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Preparation method for high-density nickel hydroxide doped precursor

A technology of nickel-cobalt hydroxide and nickel hydroxide, which is applied in the fields of chemical instruments and methods, nickel compounds, inorganic chemistry, etc. It can solve the problems of uniform mixing of Ni-Co-Al, unsuitable feeding speed, low production efficiency, etc. problems, to achieve the effect of inhibiting individual crystallization, easy control, and high tap density

Active Publication Date: 2019-01-11
江西九鼎动力新能源科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method involved has the following problems: 1. The method involves adding nickel-cobalt salt and aluminum salt separately, which is difficult to ensure the uniform mixing of Ni-Co-Al in the precursor; 2. In order to ensure that the elements are evenly mixed, the feeding speed should not be too high Fast, resulting in low production efficiency; 3, multi-branch feeding, difficult process control, high technical difficulty

Method used

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  • Preparation method for high-density nickel hydroxide doped precursor
  • Preparation method for high-density nickel hydroxide doped precursor
  • Preparation method for high-density nickel hydroxide doped precursor

Examples

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Embodiment 1

[0032] A method for preparing a high-density doped nickel cobalt hydroxide precursor, specifically comprising the following steps:

[0033] (1) Prepare nickel nitrate, cobalt sulfate, aluminum chloride solutions, Ni in nickel nitrate solution 2+ The concentration is 1mol / L, Co in cobalt sulfate solution 2+ The concentration is 1mol / L, Al in the aluminum chloride solution 3+ The concentration of the ammonia water is 0.1mol / L, and the ammonia water with a concentration of 2mol / L is added under the condition of stirring, and the ammonia water is in accordance with the molar ratio of ammonia to metal ions NH 3 : Metal ion=8:1 ratio is added, respectively form stable and homogeneous complex solution, i.e. nickel-ammonia complex solution, cobalt-ammonia complex solution, aluminum ammonia complex solution;

[0034] (2) According to Ni 0.98 co 0.01 al 0.01 (OH) 2 stoichiometric ratio, the step (1) obtained three kinds of complex solution according to the ratio of Ni:Co:Al=0.98:0...

Embodiment 2

[0039] A method for preparing a high-density doped nickel cobalt hydroxide precursor, specifically comprising the following steps:

[0040] (1) Prepare nickel sulfate, cobalt chloride, aluminum nitrate salt solution, Ni in nickel sulfate solution 2+ Concentration of 2mol / L, Co in cobalt chloride solution 2+ The concentration is 2mol / L, Al in aluminum nitrate solution 3+ The concentration of the ammonia water is 1mol / L, and the ammonia water with a concentration of 5mol / L is added under the condition of stirring, and the ammonia water is in accordance with the molar ratio of ammonia to metal ions NH 3 : metal ions=12:1 ratio is added to form a stable and uniform complex solution respectively, i.e. nickel ammonia complex solution, cobalt ammonium complex solution, aluminum ammonia complex solution;

[0041] (2) According to Ni 0.815 co 0.15 al 0.035 (OH) 2 The stoichiometric ratio of the three complex solutions obtained in step (1) is stirred and mixed according to the r...

Embodiment 3

[0046] A method for preparing a high-density doped nickel cobalt hydroxide precursor, specifically comprising the following steps:

[0047] (1) Prepare nickel chloride, cobalt nitrate, and manganese sulfate solutions respectively, and Ni in nickel chloride solution 2+ The concentration is 1.5mol / L, Co in cobalt nitrate solution 2+ The concentration is 1.5mol / L, Mn in manganese sulfate solution 3+ The concentration of ammonia water is 0.5mol / L, under the condition of stirring, add ammonia water with a concentration of 14mol / L to the above solution respectively, and the ammonia water is according to the molar ratio of ammonia to metal ions NH 3 : Metal ion=10:1 ratio is added, and what form stable and homogeneous complex solution respectively obtains is respectively nickel ammonia complex solution, cobalt ammonia complex solution, manganese ammonia complex solution;

[0048] (2) According to Ni 0.7 co 0.2 mn 0.1 (OH) 2 Stir and mix the three complex solutions obtained in ...

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Abstract

The invention discloses a preparation method for a high-density nickel hydroxide doped precursor. The preparation method comprises the following steps: preparing stable complexing solutions by respectively adding ammonium hydroxide into nickel salt, cobalt salt and doped saline solutions; mixing the stable complexing solutions, thereby acquiring a stable mixed solution; adding the mixed solution,a sodium hydroxide solution and air flow into a reaction kettle for continuous coprecipitation reaction; realizing the continuous preparation of the high-density nickel hydroxide doped precursor by controlling system temperature, concentration, pH value, reaction time, and the like. The high-density nickel hydroxide doped precursor acquired according to the invention is high in degree of crystallinity; nickel, cobalt and doped metals in the product are uniformly mixed; control on the specific area and grain size of the precursor can be realized; the process is simple and feasible; the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of lithium ion battery manufacturing, in particular to a method for preparing a high-density doped nickel cobalt hydroxide precursor. Background technique [0002] At present, lithium-ion batteries have been widely used in various mobile electronic products, power tools and static energy storage, and cathode materials are the key to improving energy density, safety and reducing costs in lithium-ion batteries. Improving the power density and energy density of the material while taking into account its safety performance and reducing cost is the key research direction of cathode materials for lithium-ion batteries today. [0003] LiNi 1-x-y co x m y o 2 The material also has the advantages of high energy density, good thermal stability, low price and environmental protection, and has become a high-end energy storage material in the field of 3C and power battery. It is generally believed that Ni 1-x-y co x m y (O...

Claims

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Application Information

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IPC IPC(8): C01G53/00B82Y40/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525B82Y40/00C01G53/006H01M2004/028C01P2004/03C01P2002/72C01P2006/11C01P2006/12C01P2004/64Y02E60/10
Inventor 段建国张英杰董鹏王丁
Owner 江西九鼎动力新能源科技股份有限公司
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