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Nickel-containing precursor, nickel-containing composite material, and preparation methods and applications of nickel-containing precursor and nickel-containing composite material

A technology of composite materials and precursors, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems of lithium-ion battery capacity, poor rate cycle performance, etc., to improve capacity and rate cycle performance, and broad application prospects Effect

Pending Publication Date: 2021-04-09
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of poor capacity and rate cycle performance of the lithium-ion battery corresponding to the high-nickel positive electrode material obtained by the existing method, and to provide a lithium-ion secondary battery that can improve the capacity and rate cycle performance. Nickel-containing precursor and nickel-containing composite material, preparation method and application thereof

Method used

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  • Nickel-containing precursor, nickel-containing composite material, and preparation methods and applications of nickel-containing precursor and nickel-containing composite material
  • Nickel-containing precursor, nickel-containing composite material, and preparation methods and applications of nickel-containing precursor and nickel-containing composite material
  • Nickel-containing precursor, nickel-containing composite material, and preparation methods and applications of nickel-containing precursor and nickel-containing composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of nickel-containing precursor:

[0054] S1, nickel sulfate, cobalt sulfate, manganese sulfate are dissolved in water according to the ratio of Ni:Co:Mn molar ratio 83:11:6 and are formulated with the metal salt solution that the total concentration of metal salt is 2mol / L, and sodium hydroxide is dissolved in The aqueous sodium hydroxide solution (lye) with a concentration of 4 mol / L is prepared in water, and the aqueous ammonia solution with a concentration of 4 mol / L is prepared with ammonia water.

[0055] S2. Pass the metal salt solution, lye and ammonia solution into the reaction kettle equipped with half a pot of deionized water at the same time, and the feeding rate of the metal salt solution is controlled at 10L h -1 , the initial feed rate of ammonia solution was controlled at 1.3L h -1 , the initial lye feed rate was controlled at 3.0L h -1 , the temperature in the reactor is controlled at 60°C, the stirring frequency is controlled at 20Hz, ...

Embodiment 2

[0059] (1) Preparation of nickel-containing precursor:

[0060] S1, nickel sulfate, cobalt sulfate, manganese sulfate are dissolved in water according to the ratio of Ni:Co:Mn molar ratio 83:11:6 and are formulated with the metal salt solution that the total concentration of metal salt is 2mol / L, and sodium hydroxide is dissolved in The aqueous sodium hydroxide solution (lye) with a concentration of 4 mol / L is prepared in water, and the aqueous ammonia solution with a concentration of 4 mol / L is prepared with ammonia water.

[0061] S2. Pass the metal salt solution, lye and ammonia solution into the reaction kettle equipped with half a pot of deionized water at the same time, and the metal salt solution feed rate is controlled at 12L h -1 , the initial feed rate of ammonia solution was controlled at 1.3L h -1 , the initial lye feed rate was controlled at 3.3L h -1 , the temperature in the reactor is controlled at 60°C, the stirring frequency is controlled at 20Hz, the pH val...

Embodiment 3

[0067] (1) Preparation of nickel-containing precursor:

[0068] S1. Dissolve nickel sulfate, cobalt sulfate, manganese sulfate, and aluminum nitrate in water according to the ratio of Ni:Co:Mn:Al molar ratio 83:11:5:1 to prepare a metal salt solution with a total concentration of metal salt of 2mol / L , Sodium hydroxide is dissolved in water to be prepared as a 4mol / L aqueous sodium hydroxide solution (lye), and ammonia water is prepared as a 4mol / L ammonia solution.

[0069] S2. Pass the metal salt solution, lye and ammonia solution into the reaction kettle equipped with half a pot of deionized water at the same time, and the metal salt solution feed rate is controlled at 15L h -1 , the initial feed rate of ammonia water was controlled at 1.7L h -1 , the initial lye feed rate was controlled at 4.0L h -1 , the temperature in the reactor is controlled at 60°C, the stirring frequency is controlled at 20Hz, the pH value is controlled at 11.6±1.0, and the feeding speed of the lye...

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Abstract

The invention belongs to the field of lithium ion batteries, and relates to a nickel-containing precursor, a nickel-containing composite material, and preparation methods and applications of the nickel-containing precursor and the nickel-containing composite material. The nickel-containing precursor comprises a nickel-containing seed crystal and primary particles distributed on the outer edge of the nickel-containing seed crystal in a radial direction. The composition of the nickel-containing precursor is represented by the chemical formula Ni<x>Co<y>M (OH)<2>, wherein M is Mn and / or Al, x is larger than or equal to 0.8, y is larger than or equal to 0 and smaller than or equal to 0.2, z is larger than or equal to 0 and smaller than or equal to 0.2, and x, y and z sum to 1. The nickel-containing seed crystal is composed of a primary particle loose inner core and a surface compact layer which are disorderly distributed inside, and has a hollow pore structure inside after solid-phase sintering. The nickel-containing composite material provided by the invention can significantly improve the capacity and rate cycle performance of a positive electrode material of a lithium ion secondary battery, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and in particular relates to a nickel-containing precursor, a nickel-containing composite material and a preparation method and application thereof. Background technique [0002] With the rapid development of portable mobile devices, new energy vehicles, energy storage and other fields, the demand for lithium-ion secondary batteries with high energy density continues to increase. As the key material of lithium-ion batteries, cathode materials play an important role in the performance of lithium-ion batteries. Due to the pursuit of high energy density and high output characteristics, cathode materials have become a research hotspot for those skilled in the art. However, during the charging and discharging process, the cycle attenuation caused by the intensification of the volume change of the positive electrode material unit cell also restricts the development of positive electrode materials....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/50H01M4/485H01M4/505H01M4/525H01M4/364H01M10/0525H01M2004/028C01P2002/72C01P2004/03Y02E60/10
Inventor 姜龙林建雄张鹏曾雷英
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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