Preparation method of anode material for lithium ion batteries

A technology for lithium ion batteries and negative electrode materials, applied in the field of materials science, can solve problems such as toxicity and high cost, and achieve the effects of high specific capacity, high economic value, improved capacity and cycle life

Active Publication Date: 2017-11-24
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to Co 3 o 4 The toxicity and high cost make it not an ideal lithium battery negative electrode material

Method used

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  • Preparation method of anode material for lithium ion batteries
  • Preparation method of anode material for lithium ion batteries
  • Preparation method of anode material for lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The invention provides a lithium ion battery negative electrode material ZnCo 2 o 4 A preparation method comprising the steps of:

[0021] (1) A step for preparing metal-organic compounds, dissolving 8-hydroxyquinoline in ethanol, ultrasonically dispersing for 1-30min, forming a uniform solution with a concentration of 0.005-1.5g / mL; and then adjusting the molar ratio to 1: The metal ion salts zinc nitrate and cobalt nitrate of 2 are dissolved in water, and ultrasonically dispersed for 1-30min to form a uniform solution with a concentration of 0.002-2g / mL respectively. Then mix the prepared two solutions according to a certain volume ratio (1:1-1:5), stir for 0.1-24h, and then stand at room temperature for 1-48h after stirring to obtain a suspension. Centrifuge the obtained suspension at a speed of 1000-10000 rpm for 0.1-30 min, wash with the above-mentioned polar solvent containing 8-hydroxyquinoline for 1-20 times, and then wash with water for 1-20 times to obtain a...

Embodiment 2

[0026] The invention provides a lithium ion battery negative electrode material ZnCo 2 o 4 A preparation method comprising the steps of:

[0027] (1) A step for preparing metal-organic compounds, dissolving 8-hydroxyquinoline in ethanol and methanol, and ultrasonically dispersing for 1-30 minutes to form a uniform solution with a concentration of 0.005-1.5g / mL; then the molar ratio is The 1:2 metal ion salt zinc chloride and cobalt sulfate are dissolved in water, ultrasonically dispersed for 1-30min to form a uniform solution with a concentration of 0.002-2g / mL respectively. Then mix the prepared two solutions according to a certain volume ratio (1:1-1:5), stir for 0.1-24h, and then stand at room temperature for 1-48h after stirring to obtain a suspension. Centrifuge the obtained suspension at a speed of 1000-10000 rpm for 0.1-30 min, wash with the above-mentioned polar solvent containing 8-hydroxyquinoline for 1-20 times, and then wash with water for 1-20 times to obtain a ...

Embodiment 3

[0030] The invention provides a lithium ion battery negative electrode material ZnCo 2 o 4 A preparation method comprising the steps of:

[0031] (1) A step for preparing metal-organic compounds, dissolving 8-hydroxyquinoline in methanol, and ultrasonically dispersing for 1-30 minutes to form a uniform solution with a concentration of 0.005-1.5g / mL; then the molar ratio is 1: The metal ion salts zinc acetate and cobalt sulfate of 2 are dissolved in water, and ultrasonically dispersed for 1-30 minutes to form a uniform solution with a concentration of 0.002-2g / mL respectively. Then mix the prepared two solutions according to a certain volume ratio (1:1-1:5), stir for 0.1-24h, and then stand at room temperature for 1-48h after stirring to obtain a suspension. Centrifuge the obtained suspension at a speed of 1000-10000 rpm for 0.1-30 min, wash with the above-mentioned polar solvent containing 8-hydroxyquinoline for 1-20 times, and then wash with water for 1-20 times to obtain a...

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Abstract

The invention provides a preparation method of an anode material for lithium ion batteries. The preparation method comprises the following steps: dissolving metal salt of zinc ions and cobalt ions, then adding a certain amount of a polar solvent containing 8-hydroxyquinoline, after mixing and stirring, standing at room temperature, centrifuging and drying the mixture to obtain a metal organic compound of zinc-cobalt-8-hydroxyquinoline, then putting the obtained metal organic compound into a tubular furnace, calcining in an air atmosphere, taking out the metal organic compound to obtain a layered ZnCo2O4 material, and using the layered ZnCo2O4 material into the anode material for lithium ion batteries. The metal organic compound of zinc-cobalt-8-hydroxyquinoline is synthesized in the solution, and then the layered ZnCo2O4 material is obtained through calcinations, so that the method is simple and convenient in synthesis and is effective, the obtained layered ZnCo2O4 material can serve as the anode material for lithium ion batteries, the anode material is excellent in electrochemical performance and can be applicable for industrial production and practical application.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a lithium ion battery, in particular to a preparation method of a negative electrode material of the lithium ion battery. Background technique [0002] In recent years, lithium-ion batteries with high energy density have been applied to many fields, such as smartphones, laptop computers, electric vehicles, hybrid electric vehicles, and so on. The negative electrode material used in traditional lithium-ion batteries is graphite, but the lithium storage capacity of graphite is only 372mAh g -1 , which severely limits the development of lithium-ion batteries. Although silicon-based and tin-based materials have high lithium storage capacity, these materials suffer from severe volume expansion during charging and discharging of lithium-ion batteries. Therefore, it is of great significance to explore high-performance lithium-ion battery anode materials with low cost, high capacity and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00H01M4/485H01M4/525H01M10/0525
CPCC01G51/40C01P2004/04C01P2004/20H01M4/485H01M4/525H01M10/0525Y02E60/10
Inventor 闵宇霖郭帅楠范金辰时鹏辉徐群杰王啸杜金城
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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