167 μm, D50 is 2.704 μm, D90 is 5.481 μm, and Dmax is 11.39 μm. Combining with SEM, it can be seen that the crushed dust collection material of the ternary single crystal material is mainly fine pow...

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Abstract

The invention relates to the technical field of lithium ion batteries, and discloses a preparation method of a ternary single crystal material. The method comprises the steps of (1) mixing a ternary 523 single crystal precursor, a lithium source, zirconium oxide and a ternary material crushing dust collection material with D50 of 1-3 [mu] m to obtain a mixture; and (2) sintering the mixture obtained in the step (1) to obtain the ternary single crystal material. According to the method, the ternary material dust collection material is introduced into the preparation process of the ternary single crystal material as a seed crystal, so that the dust collection material can be recycled, and the purposes of green circulating production, capacity increase and yield increase are achieved; and due to the introduction of the seed crystal, the sintering period can be shortened in the solid-phase sintering process, the production efficiency is improved, and the ternary single crystal material with good electrochemical performance can be obtained.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a ternary single crystal material. Background technique [0002] my country's lithium and cobalt resources are scarce, and more than 70% of lithium and more than 90% of cobalt need to be imported. Therefore, how to make full use of unqualified materials in the process of ternary materials to maximize their performance and obtain cathode materials with better electrochemical performance is one of the current research directions that need to be developed urgently. [0003] Patent application CN201811075697.3 discloses a method for preparing cobalt trioxide with large particle size. In this method, a certain concentration of cobalt solution is used as the cobalt source, sodium hydroxide solution is used as the precipitant, ammonia solution is used as the complexing agent, and hydrazine hydrate solution is used as the reducing agent. At the begi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B1/02C30B1/10C30B29/22H01M4/505H01M4/525H01M10/0525
CPCC30B1/10C30B1/02C30B29/22H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 何雅梅京姚远徐成孙杰
Owner HUBEI RT ADVANCED MATERIALS CO LTD
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