Method for preparing spherical carbonate ternary precursor

A carbonate and precursor technology, which is applied in the field of preparation of spherical carbonate ternary precursors, can solve problems such as poor fluidity of sphericity, low production efficiency, and inability to continue production, and achieve good sphericity, Simplified production control, uniform particle effect

Inactive Publication Date: 2011-05-25
ANHUI ALAND NEW ENERGY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the particles are relatively uneven, and the fluidity of the sphericity is not good, and it cannot be continuously produced, and the production efficiency is not high

Method used

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  • Method for preparing spherical carbonate ternary precursor
  • Method for preparing spherical carbonate ternary precursor
  • Method for preparing spherical carbonate ternary precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] ① Use pure water to prepare a mixed solution with a molar ratio of nickel, manganese and cobalt elements of 4:4:2 and a concentration of 130g / L, in which the soluble nickel, manganese, and cobalt salts are nickel sulfate, manganese sulfate, and cobalt sulfate, respectively.

[0032] ② Use pure water to prepare ammonium bicarbonate solution with a concentration of 155g / L.

[0033] ③Pump ①solution and ②solution into the reaction kettle, and keep the stirring speed at 180r / min and the temperature at 65-85℃ for continuous production. By adjusting the flow rate of ①solution and ②solution, control the pH at 6.9 and control the alkalinity at 5 ~ 40g / L, control the solid content of the slurry at 70 ~ 130g / L, after the reaction is complete, the slurry will naturally overflow into the aging tank through the overflow port of the reactor.

[0034] In addition, a laser particle size analyzer can be used to detect the particle size of the spherical carbonate ternary precursor in the ...

Embodiment 2

[0039] ① Use pure water to prepare a mixed solution with a molar ratio of nickel, manganese and cobalt elements of 5:3:2 and a concentration of 90g / L, in which the soluble nickel, manganese, and cobalt salts are nickel sulfate, manganese chloride, and cobalt sulfate, respectively.

[0040] ② Use pure water to prepare ammonium bicarbonate solution with a concentration of 115g / L.

[0041] ③ Turn on the ① solution metering pump and ② solution metering pump, pump the ① solution and ② solution into the reaction kettle, keep the stirring speed at 140r / min, and the continuous production at a temperature of 65-85°C. By adjusting the ① solution and ② solution The flow rate is controlled at 6.7, the alkalinity is 5-40g / L, and the solid content of the slurry is 70-130g / L. After the reaction is complete, the slurry naturally overflows into the aging tank through the overflow port of the reactor.

[0042] In addition, a laser particle size analyzer can be used to detect the particle size o...

Embodiment 3

[0047] ① Use pure water to prepare a mixed solution with a molar ratio of nickel, manganese and cobalt elements of 3:3:3 and a concentration of 80g / L, in which the soluble nickel, manganese, and cobalt salts are nickel sulfate, manganese nitrate, and cobalt sulfate, respectively.

[0048] ② Use pure water to prepare ammonium bicarbonate solution with a concentration of 135g / L.

[0049] ③ Turn on the ① solution metering pump and ② solution metering pump, pump the ① solution and ② solution into the reaction kettle, and keep the stirring speed at 170r / min and the temperature at 65-85°C for continuous production. By adjusting the ① solution and ② solution The flow rate is controlled at 6.5, the alkalinity is 5-40g / L, and the solid content of the slurry is 70-130g / L. After the reaction is complete, the slurry naturally overflows into the aging tank through the overflow port of the reactor.

[0050] In addition, a laser particle size analyzer can be used to detect the particle size ...

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Abstract

The invention discloses a method for preparing a spherical nickel-manganese-cobalt carbonate ternary precursor, which comprises the following steps of: continuously adding nickel-manganese-cobalt metal salt mixed solution of certain concentration and precipitant into reaction equipment, controlling the pH of the reaction system to be between 6.5 and 7.5, controlling the alkalinity at 5 to 40g/L, controlling the solid content of the slurry at 70 to 130g/L, and aging, washing and drying the slurry to obtain the spherical nickel-manganese-cobalt carbonate ternary precursor. The prepared spherical nickel-manganese-cobalt carbonate ternary precursor granules are relatively uniform, have good spherical degree, smooth spherical surface, good liquidity and controllable size, and are suitable for industrialized continuous production.

Description

technical field [0001] The invention relates to the field of nickel-cobalt-manganese precursors for positive electrode materials of batteries with spheroidization, in particular to a preparation method of spherical carbonate ternary precursors. Background technique [0002] With the development of science and technology, the use of more and more mobile technology equipment has made lithium-ion secondary batteries widely used, especially in recent years, the rapid development of ternary material lithium-ion batteries. Because of its good performance and low price, it has developed rapidly. To prepare high-performance ternary materials for secondary batteries, it is necessary to prepare precursor materials with good performance. The performance of the precursor materials determines the performance of the prepared ternary materials. The positive electrode material with spheroidization has the characteristics of stable structure, stable performance and long cycle life due to it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G1/00C01G53/06H01M4/1397
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 李世辉王锡芬孙卫华胡昔成孙朝军鲁海春江浩王大伟
Owner ANHUI ALAND NEW ENERGY MATERIALS
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