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Preparation method and application of precursor of aluminum and zirconium doped lithium nickelate positive electrode material

A positive electrode material and precursor technology, applied in the field of precursor preparation, can solve the problem that the precursor cannot be uniformly dispersed, and achieve the effect of uniform distribution of internal elements, high tap density, and controllable morphology

Pending Publication Date: 2021-12-17
深圳石墨烯创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the present invention provides a preparation method and application of a precursor of aluminum and zirconium-doped lithium nickelate positive electrode materials to solve the problem that the precursor cannot be formed and dispersed uniformly due to inappropriate element types in the prior art. The problem of spherical particles with uniform appearance and consistent particle size

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  • Preparation method and application of precursor of aluminum and zirconium doped lithium nickelate positive electrode material
  • Preparation method and application of precursor of aluminum and zirconium doped lithium nickelate positive electrode material
  • Preparation method and application of precursor of aluminum and zirconium doped lithium nickelate positive electrode material

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Embodiment 1

[0033] Example 1 Preparation method and application of a precursor of aluminum and zirconium doped lithium nickelate positive electrode material

[0034] The implementation of the present invention provides a precursor for preparing aluminum, zirconium doped lithium nickelate positive electrode material and a method for preparing aluminum, zirconium doped lithium nickelate positive electrode material using the precursor, which comprises the following steps:

[0035] Step 1, configuring a mixed salt solution with a nickel ion concentration of 2mol / L and a zirconium ion concentration of 0.003mol / L;

[0036] Step 2, taking an appropriate amount of aluminum sulfate hexadecahydrate and adding it to a sodium hydroxide solution with a concentration of 4.5 mol / L to form a 0.1 mol / L sodium metaaluminate mixed solution;

[0037] Step 3. Add the mixed salt solution, sodium metaaluminate mixed solution and ammonia solution into a 55°C constant temperature stirring synthesis tank with a ma...

Embodiment 2

[0045] Example 2 Preparation method and application of a precursor of aluminum and zirconium doped lithium nickelate positive electrode material

[0046]The implementation of the present invention provides a precursor for preparing aluminum, zirconium doped lithium nickelate positive electrode material and a method for preparing aluminum, zirconium doped lithium nickelate positive electrode material using the precursor, which comprises the following steps:

[0047] Step 1, configure the mixed salt solution whose nickel ion concentration is 2mol / L and zirconium ion concentration is 0.004mol / L;

[0048] Step 2, taking an appropriate amount of aluminum nitrate nonahydrate and adding it to a sodium hydroxide solution with a concentration of 4.5mol / L to form a 0.1mol / L sodium metaaluminate mixed solution;

[0049] Step 3. Add the mixed salt solution, sodium metaaluminate mixed solution and ammonia solution into a 50°C constant temperature stirring synthesis tank with a mass concent...

Embodiment 3

[0057] Example 3 Preparation method and application of a precursor of aluminum and zirconium doped lithium nickelate cathode material

[0058] The implementation of the present invention provides a precursor for preparing aluminum, zirconium doped lithium nickelate positive electrode material and a method for preparing aluminum, zirconium doped lithium nickelate positive electrode material using the precursor, which comprises the following steps:

[0059] The implementation of the present invention provides a method for preparing aluminum, zirconium-doped spherical lithium nickelate positive electrode material and special precursor thereof, which comprises the following steps:

[0060] Step 1, configuring a mixed salt solution with a nickel ion concentration of 1.75mol / L and a zirconium ion concentration of 0.0025mol / L;

[0061] Step 2, taking an appropriate amount of aluminum nitrate nonahydrate and adding it to a sodium hydroxide solution with a concentration of 4mol / L to fo...

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Abstract

The invention discloses a preparation method and application of a precursor of an aluminum and zirconium doped lithium nickelate positive electrode material, which particularly relate to the field of electrode materials. The method comprises the following steps of preparing a sodium metaaluminate solution, preparing product slurry and preparing a precursor, so as to obtain the special precursor spheroidic nickel hydroxide for preparing the aluminum and zirconium doped spheroidic lithium nickelate positive electrode material. The precursor prepared by the preparation method of the precursor of the aluminum and zirconium doped lithium nickelate positive electrode material can be applied to preparation of the aluminum and zirconium doped spheroidic lithium nickelate positive electrode material. The aluminum and zirconium doped lithium nickelate precursor synthesized by the method is in a spheroidic secondary particle morphology, the particle morphology is uniform, internal elements are uniformly distributed, and the tap density is high. And the lithium nickelate positive electrode material formed by mixing and sintering the precursor and lithium hydroxide has excellent electrochemical performances such as high capacity and long cycle.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a preparation method and application of a precursor of aluminum and zirconium doped lithium nickelate cathode material. Background technique [0002] Lithium nickel oxide is also referred to as lithium nickelate for short, and its general chemical formula is LiNiO 2 , is a lithium-ion battery cathode material, which is considered as one of the most promising cathode materials in the future because of its ultra-high specific capacity above 220mAh / g and high discharge platform voltage of 3.8V. 2+ Ions and Li + The ionic radii are similar, so pure lithium nickelate is very prone to severe nickel-lithium mixing in the lattice, thereby reducing the cycle performance of the material. [0003] At present, in response to the above problems, industry researchers often use material modification methods such as doping and coating to reduce the degree of cation mixing of lithium nickelat...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M4/38
CPCC01G53/04C01G53/42H01M4/525H01M4/38C01P2004/32C01P2004/03C01P2006/40Y02E60/10
Inventor 王浩秦显营李宝华
Owner 深圳石墨烯创新中心有限公司
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