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Nickel-cobalt-lithium manganate powder of lithium battery positive electrode material and preparation method of nickel-cobalt-lithium manganate powder

A technology of nickel-cobalt lithium manganate and cathode material, which is applied to battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficulty in synthesizing nickel-cobalt lithium manganate, many reaction processes, and long reaction time, and achieves a reduced process The complexity of the operation, the simple reaction equipment, and the effect of fast heating

Inactive Publication Date: 2014-11-26
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is difficult to synthesize pure-phase nickel-cobalt-lithium manganese oxide using traditional high-temperature solid-state methods; the synthesis of nickel-cobalt-lithium manganate by co-precipitation method, common hydrothermal method and solution-gel method has many reaction processes and short reaction time. long and cumbersome

Method used

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  • Nickel-cobalt-lithium manganate powder of lithium battery positive electrode material and preparation method of nickel-cobalt-lithium manganate powder
  • Nickel-cobalt-lithium manganate powder of lithium battery positive electrode material and preparation method of nickel-cobalt-lithium manganate powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Dissolve analytically pure lithium hydroxide in deionized water to prepare a lithium hydroxide solution with a ratio of 0.1:1 between the amount of lithium hydroxide substance and the amount of deionized water substance; nickel sulfate, cobalt sulfate, manganese sulfate and permanganese Potassium acid potassium is mixed and dissolved in deionized water at a ratio of 5.5:4:2.5:2, and the preparation is called a mixed solution;

[0058] Slowly add the lithium hydroxide solution to the mixed solution at a ratio of 1:5 of the sum of the amount of nickel ions, cobalt ions and manganese ions to the amount of lithium ions, and stir evenly at 700rpm at 100°C Heating in a multi-cavity microwave oven with a power of 1500W and a temperature of 200°C for 40min, cooling naturally, filtering with a 0.05nm filter membrane, washing the filter residue with 4L of deionized water, and drying at 80°C for 1 hour to obtain nickel cobalt lithium manganese oxide powder sample.

[0059] The puri...

Embodiment 2

[0063] Dissolve analytically pure lithium hydroxide in deionized water to prepare a lithium hydroxide solution with a ratio of 0.15:1 between the amount of lithium hydroxide substance and the amount of deionized water substance; nickel sulfate, cobalt sulfate, manganese sulfate and permanganese Potassium acid potassium is mixed and dissolved in deionized water at a ratio of 4:5:2:4, and the preparation is called a mixed solution;

[0064] Slowly add the lithium hydroxide solution to the mixed solution at a ratio of 1:1 of the sum of the amount of nickel ions, cobalt ions and manganese ions to the amount of lithium ions, and stir evenly at 500rpm at 80°C Heat in a multi-cavity microwave oven with a power of 1500W and a temperature of 150°C for 60 minutes, cool naturally, filter with a 0.05nm filter membrane, wash the filter residue with 3L of deionized water, and dry at 70°C for 3 hours to obtain nickel cobalt lithium manganese oxide powder sample.

[0065] The purity of the o...

Embodiment 3

[0067] Dissolve analytically pure lithium hydroxide in deionized water to prepare a lithium hydroxide solution with a ratio of 0.13:1 between the amount of lithium hydroxide substance and the amount of deionized water substance; nickel sulfate, cobalt sulfate, manganese sulfate and permanganese Potassium acid potassium is mixed and dissolved in deionized water at a ratio of 5:6:1.5:3, and the preparation is called a mixed solution;

[0068] Slowly add the lithium hydroxide solution into the mixed solution at a ratio of 1:4 of the sum of the amount of nickel ions, cobalt ions and manganese ions to the amount of lithium ions, and stir evenly at 650rpm at 95°C Heat in a multi-cavity microwave oven with a power of 1500W and a temperature of 180°C for 32min, cool naturally, filter with a 0.05nm filter membrane, wash the filter residue with 4L of deionized water, and dry at 60°C for 4 hours to obtain nickel cobalt lithium manganese oxide powder sample.

[0069] The purity of the ob...

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Abstract

The invention discloses nickel-cobalt-lithium manganate powder of a lithium battery positive electrode material and a preparation method of the nickel-cobalt-lithium manganate powder. According to the preparation method, reaction raw materials are heated by microwaves, the reaction raw materials consume the energy of an electromagnetic field, so as to generate heat, and electromagnetic energy directly acts on medium molecules, so as to be converted into heat energy. Therefore, the nickel-cobalt-lithium manganate powder can be prepared without high-temperature heating. The preparation method of the nickel-cobalt-lithium manganate powder has the advantages of simplicity in operation and equipment, short heating time, low energy consumption, short synthesizing period, uniformity in heating reaction and easiness in obtaining.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a nickel-cobalt-lithium-manganese oxide powder and a preparation method thereof. Background technique [0002] Lithium-ion battery is a new type of green and environment-friendly power supply, which has the advantages of high energy density and high discharge platform, and is widely used in electronic products such as mobile phones, cameras, and notebook computers. With the continuous development of the digital product industry, people's demand for batteries is increasing. [0003] The positive electrode material of lithium battery is an important part of lithium battery and the main factor affecting the performance of lithium battery. The current commercial positive electrode materials mainly include lithium cobalt oxide, lithium manganese oxide, lithium nickel cobalt manganese oxide and lithium iron phosphate. In recent years, due to the low price of nickel-cobalt lithium ...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 苗峰
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES