A kind of preparation method of spherical nickel-manganese binary material

A binary material, nickel-manganese technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of inability to meet the requirements at the same time, high nickel price, inability to meet the price, etc., to achieve easy control of reaction, long cycle life, high voltage Effect

Inactive Publication Date: 2016-03-30
ANHUI ALAND NEW ENERGY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing lithium-ion battery materials cannot meet the above properties at the same time, only lithium nickelate can meet most of the above requirements
Due to the relatively high price of nickel, people's demand for low price cannot be met

Method used

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  • A kind of preparation method of spherical nickel-manganese binary material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ①. Use pure water as the bottom liquid, set the temperature at 60°C, control the stirring speed at 145-155r / min, add 10% ammonia water (volume percentage, the same below) and a concentration of 20% (weight percentage , the same below) with sodium hydroxide solution to adjust the alkalinity of the bottom liquid to 30g / l, and the pH value to be 10.5-11.0.

[0023] ②. Dissolve nickel sulfate and manganese chloride at a molar ratio of 4:1 to form a mixed aqueous solution. After mixing evenly, the total metal ion concentration is controlled to 1mol / l.

[0024] Then pump 20% sodium hydroxide solution, 10% ammonia water and mixed aqueous solution into the bottom liquid continuously and concurrently, and a precipitation reaction occurs at 60°C. The stirring speed is controlled at 145-155r / min, and the alkali The density is 28-32g / l, the pH value is 10.5-11.0, and the solid content of the slurry is 140-160g / l.

[0025] The reactants produce crystal nuclei, and the crystal nucle...

Embodiment 2

[0029] ①. Use pure water as the bottom liquid, set the temperature at 70°C, control the stirring speed at 195-205r / min, add 15% ammonium salt solution (weight percentage, the same below) and 25% hydrogen hydroxide The sodium solution adjusts the alkalinity of the bottom solution to 35g / l, and the pH value is 11.0-11.5.

[0030] ②. Dissolve nickel nitrate and manganese sulfate at a molar ratio of 7:3 to form a mixed aqueous solution. After mixing evenly, the total metal ion concentration is controlled to 1.5mol / l.

[0031] Then pump 25% sodium hydroxide solution, 15% ammonium salt solution and mixed aqueous solution into the bottom liquid continuously and concurrently, and a precipitation reaction occurs at 70°C. Control the stirring speed at 195-205r / min, and control the reaction system The alkalinity is 33-37g / l, the pH value is 11.0-11.5, and the solid content of slurry is 190-210g / l.

[0032] The reactants produce crystal nuclei, and the crystal nuclei grow into spherical ...

Embodiment 3

[0035] ①. Use pure water as the bottom liquid, set the temperature at 75°C, control the stirring speed at 235-245r / min, add 15% ammonium salt solution and 25% sodium hydroxide solution to adjust the alkalinity of the bottom liquid to 40g / l, the pH value is 11.2-11.7.

[0036] ②. Dissolve nickel nitrate and manganese chloride in a molar ratio of 3:2 to form a mixed aqueous solution. After mixing evenly, the total metal ion concentration is controlled to 1.5mol / l.

[0037] Then pump 25% sodium hydroxide solution, 15% ammonium salt solution and mixed aqueous solution into the bottom liquid continuously and concurrently, and a precipitation reaction occurs at 75°C. The stirring speed is controlled at 235-245r / min to control the reaction system. The alkalinity is 38-42g / l, the pH value is 11.2-11.7, and the solid content of slurry is 235-245g / l.

[0038] The reactants produce crystal nuclei, and the crystal nuclei grow into spherical particles. The reaction feed liquid continuous...

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Abstract

The invention relates to the field of lithium-ion battery materials, in particular to a preparation method of a spherical nickel-manganese binary material. The sodium hydroxide solution, the complexing agent solution, the mixed aqueous solution of nickel salt and manganese salt are pumped continuously and concurrently into the bottom liquid, and a precipitation reaction occurs, and the stirring speed, the alkalinity and pH value of the reaction system are controlled to make the reactants Crystal nuclei are generated, and the crystal nuclei grow into spherical particles. The reaction feed liquid continuously flows out from the upper overflow port of the reaction kettle into the aging kettle, and is washed and dried to obtain spherical nickel-manganese hydroxide; spherical nickel-manganese hydroxide and lithium source Mix evenly, calcinate at high temperature under the condition of passing oxygen, and then grind to obtain spherical nickel-manganese binary material. It has high voltage, good sphericity, high tap density, long cycle life and good safety performance. In addition, it has low requirements for synthesis equipment, simple process flow, easy control of reaction, high production efficiency, relatively simple sintering process, suitable for continuous industrial production, and has broad development prospects and great market potential.

Description

technical field [0001] The invention relates to the field of lithium-ion battery materials, in particular to a preparation method of a spherical nickel-manganese binary material. Background technique [0002] Since batteries made of layered lithium cobaltate as positive electrode materials were put into the market, lithium-ion batteries have shown increasing importance in various fields, and battery materials have developed rapidly, and lithium-ion battery materials with various characteristics have emerged one after another. Such as lithium manganese oxide, lithium nickel oxide, lithium nickel cobalt oxide, lithium iron phosphate, nickel cobalt manganese ternary materials, etc. People's requirements for lithium-ion batteries are also getting higher and higher, and people need to use lithium-ion batteries with low price, smaller size, longer cycle life and lighter weight. At present, the existing lithium-ion battery materials cannot meet the above properties at the same tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 孙朝军孙卫华李世辉
Owner ANHUI ALAND NEW ENERGY MATERIALS
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