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Preparation method and application of cathode material of fast ion conductor coated modified lithium ion battery

A technology for lithium ion batteries and positive electrode materials, which is applied in battery electrodes, electrolyte battery manufacturing, batteries, etc., can solve the problems of complex operation of fast ion conductors, difficult to industrialize production, and high cost, so as to improve electrochemical performance and prevent dissolution. The effect of churn, improving efficiency

Active Publication Date: 2016-09-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional coating method, the preparation process of fast ion conductors has the disadvantages of complicated operation and high cost, and it is difficult to realize large-scale industrial production

Method used

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  • Preparation method and application of cathode material of fast ion conductor coated modified lithium ion battery
  • Preparation method and application of cathode material of fast ion conductor coated modified lithium ion battery
  • Preparation method and application of cathode material of fast ion conductor coated modified lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) According to LiAlO 2 The relative positive electrode material is 1% mass percent to take by weighing ultrafine (nanoscale) aluminum powder and LiNi with a particle diameter of 300nm 0.5 co 0.2 mn 0.3 o 2 The positive electrode material was added to a 250mL steel ball mill jar filled with agate balls, and then adjusted to 400p / min for grinding for 2h.

[0036] (2) aluminum powder and LiNi after grinding activation in step (1) 0.5 co 0.2 mn 0.3 o 2 The positive electrode material mixture was added into a three-necked flask containing 100 mL of a LiCl solution with a concentration of 1 mol / L, and stirred and reacted at 50° C. for 1 h.

[0037] (3) Wash the precipitate obtained in step (2) with deionized water for 3 times, then wash with absolute ethanol for 3 times, then filter, and keep the filter cake in a blast oven at 80°C for 12 hours to obtain xLi + ·Al(OH) 3 ·yH 2 The precursor of O-coated cathode materials.

[0038] (4) Put the precursor obtained in ...

Embodiment 2

[0045] (1) According to LiAlO 2 The relative positive electrode material is 0.5% mass percent to weigh the superfine aluminum powder (nanoscale) and LiNi with a particle diameter of 100nm respectively. 0.85 co 0.05 mn 0.1 o 2 The positive electrode material was added to a 250mL steel ball mill jar filled with agate balls, and then the rotation speed was adjusted to 500p / min for grinding for 4h.

[0046] (2) aluminum powder and LiNi after grinding activation in step (1) 0.85 co 0.05 mn 0.1 o 2 The positive electrode material mixture is added to the 100mL concentration of 0.5mol / L LiNO 3 In the three-necked flask of the solution, the reaction was stirred at 60° C. for 2 h.

[0047] (3) Wash the precipitate obtained in step (2) with deionized water for 3 times, then wash with absolute ethanol for 3 times, then filter, and keep the filter cake in a blast oven at 80°C for 12 hours to obtain xLi + ·Al(OH) 3 ·yH 2 The precursor of O-coated cathode material.

[0048] (4) P...

Embodiment 3

[0052] (1) According to LiAlO 2 The relative positive electrode material is 2% mass percent to weigh the superfine aluminum powder (nanoscale) and LiNi with particle diameter of 100nm respectively. 0.333 co 0.333 mn 0.333 o 2 The positive electrode material was added to a steel ball mill jar with a capacity of 250mL filled with agate balls, and then the speed was adjusted to 600p / min for grinding for 5h.

[0053] (2) aluminum powder and LiNi after grinding activation in step (1) 0.333 co 0.333 mn 0.333 o 2 The positive electrode material mixture was added into a three-necked flask containing 100 mL of LiOH solution with a concentration of 2 mol / L, and stirred and reacted at 80° C. for 5 h.

[0054] (3) Wash the precipitate obtained in step (2) with deionized water for 3 times, then wash with absolute ethanol for 3 times, then filter, and keep the filter cake in a blast oven at 80°C for 12 hours to obtain xLi + ·Al(OH) 3 ·yH 2 The precursor of O-coated cathode materia...

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Abstract

The invention discloses a preparation method and application of a cathode material of a fast ion conductor coated modified lithium ion battery. The method comprises the following steps: after ball-milling and mixing nanoscale aluminum powder and a cathode material, stirring and reacting with a lithium-containing solution to obtain an aluminum hydroxide colloid coated cathode material precursor; calcining the aluminum hydroxide colloid coated cathode material precursor under a high temperature to obtain the cathode material of the fast ion conductor coated modified lithium ion battery with compact uniformity and good stability. The method can be used for preparing the cathode of the lithium ion battery with high rate capacity and high cycle performance; and the preparation method has the characteristics of low cost, simple operation, environmental friendliness and the like, and can be applied to large-scale industrial production.

Description

technical field [0001] The present invention relates to a preparation method of a modified lithium-ion battery positive electrode material, in particular to a preparation method of a fast ion conductor-coated modified lithium-ion battery positive electrode material, and its application in the preparation of a lithium-ion battery with a high cycle life. It belongs to the technical field of lithium ion batteries. Background technique [0002] Today, the rapid development of mobile electronic devices, such as smart phones, digital cameras, and notebook computers, as well as electric and hybrid vehicles, has promoted the rapid development of lithium-ion secondary battery technology. However, the current cathode materials for lithium-ion batteries, such as lithium cobaltate, spinel lithium manganate, and lithium iron phosphate, all have the disadvantage of low cycle life and cannot meet the requirements of future pure electric equipment. Therefore, research and development of a ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M4/131H01M4/1391H01M10/0525H01M10/058
CPCH01M4/131H01M4/1391H01M4/362H01M4/505H01M4/525H01M4/628H01M10/0525H01M10/058H01M2220/20H01M2220/30Y02E60/10Y02P70/50
Inventor 张治安赖延清徐明张凯李劼
Owner CENT SOUTH UNIV
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