Method for continuously preparing nanoflower lithium ion battery layered anode material and reaction kettle thereof

A lithium-ion battery, cathode material technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve problems such as difficulty in meeting high energy density and high power density, agglomeration of precursor secondary particles, and poor rate performance of finished products. , to improve the stirring effect, strengthen the convection and diffusion, and achieve the effect of uniform distribution

Inactive Publication Date: 2016-10-26
成都翔羽科技有限公司
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  • Claims
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Problems solved by technology

However, in the traditional hydroxide co-precipitation process, small grains with high surface energy will quickly aggregate, which will seriously agglomerate the secondary particles of the precursor, resulting in poor rate performance of the final product, which is difficult to meet the needs of the new generation of lithium-ion batteries. Batteries need high energy density and high power density
On the other hand, the current main co-precipitation process is mostly intermittent operation, which requires a long wait, slow space velocity, and high unit cost; and intermittent operation can easily lead to poor batch stability.

Method used

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  • Method for continuously preparing nanoflower lithium ion battery layered anode material and reaction kettle thereof
  • Method for continuously preparing nanoflower lithium ion battery layered anode material and reaction kettle thereof
  • Method for continuously preparing nanoflower lithium ion battery layered anode material and reaction kettle thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this embodiment, according to the chemical formula LiNi 0.33 co 0.33 mn 0.33 o 2 Batching, where x=0.33, y=0.33.

[0055] (1) Solution preparation

[0056] Accurately weigh NiSO according to the molar ratio of nickel, cobalt and manganese of 1:1:1 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 0 three kinds of salts, three kinds of mixtures are added in the dissolving tank, and add distilled water under normal pressure and stir until dissolving completely, be made into concentration 3mol / L mixed salt solution; L sodium hydroxide solution; Strong ammonia water is diluted to the ammonia solution of 5mol / L with deionized water;

[0057] (2) Co-precipitation

[0058] Add the mixed salt solution, sodium hydroxide solution and ammonia solution obtained in above-mentioned steps (1) respectively in the reactor, control the mixed salt solution feed flow rate to be 1mL / min, adjust the feed rate of the sodium hydroxide solution to make the reaction system pH value At 11.3±0.2...

Embodiment 2

[0064] In this embodiment, according to the chemical formula LiNi 0.5 co 0.2 mn 0.3 o 2 Batching, where x=0.5, y=0.2.

[0065] (1) Solution preparation

[0066] Accurately weigh NiCl according to the molar ratio of nickel, cobalt and manganese of 5:2:3 2 ·6H 2 O, CoCl 2 ·6H 2 O and MnCl 2 4H 2 O three kinds of salts, three kinds of mixtures are added in the dissolving tank, and add deionized water under normal pressure and stir until completely dissolving, make concentration 1mol / L mixed salt solution; Weigh sodium hydroxide solid and add deionized water to dissolve and be formulated 5mol / L sodium hydroxide solution; dilute concentrated ammonia water to 12mol / L ammonia solution with deionized water;

[0067] (2) Co-precipitation

[0068] Add the above-mentioned mixed salt solution, sodium hydroxide solution and ammonia solution to the reactor respectively, control the mixed salt solution feed flow rate to be 10mL / min, adjust the feed rate of the sodium hydroxide sol...

Embodiment 3

[0074] In this embodiment, according to the chemical formula LiNi 0.5 mn 0.5 o 2 Batching, where x=0.5, y=0.

[0075] (1) Solution preparation

[0076] Accurately weigh Ni(NO 3 ) 2 ·6H 2 O and Mn(CH 3 COO) 2 4H 2 O two kinds of raw materials, put the mixture into the dissolving tank, and add deionized water under normal pressure and stir until completely dissolved to form a mixed salt solution with a concentration of 0.5mol / L; weigh the solid sodium hydroxide and add it into deionized water to dissolve and prepare 0.5 mol / L sodium hydroxide solution; dilute concentrated ammonia water to 1mol / L ammonia solution with deionized water;

[0077] (2) Co-precipitation

[0078] Add the above-mentioned mixed salt solution, sodium hydroxide solution and ammonia solution to the reactor respectively, control the mixed salt solution feed flow rate to be 8mL / min, adjust the feed rate of the sodium hydroxide solution so that the pH value of the reaction system is at 10.3 ± 0.3, Ad...

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Abstract

The invention provides a method for continuously preparing a nanoflower lithium ion battery layered anode material and a reaction kettle realizing the method. The method includes: (1), preparing a: preparing raw materials according to a chemical formula LiNixCoyMn1-x-yO2; (2), co-precipitating: using a co-precipitation method to obtain a reaction product, and subjecting the reaction product to aging, filtering, washing and drying to obtain precursor particles of a nanoflower structure; (3), calcining:calcining the precursor particles at high temperature to obtain the nanoflower lithium ion battery layered anode material. A template agent does not need to be added in the preparation process, and the particles are controllable in size, uniform in distribution and high in uniformity. Three layers of stirring paddles are arranged in the reaction kettle and stir at the same time, so that the materials are quick and uniform in reaction, and the particles are uniform and high in fluidity. By using the method, the lithium ion battery anode material in special nanoflower shape; the method is simple to operate, the reaction kettle is stable and reliable in structure, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a method for preparing a layered positive electrode material, in particular to a method for continuously preparing a layered ternary positive electrode material (LiNi x co y mn 1-x-y o 2 ) method, as well as providing a novel reactor for realizing the method, belonging to the technical field of layered cathode materials. Background technique [0002] Energy is an important material basis for human survival and development. With the gradual reduction of non-renewable energy and increasingly severe environmental problems in the world, the development and application of new energy is urgent, which is in line with the "beautiful China" development strategy. Lithium-ion batteries have attracted widespread attention due to their high energy density, no memory effect, and no noise pollution. Among them, anode materials, separators, and electrolytes have made great breakthroughs. The development of cathode materials has been slow, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525B82Y30/00B01J19/18
CPCB01J19/0053B01J19/006B01J19/18B82Y30/00H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 郭孝东滑纬博向伟吴振国钟本和刘文元
Owner 成都翔羽科技有限公司
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