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Method for preparing nickel cobalt lithium manganese

A technology for nickel-cobalt lithium manganate and lithium cobalt manganate is applied in the field of preparing nickel-cobalt lithium manganate, which can solve the problems of irregular crystal morphology, low cost, uneven particle distribution, etc., and achieve high consistency of morphology and structure. , Consistent morphology and structure, uniform particle size

Inactive Publication Date: 2015-01-28
QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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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

[0035] A method for preparing lithium nickel cobalt manganese oxide, comprising the following steps:

[0036] (1) first prepare porous alumina;

[0037] (2) Dissolve nickel source, cobalt source, manganese source and lithium source in water at a molar ratio of 1.1:1.1:1.1:1, then add ethylene glycol to the aqueous solution, mix well, and heat and evaporate at 73°C , forming a sol;

[0038] (3) Soak the porous alumina obtained in step (1) in the sol of step (2), take it out, sinter at 820°C for 9 hours, then immerse in the sol, and sinter again, and repeat this 6 times to obtain loaded nickel-cobalt manganic acid lithium porous alumina;

[0039] (4) Immerse the porous alumina loaded with nickel-cobalt-lithium manganese oxide in a 6mol / L alkaline solution for 65 minutes; (5) after filtering, wash with water and ethanol, evaporate and crystallize, and then ball mill and sieve to obtain nickel-cobalt lithium manganate product .

[0040] The preparation of porous alumina descri...

Embodiment 2

[0058] A method for preparing lithium nickel cobalt manganese oxide, comprising the following steps:

[0059] (1) first prepare porous alumina;

[0060] (2) Dissolve nickel source, cobalt source, manganese source and lithium source in water at a molar ratio of 1.3:1.3:1.3:1, then add ethylene glycol to the aqueous solution, mix well, and heat and evaporate at 78°C , forming a sol;

[0061] (3) Soak the porous alumina obtained in step (1) in the sol of step (2), take it out, sinter at 850°C for 10 hours, then immerse in the sol, and sinter again, and repeat this 8 times to obtain loaded nickel-cobalt manganic acid lithium porous alumina;

[0062] (4) Immerse the porous alumina loaded with nickel-cobalt-lithium manganese oxide in 8mol / L alkaline solution for 70min; (5) after filtering, wash with water and ethanol, evaporate and crystallize, then ball mill and sieve to obtain nickel-cobalt lithium manganate product .

[0063] The preparation of porous alumina described in ste...

Embodiment 3

[0081] A method for preparing lithium nickel cobalt manganese oxide, comprising the following steps:

[0082] (1) first prepare porous alumina;

[0083] (2) Dissolve nickel source, cobalt source, manganese source and lithium source in water at a molar ratio of 1.2:1.2:1.2:1, then add ethylene glycol to the aqueous solution, mix well, and heat and evaporate at 75°C , forming a sol;

[0084] (3) Soak the porous alumina obtained in step (1) in the sol of step (2), take it out, sinter at 830°C for 9 hours, then immerse in the sol, and sinter again, and repeat this 7 times to obtain loaded nickel-cobalt manganic acid lithium porous alumina;

[0085] (4) Immerse the porous alumina loaded with nickel-cobalt-lithium manganese oxide in a 7mol / L alkaline solution for 67 minutes; (5) after filtering, wash with water and ethanol, evaporate and crystallize, and then ball mill and sieve to obtain nickel-cobalt lithium manganate product .

[0086] The preparation of porous alumina descri...

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Abstract

The invention relates to the field of nickel cobalt lithium manganate material, especially a method for preparing a nickel cobalt lithium manganese. The method comprises the following steps: (1) first preparing porous alumina; (2) dissolving the nickel source, cobalt source, manganese source and lithium source according to molar ratio of (1.1-1.3):(1.1-1.3):(1.1-1.3) in water, then adding glycol into water, mixing evenly, heating for evaporation at 73-78 DEG C to form a sol; (3) immersing the porous alumina obtained in the step (1) in the sol obtained in the step (2), taking out the porous alumina, sintering at 820-850 DEG C for 9-10 h, then immersing the porous alumina in the sol, sintering and repeating for 6-8 times to obtain the nickel cobalt lithium manganese supported porous alumina; and (4) immersing the nickel cobalt lithium manganese supported porous alumina in 6-8 mol / L alkaline solution for 65-70min; and (5) filtering, cleaning with water and ethanol, evaporating for crystallization, conducting ball milling and sieving to obtain the nickel cobalt lithium manganese product. The invention has the advanategs of uniform particle size and consistent morphology structure of nickel cobalt lithium manganese.

Description

technical field [0001] The invention relates to the field of nickel-cobalt lithium manganese oxide materials, in particular to a method for preparing nickel-cobalt lithium manganese oxide. 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. Lithium nickel cobalt manganese oxide is an important cathode material for lithium batteries, which is increasingly widely produced and used, and has a large market demand. [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 incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/0525H01M2220/20Y02E60/10
Inventor 孙琦李岩孙慧英
Owner QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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