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Preparation method of lithium nickel cobalt manganese oxide precursor

A technology of nickel-cobalt lithium manganate and precursor is applied in the field of preparation of nickel-cobalt lithium manganate material precursor, which can solve the problems of low material capacity and poor material cycle performance, and achieve uniform particle size distribution, good processing performance, The effect of excellent electrochemical performance

Inactive Publication Date: 2013-11-27
ZHUJI PAWA NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of high tap density, good sphericity, which can overcome the existing single LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The material capacity is low, a single LiNi 0.5 co 0.2 mn 0.3 o 2 Preparation method of nickel cobalt lithium manganese oxide material precursor with poor material cycle performance

Method used

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  • Preparation method of lithium nickel cobalt manganese oxide precursor
  • Preparation method of lithium nickel cobalt manganese oxide precursor
  • Preparation method of lithium nickel cobalt manganese oxide precursor

Examples

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Embodiment 1

[0023] This embodiment includes the following steps:

[0024] (1) Add 100mL of the mixed aqueous solution of nickel, cobalt and manganese sulfate into the synthesis reaction kettle with an ultrasonic device at 5mL / min through a metering pump, keep the stirring speed at 1000r / min, and pass argon to make the synthesis environment Carried out under anaerobic conditions, while continuously adding 200 mL of sodium hydroxide solution with a concentration of 10 mol / L and 100 mL of ammonia solution with a concentration of 5 mol / L at a rate of 5 mL / min to stabilize the pH of the solution at 11.5, filter and After ultrasonic washing, Ni 0.5 co 0.2 mn 0.3 (OH) 2 slurry;

[0025] The mixed aqueous metal ion total concentration of described nickel, cobalt, manganese sulfate is 1mol / L, and wherein, the mol ratio of nickel ion, manganese ion and cobalt ion is 5:3:2;

[0026] (2) Put the slurry obtained in step (1) into the stirred reactor, control the stirring speed to 200r / min, and the...

Embodiment 2

[0033] This embodiment includes the following steps:

[0034] (1) Add 200mL of the mixed aqueous solution of nickel, cobalt and manganese sulfate into the synthesis reaction kettle with ultrasonic device at 2mL / min through the metering pump, keep the stirring speed at 1000r / min, and pass nitrogen to make the synthesis environment in Under anaerobic conditions, at the same time continuously add 150mL of calcium hydroxide solution with a concentration of 10mol / L and 100mL of ammonium bicarbonate solution with a concentration of 5mol / L at a rate of 5mL / min to stabilize the pH of the solution at 10, and filter and after ultrasonic washing, Ni 0.5 co 0.2 mn 0.3 (OH) 2 slurry;

[0035] The mixed aqueous metal ion total concentration of the sulfate of described nickel, cobalt and manganese is 0.5mol / L, and wherein, nickel ion, manganese ion and cobalt ion mol ratio are 5:3:2;

[0036] (2) Put the slurry obtained in step (1) into the stirred reactor, control the stirring speed to...

Embodiment 3

[0043] This embodiment includes the following steps:

[0044] (1) Add 50mL of the mixed aqueous solution of nickel, cobalt and manganese sulfate into the synthesis reaction kettle with an ultrasonic device at 10mL / min through a metering pump, keep the stirring speed at 1000r / min, and pass argon to make the synthesis environment Carry out under anaerobic conditions, and at the same time continuously add 280mL of potassium hydroxide solution with a concentration of 10mol / L and 100mL of ammonium carbonate solution with a concentration of 5mol / L at a rate of 5mL / min to stabilize the pH of the solution at 14, and filter and after ultrasonic washing, Ni 0.5 co 0.2 mn 0.3 (OH) 2 slurry;

[0045] The mixed aqueous metal ion total concentration of the sulfate of described nickel, cobalt and manganese is 2mol / L, and wherein, nickel ion, manganese ion and cobalt ion mol ratio are 5:3:2;

[0046] (2) Add the slurry obtained in step (1) into the stirring reaction kettle, control the s...

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Abstract

The invention provides a preparation method of a lithium nickel cobalt manganese oxide precursor. The preparation method of the lithium nickel cobalt manganese oxide precursor comprises the following steps of: (1) adding a mixed aqueous solution of sulphate into a synthesis reaction kettle provided with an ultrasonic device, introducing shielding gas, and adding an alkali precipitator and a metal complexing agent which are enough for precipitating metal ions and are capable of adjusting and stabilizing the pH value of the solution to 10-14, and carrying out filtering and ultrasonic washing to obtain slurry, wherein the mole ratio of nickel ion to manganese ion to cobalt ion in the mixed aqueous solution of sulphate is 5:3:2; (2) adding the slurry into a stirring reaction kettle, adding a mixed aqueous solution of sulphate in which the mole ratio of nickel ion to manganese ion to cobalt ion is 1:1:1, introducing shielding gas, and adding an alkali precipitator and a metal complexing agent which are enough for precipitating metal ions and are capable of adjusting and stabilizing the pH value of the solution to 10-14, washing precipitate, and carrying out vacuum drying; (3) sintering. A lithium nickel cobalt manganese oxide material prepared by the lithium nickel cobalt manganese oxide material precursor has high tap density, good processability and excellent electrochemical properties.

Description

technical field [0001] The invention relates to a preparation method of a nickel cobalt lithium manganese oxide material precursor, in particular to a nickel cobalt lithium manganate material precursor Ni 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 -Ni 0.5 co 0.2 mn 0.3 (OH) 2 Preparation method of solid solution. Background technique [0002] Lithium-ion battery cathode material is the most critical part of the battery. The current lithium-ion battery cathode materials on the market mainly include lithium cobaltate, lithium manganate, lithium ferrous phosphate and nickel-cobalt-manganese ternary system. Among them, lithium cobaltate, lithium iron phosphate and nickel-cobalt-manganese ternary system are the mainstream materials. Due to the severe scarcity of cobalt resources, high price, and potential safety hazards during overcharging, the application of lithium cobalt oxide in large-capacity batteries is greatly restricted. Although the layered lithium manganese oxide has 200 mAh·g ...

Claims

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Application Information

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IPC IPC(8): H01M4/48
CPCY02E60/12Y02E60/10
Inventor 张宝张佳峰彭春丽郑俊超
Owner ZHUJI PAWA NEW ENERGY