Nickel composite hydroxide and manufacturing method thereof

A composite hydroxide and composite salt technology, applied in the field of lithium-ion batteries, to achieve excellent comprehensive performance, simple preparation method, and excellent comprehensive performance

Active Publication Date: 2019-07-02
HUNAN SHANSHAN ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the above patents have only solved a certain unilateral problem of nickel composite hydroxide by controlling the preparation conditions of nickel composite hydroxide, and all of them are whether the inside of the nickel composite hydroxide particle is compacted, whether the primary particle size in the secondary particle is No mention at all on consistent issues

Method used

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  • Nickel composite hydroxide and manufacturing method thereof
  • Nickel composite hydroxide and manufacturing method thereof
  • Nickel composite hydroxide and manufacturing method thereof

Examples

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Embodiment 1

[0044] A kind of nickel composite hydroxide, its general formula is Ni 0.9 co 0.05 mn 0.05 (OH) 2 , the nickel composite hydroxide is a spherical secondary particle with a narrow particle size distribution, the primary particles constituting the secondary particle have good size consistency, the average particle diameter D50 of the secondary particle is 9.5 μm, and the center of the secondary particle is compacted.

[0045] The preparation method of nickel composite hydroxide in the present embodiment may further comprise the steps:

[0046] (1) In the 50L reactor, under the protection of a nitrogen atmosphere, add a nickel compound salt solution with a total metal ion concentration of 2.05mol / L, a 6mol / L sodium hydroxide solution and 10mol / L ammonia liquid, and control the reaction kettle The internal pH value is 12.4, the ammonia value is 4g / L, the reaction temperature is 50°C, the stirring speed is 50Hz, and the crystal nucleus slurry with a particle size of 1.8μm is pre...

Embodiment 2

[0054] A kind of nickel composite hydroxide, its general formula is Ni 0.9 co 0.05 mn 0.05 (OH) 2 , the secondary particle average particle size D50 is 7 μm, and the preparation method of the nickel composite hydroxide comprises the following steps:

[0055] (1) In the 50L reactor 1, under the protection of a nitrogen atmosphere, add a nickel compound salt solution with a total metal ion concentration of 2.05mol / L, a 6mol / L sodium hydroxide solution and 10mol / L ammonia liquid to control the reaction The pH value in the kettle is 12.4, the ammonia value is 4g / L, the reaction temperature is 50°C, and the stirring speed is 50Hz, and a crystal nucleus slurry with a particle size of 1.8μm is prepared;

[0056] (2) in the crystal nucleus slurry that obtains in step (1), continue to add metal ion total concentration and be the nickel compound salt solution of 1.5mol / L, the sodium hydroxide solution of 6mol / L and the ammoniacal liquor of 10mol / L, control The pH value in the reacti...

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Abstract

The invention discloses a nickel composite hydroxide. A generator formula of the nickel composite hydroxide is Ni1-xMx(OH)2, wherein 0.6<=x<1 and the M is at least one of Co, Ti, Zr, Mo, Mn, Al, Cr, W, B, Mg, Ba, Nb, and Sr. The nickel composite hydroxide is spherical secondary particles formed by agglomeration of primary particles. Standard deviation sigma of length of the primary particles is less than 145. The centers of the secondary particles are compacted. The invention also correspondingly provides a preparation method of the nickel composite hydroxide. The nickel composite hydroxide ofthe invention has the high comprehensive performance of good primary particle consistency, narrow secondary particle size distribution, good sphericity and compacted secondary particle internal centers. The preparation method of the invention is simple. The prepared nickel composite hydroxide has excellent comprehensive performance by controlling reaction conditions of different processes. In addition, the preparation method of the invention can be continuously operated and can realize large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a precursor of positive electrode materials and a preparation method thereof. Background technique [0002] In recent years, with the advancement of electronic technology and the popularization of electronic equipment, especially the high functionality of portable electronic equipment such as mobile phones and notebook computers, people have strong expectations for the development of batteries with high energy density, small size and light weight. In addition, with the rapid promotion of electric vehicles, higher requirements are placed on the energy density of power batteries. In order to obtain lithium-ion batteries with higher capacity and lower cost, lithium-ion batteries using lithium-nickel composite oxide as the positive electrode material have emerged as the times require. [0003] Nickel composite hydroxide is the precursor of lithium-nickel composite ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M10/0525
CPCH01M4/525H01M10/0525Y02E60/10
Inventor 彭威陈九华杨志谭欣欣晁锋刚
Owner HUNAN SHANSHAN ENERGY TECH CO LTD
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