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Nickel-cobalt-aluminum ternary lithium ion battery anode material, preparation method therefor and application thereof, and lithium ion battery

A technology for lithium-ion batteries and positive electrode materials, which is applied in the direction of lithium batteries, battery electrodes, positive electrodes, etc., and can solve the problems of reducing material cycle stability and increasing battery impedance

Pending Publication Date: 2020-03-20
FACTORIAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the nickel-cobalt-aluminum ternary material will have a strong side reaction with the organic electrolyte in a wide voltage range, it will increase the impedance of the battery during charge and discharge, and reduce the cycle stability of the material.

Method used

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  • Nickel-cobalt-aluminum ternary lithium ion battery anode material, preparation method therefor and application thereof, and lithium ion battery
  • Nickel-cobalt-aluminum ternary lithium ion battery anode material, preparation method therefor and application thereof, and lithium ion battery
  • Nickel-cobalt-aluminum ternary lithium ion battery anode material, preparation method therefor and application thereof, and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0213] What this embodiment provides is to adopt cladding material ZrO 2 Coated nickel-cobalt-aluminum ternary lithium-ion battery cathode material, chemical formula is (Li 1.035 Ni 0.815 co 0.15 Al 0.035 ) 0.9984 Zr 0.0016 o 2 , M is Zr, x=0.15, y=0.035, a=1.035, b=0.0016.

[0214] The nickel-cobalt-aluminum ternary lithium-ion battery cathode material (Li 1.035 Ni 0.815 co 0.15 Al 0.035 ) 0.9984 Zr 0.0016 o 2 The preparation method comprises the following steps:

[0215] Step (1), the first sintering: the ternary cathode material precursor Ni 1-x-y co x Al y (OH) 2+ySintering, heating up to 500°C for 10 hours;

[0216] Step (2), the second sintering: after drying the lithium hydroxide monohydrate until the crystal water is completely lost, mix it with the sintered product of the step (1) in proportion, and the amount of lithium hydroxide monohydrate is hydrogen monohydrate The molar ratio of Li in lithium oxide to (Ni+Co+Al) in the precursor of the ternary...

Embodiment 2

[0220] What this embodiment provides is to adopt cladding material ZrO 2 Coated nickel-cobalt-aluminum ternary lithium-ion battery cathode material, chemical formula is (Li 1.035 Ni 0.815 co 0.15 al 0.035 ) 0.9992 Zr 0.0008 o 2 , M is Zr, x=0.15, y=0.035, a=1.035, b=0.0008.

[0221] The nickel-cobalt-aluminum ternary lithium-ion battery cathode material (Li 1.035 Ni 0.815 co 0.15 al 0.035 ) 0.9992 Zr 0.0008 o 2 The preparation method comprises the following steps:

[0222] Step (1), the first sintering: the ternary cathode material precursor Ni 1-x-y co x al y (OH) 2+y Sintering, heating up to 600°C for 6.5 hours;

[0223] Step (2), the second sintering: after drying the lithium hydroxide monohydrate until the crystal water is completely lost, mix it with the sintered product of the step (1), and the amount of lithium hydroxide monohydrate is lithium hydroxide monohydrate The molar ratio of Li and (Ni+Co+Al) in the precursor of the ternary cathode material i...

Embodiment 3

[0227] This example provides the use of Al 2 o 3 Coated nickel-cobalt-aluminum ternary lithium-ion battery cathode material, chemical formula is (Li 1.035 Ni 0.815 co 0.15 al 0.035 ) 0.998 al 0.002 o 2 , M is Al, x=0.15, y=0.035, a=1.035, b=0.002.

[0228] The nickel-cobalt-aluminum ternary lithium-ion battery cathode material (Li 1.035 Ni 0.815 co 0.15 al 0.035 ) 0.998 al 0.002 o 2 The preparation method comprises the following steps:

[0229] Step (1), the first sintering: the ternary cathode material precursor Ni 1-x-y co x al y (OH) 2+y Sintering, heating up to 500°C for 10 hours;

[0230] Step (2), the second sintering: after drying the lithium hydroxide monohydrate until the crystal water is completely lost, mix it with the sintered product of the step (1), and the amount of lithium hydroxide monohydrate is lithium hydroxide monohydrate The molar ratio of Li and (Ni+Co+Al) in the precursor of the ternary cathode material is 1.035:1. After mixing and g...

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Abstract

A nickel-cobalt-aluminum ternary lithium ion battery anode material, and a preparation method therefor and an application thereof. The chemical formula of the material is (Li aNi 1-x-yCo xAl y) 1-bM bO 2, x>0, y>0, 1-x-y>0, 1<=a<=1.1, 0<b<=0.02. The preparation method for the material comprises: firstly sintering a ternary anode material precursor Ni 1-x-yCo xAl y(OH) 2+y; then adding the sinteredproduct into a lithium source for sintering; and finally adding a coating material and sintering to obtain a target product. The nickel-cobalt-aluminum ternary lithium ion battery anode material synthesized according to the preparation method has excellent cycle performance. The described preparation method is simple in technology, controllable in process and easy for industrial mass production.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a positive electrode material for a nickel-cobalt-aluminum ternary lithium ion battery, a preparation method and an application. Background technique [0002] Nickel-cobalt-aluminum ternary cathode materials have the characteristics of high energy density, good low-temperature performance, good thermal stability, low cost, and low environmental toxicity. It is one of the most promising cathode materials in the field of power lithium-ion batteries. However, because the nickel-cobalt-aluminum ternary material will have a strong side reaction with the organic electrolyte in a wide voltage range, it will increase the impedance of the battery during charge and discharge, and reduce the cycle stability of the material. Therefore, how to improve the cycle stability of nickel-cobalt-aluminum ternary materials has become one of the urgent problems to be solved in the industry. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/525H01M4/62H01M4/131H01M10/0525
CPCH01M4/525H01M4/485H01M4/628H01M4/131H01M10/0525H01M2004/028H01M2004/021Y02E60/10H01M4/1391H01M4/366H01M4/62H01M10/052C01G53/42C01P2004/84C01P2002/54C01P2006/11C01P2006/80C01P2002/52C01P2006/40H01M2004/027
Inventor 任东方艳沈赟
Owner FACTORIAL INC
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