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A method for synthesizing lithium ion battery cathode material nickel cobalt lithium manganese oxide by template method

A technology for nickel-cobalt lithium manganese oxide and lithium-ion batteries, which is applied in the field of template synthesis of lithium-ion battery positive electrode material nickel-cobalt lithium manganese oxide, can solve the problems of unfavorable lithium ion diffusion, and achieve the advantages of intercalation and extraction, and reduce the preparation steps , reduce the effect of agglomeration

Active Publication Date: 2016-10-05
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned published patents can produce spherical nickel-cobalt-manganese hydroxide precursors, they do not control the surface morphology of the spherical precursor, which is not conducive to the diffusion of lithium ions during the sintering process.

Method used

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  • A method for synthesizing lithium ion battery cathode material nickel cobalt lithium manganese oxide by template method
  • A method for synthesizing lithium ion battery cathode material nickel cobalt lithium manganese oxide by template method
  • A method for synthesizing lithium ion battery cathode material nickel cobalt lithium manganese oxide by template method

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preparation example Construction

[0037] The present invention as figure 1 , 2 , Shown in 3, 4, a kind of template synthesis method of lithium ion battery cathode material nickel cobalt manganese oxide lithium, it is characterized in that: concrete steps are as follows:

[0038] (1) Dissolve lithium salt, nickel salt, cobalt salt, and manganese salt in water-organic solvent in molar ratio to form a metal solution. The molar ratio of lithium to nickel, cobalt, and manganese is 1.1:1 / 3:1 / 3: 1 / 3, the total molar concentration of lithium, nickel, cobalt, and manganese ions is 3-4mol / L, and in the water-organic solvent mixture, the mass ratio of water to the mixture is 10-40wt%;

[0039] (2) Prepare a mixed aqueous solution of ammonia water, ammonium carbonate and polyethylene glycol, the concentration of ammonia water is 0.5-2mol / L, and the concentration of ammonium carbonate is 3-5 mol / L;

[0040] (3) Add the solution in (1) to silica molecular sieve, add the mixed aqueous solution in step (2) dropwise into the...

Embodiment 1

[0049] (1) Configure a mixed solution of lithium hydroxide, nickel sulfate, cobalt sulfate, and manganese sulfate. The molar ratio of lithium hydroxide, nickel sulfate, cobalt sulfate, and manganese sulfate is 1.1:1 / 3:1 / 3:1 / 3. The total concentration of nickel sulfate, cobalt sulfate and manganese sulfate in the mixed solution is 2mol / L, the solvent is a water-ethanol mixture, and the mass percentage of water is 20%;

[0050] (2) Prepare a mixed aqueous solution of ammonia, ammonium carbonate and polyethylene glycol, the concentration of ammonia is 1mol / L, the concentration of ammonium carbonate is 4mol / L, and polyethylene glycol accounts for 3% of the total mass of the mixed lye;

[0051] (3) Add a certain quality of SBA-15 molecular sieve to the solution in (1), and drop the mixed aqueous solution in step (2) into the solution under mechanical stirring conditions, so that the metal solution, SBA-15 and mixed lye are fully Mix and mechanically stir for 10 hours to obtain the...

Embodiment 2

[0057] (1) Configure a mixed solution of lithium hydroxide, nickel sulfate, cobalt sulfate, and manganese sulfate. The molar ratio of lithium hydroxide, nickel sulfate, cobalt sulfate, and manganese sulfate is 1.1:1 / 3:1 / 3:1 / 3. The total concentration of nickel sulfate, cobalt sulfate and manganese sulfate in the mixed solution is 2mol / L, the solvent is a water-ethanol mixture, and the mass percentage of water is 40%;

[0058] (2) Prepare a mixed aqueous solution of ammonia water, ammonium carbonate and polyethylene glycol, the concentration of ammonia water is 1mol / L, the concentration of ammonium carbonate is 4mol / L, and polyethylene glycol accounts for 5% of the total mass of the mixed lye;

[0059] (3) Add a certain quality of SBA-15 molecular sieve to the solution in (1), and add the mixed aqueous solution in step (2) dropwise to the solution under mechanical stirring conditions, so that the metal solution, SBA-15 and mixed lye are fully Mix and mechanically stir for 10 h...

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Abstract

A method for synthesizing lithium nickel cobalt manganese oxide used as an anode material for a lithium ion battery comprises the following specific steps: (1) lithium salt, nickel salt, cobalt salt and manganese salt are dissolved in water-organic solvent in a mole ratio to form a metallic solution, the mole ratio of lithium to nickel to cobalt to manganese is 1.1 to 1 / 3 to 1 / 3 to 1 / 3, and the mass ratio of water to the mixture is 10-40wt%; (2) a mixed aqueous solution of ammonia water, ammonium carbonate and polyethylene glycol is prepared; (3) a silicon dioxide molecular sieve is added into the solution obtained in the step (1), the mixed aqueous solution obtained in the step (2) is dripped into the solution under the condition of mechanical agitation, so that a precursor precipitate is obtained; (4) the precursor precipitate obtained in step (3) is washed and dried, so that a lithium nickel cobalt manganese oxide-SBA-15 material is obtained; (5) the lithium nickel cobalt manganese oxide-SBA-15 material prepared in the step (4) is agitated and washed, an SBA-template is removed, and thus the template-free lithium nickel cobalt manganese oxide material is obtained.

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 method for synthesizing nickel-cobalt lithium manganese oxide, a positive electrode material of a lithium ion battery, by a template method. Background technique [0002] Lithium-ion batteries have the advantages of high energy, long life, no memory effect and low pollution, and are widely used in mobile phones, computers, digital products, instruments, power tools, electric bicycles, electric vehicles, national defense and other fields. At present, the positive electrode materials used in lithium-ion batteries mainly include lithium cobalt oxide, lithium iron phosphate, lithium manganese oxide and lithium nickel cobalt manganese oxide. Due to the excellent safety performance of lithium iron phosphate, it is the first choice for power batteries such as electric buses. Cathode material; besides good safety performance, lithium mang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/58
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 关成善宗继月孟博王晓卫
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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