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A method for removing magnetic substances in positive electrode materials of lithium batteries and a detection method

A technology of magnetic material and positive electrode material, applied in battery electrodes, active material electrodes, positive electrodes, etc., can solve the problem of high magnetic impurity content, and achieve the effect of improving performance and reducing production costs

Active Publication Date: 2021-04-20
QINGDAO LNCM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for removing and detecting magnetic substances in positive electrode materials of lithium batteries, so as to solve the problem of high content of magnetic impurities in current positive electrode materials

Method used

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  • A method for removing magnetic substances in positive electrode materials of lithium batteries and a detection method
  • A method for removing magnetic substances in positive electrode materials of lithium batteries and a detection method

Examples

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Effect test

Embodiment 1

[0028] A method for removing magnetic substances in positive electrode materials of lithium batteries, using hydrogen peroxide solution to process lithium

[0029] Battery positive electrode material nickel cobalt lithium manganese oxide to remove the magnetic substance in nickel cobalt lithium manganese oxide; hydrogen peroxide solution is used to wash the lithium battery positive electrode material containing magnetic substance, after the hydrogen peroxide solution washing treatment, the magnetic substance and The hydrogen oxide solution reacts in an alkaline environment at normal temperature to form a non-magnetic hydroxide; the washed positive electrode material is dried at a temperature of 300°C for 3 hours, and the formed hydroxide is heated Generate oxides, hydrogen peroxide decomposes into oxygen and water vapor, oxygen reacts with the positive electrode material, further enhancing the integrity of the material structure, a very small amount of magnetic substances in th...

Embodiment 2

[0045]A method for removing magnetic substances in lithium battery positive electrode materials, using hydrogen peroxide solution to treat lithium battery positive electrode material nickel-cobalt-aluminate lithium to remove the magnetic substances in nickel-cobalt-aluminate lithium; using hydrogen peroxide solution to contain magnetic substances The positive electrode material of lithium battery is washed, and after being washed with hydrogen peroxide solution, the magnetic substance and hydrogen peroxide solution react in an alkaline environment at normal temperature to form a non-magnetic hydroxide; the washed positive electrode material is The temperature is 500°C, and the drying time is 6 hours. The formed hydroxide is heated to form an oxide, and the hydrogen peroxide is decomposed into oxygen and water vapor. The oxygen reacts with the positive electrode material, which further enhances the integrity of the material structure. A very small amount of magnetic substances t...

Embodiment 3

[0062] A method for removing magnetic substances in positive electrode materials of lithium batteries, using hydrogen peroxide solution to process lithium

[0063] Battery positive electrode material lithium manganate to remove the magnetic substance in lithium manganate; hydrogen peroxide solution is used to wash the lithium battery positive electrode material containing magnetic substance, after the hydrogen peroxide solution washing treatment, the magnetic substance and hydrogen peroxide solution Reaction in an alkaline environment at room temperature produces a non-magnetic hydroxide; the washed positive electrode material is dried at a temperature of 400°C for 4.5 hours, and the formed hydroxide forms an oxide under heating , hydrogen peroxide decomposes into oxygen and water vapor, and the oxygen reacts with the positive electrode material, which further enhances the integrity of the material structure, and a very small amount of magnetic substances in the material that h...

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Abstract

The invention belongs to the technical field of lithium battery materials, and in particular relates to a method for removing magnetic substances in positive electrode materials of lithium batteries and a detection method, which comprises washing the positive electrode materials of lithium batteries containing magnetic substances with hydrogen peroxide solution, and passing through hydrogen peroxide solution After washing, the magnetic substance and the hydrogen peroxide solution react in an alkaline environment at normal temperature to form a non-magnetic hydroxide. The washed positive electrode material is heated and dried; then the magnetic substance is washed and extracted to detect the positive electrode of the lithium battery. The amount of magnetic particles in the material. Through the above-mentioned technical solution, it is possible to obtain positive electrode materials with low magnetic impurities through simple processing, thereby improving the performance of positive electrode materials, reducing production costs, and facilitating the promotion of new energy batteries in the future.

Description

technical field [0001] The invention belongs to the technical field of lithium battery materials, and in particular relates to a method for removing magnetic substances in positive electrode materials of lithium batteries and a detection method. Background technique [0002] New energy vehicles are the direction of future vehicle development, and power batteries are an important part of new energy vehicles that differ from traditional fuel vehicles. At present, there are two main types of lithium-ion batteries used in the field of new energy vehicles: one is lithium iron phosphate (LFP) battery with positive electrode material, and the other is ternary material battery. Due to the insufficient energy density of lithium iron phosphate, it has gradually been unable to meet the needs of social development; and the high voltage and high energy density of ternary batteries are expected to meet people's needs. [0003] At present, although the battery design and management system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C1/02G01N15/14H01M4/139H01M10/0525H01M4/02
CPCB03C1/02G01N15/14G01N2015/1486H01M4/139H01M10/0525H01M2004/028Y02E60/10
Inventor 孙玉城
Owner QINGDAO LNCM