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Nickel cobalt lithium manganate material with trace metal impurities, preparation method and application

A technology of nickel-cobalt lithium manganese oxide and trace metals, which is applied to structural parts, electrical components, battery electrodes, etc., can solve the problems of ineffective removal of metal impurities, high energy consumption, and corrosion of equipment materials, so as to promote industrial development, The effect of simple preparation method and high safety performance

Active Publication Date: 2021-06-29
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, the material of the magnetic body is mainly stainless steel. In the process of processing materials, as the properties of the materials change, long-term use may cause corrosion to the materials of the equipment, and it is difficult to ensure the effect of removing magnetic metal impurities from the materials; The magnetic equipment generates a lot of heat and consumes a lot of energy during the working process, and the selection of the type is limited due to the characteristics of some materials; finally, the electromagnetic demagnetization equipment cannot effectively remove non-magnetic or low-magnetic metal impurities

Method used

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  • Nickel cobalt lithium manganate material with trace metal impurities, preparation method and application
  • Nickel cobalt lithium manganate material with trace metal impurities, preparation method and application
  • Nickel cobalt lithium manganate material with trace metal impurities, preparation method and application

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preparation example Construction

[0032] see figure 1 , the embodiment of the present invention provides a kind of preparation method of nickel cobalt lithium manganate material with trace metal impurity, comprising the following steps:

[0033] Step S1: providing nickel-cobalt lithium manganese oxide sintered material, said nickel-cobalt lithium manganese oxide sintered material including metal impurities;

[0034] Step S2: providing a metal chloride solution, adding ammonia water to the metal chloride solution, so that the metal chloride in the metal chloride solution and the ammonia water undergo a complex reaction to form an alkaline etching solution;

[0035] Step S3: mixing the nickel-cobalt-lithium-manganese-oxide sintered material and the alkaline etching solution, so that the alkaline etching solution etches the metal impurities in the nickel-cobalt-lithium-manganese-oxide sintered material to obtain the Nickel cobalt lithium manganese oxide material with trace metal impurities.

[0036] In step S1,...

Embodiment 1

[0067] Convert lithium carbonate to lithium salt and Ni 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 After the transition metal oxide is uniformly mixed in a ball mill mixer, the mixed material is obtained, wherein the lithium atom (Li) of lithium carbonate in the mixed material is mixed with Ni 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 The molar ratio of the total content of metal atoms (Ni, Co, and Mn) in the medium is 1.05:1; the mixed material is sintered at a temperature of 920°C, kept for 12 hours, and the sintering atmosphere is air; a jaw crusher or a roller is used The sintered sintered agglomerate is coarsely crushed by a machine, and then mechanically crushed to obtain nickel-cobalt-lithium manganese oxide material.

[0068] Prepare CuCl 2 solution, to the CuCl 2 Add ammonia water to the solution, the CuCl 2 The solution undergoes a complexation reaction with ammonia water: CuCl 2 +4NH 3 →Cu(NH 3 ) 4 Cl 2 , forming Cu(NH 3 ) 4 Cl 2 Alkaline etchant, the CuCl 2 The molar concentration ...

Embodiment 2

[0071] Different from Example 1: the transition metal oxide is Ni 0.4 co 0.3 mn 0.3 (OH) 2 ; Lithium atom of lithium carbonate and Ni 0.4 co 0.3 mn 0.3 (OH) 2 The molar ratio of the total content of metal atoms in the medium is 1.04:1; the sintering temperature is 910°C.

[0072] Prepare CrCl 3 solution, to the CrCl 3 Add ammonia water to the solution, the CrCl 3 The solution undergoes a complexation reaction with ammonia water: CrCl 3 +4NH 3 →Cr(NH 3 ) 4 Cl 3 , forming Cr(NH 3 ) 4 Cl 3 Alkaline etchant, the Cr(NH 3 ) 4 Cl 3 The molar concentration of the solution is 0.015mol / L, and the pH of the alkaline etching solution is 10.

[0073] Other steps are the same as in Example 1 and will not be repeated here.

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Abstract

A method for preparing a nickel-cobalt lithium manganese oxide material with trace metal impurities, comprising the following steps: providing a nickel-cobalt lithium manganate sintered material, the nickel-cobalt lithium manganate sintered material including metal impurities; providing a metal chloride solution, Add ammonia water to the metal chloride solution, so that the metal chloride in the metal chloride solution and the ammonia water undergo a complex reaction to form an alkaline etching solution; and mix the nickel cobalt lithium manganate sintered material and the The alkaline etching solution, so that the alkaline etching solution etches the metal impurities in the nickel-cobalt-lithium-manganese-oxide sintered material to obtain the nickel-cobalt-lithium-manganese-oxide material with trace metal impurities. The invention also provides a nickel cobalt lithium manganese oxide material with trace metal impurities and a lithium ion battery. The preparation method provided by the invention is simple and easy to operate, and can not only remove magnetic impurities, but also remove non-magnetic impurities.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery, in particular to a nickel-cobalt lithium manganese oxide material with trace metal impurities, a preparation method and an application. Background technique [0002] In the preparation process of lithium-ion battery electrode materials, metal impurities are brought in due to wear of metal equipment and raw materials. The main components of these metal impurities are copper, iron, chromium, and zinc. The crystal nuclei of iron, chromium, and zinc are large, especially the crystals grow very fast, so it is easy to form dendrites on the negative electrode, and the dendrites can easily pierce the separator, causing internal short circuit of the battery, leading to self-discharge of the battery, and even fire and explosion. Therefore, the product quality of lithium-ion battery electrode materials, especially the control of metal impurities, is the key to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525H01M4/58
CPCH01M4/485H01M4/505H01M4/525H01M4/5825H01M10/0525Y02E60/10
Inventor 王静任曾雷英魏国祯
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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