Method for preparing nickel cobalt lithium manganate for lithium ion battery

A technology of nickel-cobalt lithium manganese oxide and lithium electronic batteries, which is applied in battery electrodes, secondary batteries, circuits, etc., and can solve problems such as difficult control of phase uniformity, inconsistent shape and size, and irregular crystal shape. , to achieve the effect of low production cost, consistent shape and structure, and uniform particle size

Inactive Publication Date: 2016-08-10
何凤英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase method has a simple process and low cost, but the particle distribution is uneven and the crystal morphology is irregular; the co-precipitation method is relatively simple, but the uniformity of the phase is not easy to control; During the process, a lot of gas and organic matter will escape, and shrinkage will occur, making the shape and size inconsistent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing lithium nickel cobalt manganese oxide in lithium electronic battery, the specific steps are as follows:

[0024] (1) Polish the aluminum foil, soak it, wash it with deionized water, heat it to 200°C in a nitrogen atmosphere, and keep it for 3 hours. The treated aluminum foil is used as the anode, the graphite rod is used as the cathode, and the calomel electrode is used as the reference electrode. 0.1 mol / L acetic acid solution is used as the electrolyte, at room temperature, under 4.5V voltage, electrochemically polished for 3 minutes, taken out, cleaned with deionized water, dried, and set aside to obtain a polished aluminum foil;

[0025] (2) Using polished aluminum foil as anode, graphite rod as cathode, calomel electrode as reference electrode, 0.2mol / L tartaric acid as electrolyte, ice-water bath, 20V voltage, electrochemical oxidation for 3h, to obtain electrochemical oxidation After the aluminum foil;

[0026] (3) Take out the electrochem...

Embodiment 2

[0032] A method for preparing lithium nickel cobalt manganese oxide in lithium electronic battery, the specific steps are as follows:

[0033] (1) Polish the aluminum foil, soak it, wash it with deionized water, heat it to 210°C in a nitrogen atmosphere, and keep it for 3.5 hours. The treated aluminum foil is used as the anode, the graphite rod is used as the cathode, and the calomel electrode is used as the reference electrode. 0.15mol / L acetic acid solution was used as the electrolyte, at room temperature, under 4.8V voltage, electrochemically polished for 3.5min, taken out, cleaned with deionized water, dried, and set aside to obtain a polished aluminum foil;

[0034] (2) With polished aluminum foil as anode, graphite rod as cathode, calomel electrode as reference electrode, 0.25mol / L phosphoric acid as electrolyte, ice-water bath, 22V voltage, electrochemical oxidation for 3.5h, to obtain electrochemical Oxidized aluminum foil;

[0035] (3) Take out the electrochemically ...

Embodiment 3

[0041] A method for preparing lithium nickel cobalt manganese oxide in lithium electronic battery, the specific steps are as follows:

[0042] (1) Polish the aluminum foil, soak it, wash it with deionized water, heat it to 220°C in a nitrogen atmosphere, and keep it for 4 hours. The treated aluminum foil is used as the anode, the graphite rod is used as the cathode, and the calomel electrode is used as the reference electrode. 0.2 mol / L acetic acid solution is the electrolyte, at room temperature, under 5V voltage, electrochemically polished for 4 minutes, taken out, cleaned with deionized water, dried, and set aside to obtain a polished aluminum foil;

[0043] (2) With polished aluminum foil as anode, graphite rod as cathode, calomel electrode as reference electrode, 0.3mol / L sulfuric acid as electrolyte, ice-water bath, 25V voltage, electrochemical oxidation for 4h, to obtain electrochemical oxidation After the aluminum foil;

[0044] (3) Take out the electrochemically oxid...

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PUM

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Abstract

The invention discloses a method for preparing nickel cobalt lithium manganate for a lithium ion battery. The method comprises the specific steps of preparing porous aluminum oxide by aluminum foils firstly; then preparing a gel-shaped substance through a lithium salt, a nickel salt, a cobalt salt and urea resin; enabling the prepared porous aluminum oxide to be soaked into the gel-shaped substance; then taking out and sintering for 8-12h; next, enabling the gel-shaped substance to be soaked in sol and re-sintering, and implementing the operation repeatedly for 3-7 times to obtain the porous aluminum oxide loaded with nickel cobalt lithium manganate; enabling the porous aluminum oxide loaded with nickel cobalt lithium manganate to be soaked in an alkali solution, filtering and then washing by water and ethyl alcohol, and next, carrying out evaporative crystallization, ball milling and screening. According to the preparation method, the elements of the nickel cobalt lithium manganate are mixed uniformly in a liquid phase environment; nickel, cobalt and manganese are complexed with ammonium and then are dispersed in resin; the cured product is also dispersed in the gel; the urea resin is low in price, so that the low preparation cost and convenient operation are realized; the porous aluminium oxide is adopted as the template; the core-forming and the growth of the nickel cobalt lithium manganate crystal nucleus can be realized in the porous aluminium oxide; and therefore, the nickel cobalt lithium manganate is uniform in grain diameter and consistent in appearance and structure.

Description

technical field [0001] The invention relates to the technical field of materials for lithium batteries, in particular to a method for preparing lithium nickel cobalt manganate in lithium electronic batteries. Background technique [0002] With the continuous development of the communication industry, electric vehicle industry and digital product industry, people's demand for batteries is increasing, and power and energy storage batteries have emerged as the times require. The country is introducing many policies to encourage the research and application of large batteries. It can be predicted that a large number of batteries will be produced in the near future. However, the battery has a certain period of service life. When the service life of the battery expires, it will enter the scrapping stage. With the current number of power batteries, it can be expected that a large number of waste batteries will be generated. Because batteries contain a large amount of precious meta...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 何凤英
Owner 何凤英
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