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Cuprous oxide doped lithium ion battery negative electrode material, preparation method thereof, application, and lithium ion battery

A technology for lithium cuprous oxide and lithium-ion batteries, which is applied in battery electrodes, copper oxide/copper hydroxide, secondary batteries, etc., and can solve the problem of short cycle life, low capacity, and impact on the cycle discharge capacity and cycle use of lithium-ion batteries Life and other issues, to achieve high production efficiency, simple equipment, good economic and environmental benefits

Active Publication Date: 2020-04-28
HUBEI UEE ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It not only has low capacity and short cycle life, but the most serious thing is that the volume expansion of graphite anode materials is serious during the cycle process, which seriously affects the cycle discharge capacity and cycle life of lithium-ion batteries.
It is difficult to meet the performance requirements of multiple lithium-ion batteries for mobile electrical equipment, especially the requirements of electric vehicles for high capacity, long life, high rate and high safety of lithium-ion batteries

Method used

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  • Cuprous oxide doped lithium ion battery negative electrode material, preparation method thereof, application, and lithium ion battery
  • Cuprous oxide doped lithium ion battery negative electrode material, preparation method thereof, application, and lithium ion battery
  • Cuprous oxide doped lithium ion battery negative electrode material, preparation method thereof, application, and lithium ion battery

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Experimental program
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Effect test

Embodiment 1

[0073] A kind of doping coating doped Cu 2 The preparation method of O negative electrode material, its step is:

[0074] The first step, to 50mLCu 2+ The concentration is 0.1M, Cu 2+ :La 3+ Add 5mL, 0.1M potassium hydroxide solution to the mixture solution of copper nitric acid and lanthanum nitrate with a molar ratio of 100:0.2, and 5 mmol (about 0.34 g) of ethylenediamine, and stir to mix evenly;

[0075] In the second step, 10 mL of water chestnut starch reducing agent solution with a concentration of 5 wt % and 5 mL of acetic acid solution with a concentration of 0.1 M were added to the mixed solution, and stirred and reacted for 45 minutes at 45° C. to obtain a mixed solution;

[0076]In the third step, add 0.5 g of sodium silicate powder to the mixture solution obtained in the second step, stir for 3 minutes, add 10 mL of hydrochloric acid with a concentration of 0.2 M, and continue stirring for 25 minutes; stand still for 5 minutes, and centrifuge the mixture to rem...

Embodiment 2

[0080] A kind of doping coating doped Cu 2 The preparation method of O negative electrode material, its step is:

[0081] The first step, to 100mLCu 2+ The concentration is 0.3M, Cu 2+ :La 3+ Add 10mL, 0.2M sodium hydroxide solution to the mixture solution of copper sulfate, lanthanum sulfate, and 30 mmoles of propylenediamine in a molar ratio of 100:0.4, and stir and mix evenly;

[0082] In the second step, add 10 mL of lotus root starch reducing agent solution with a concentration of 8 wt % to the above mixed solution, add 10 mL of 1.0 M propionic acid solution, and stir for 35 minutes at 55 ° C;

[0083] In the third step, add 1.5 g of sodium silicate powder to the mixture solution obtained in the second step, stir for 6 minutes, add 15 mL of 0.4 M hydrochloric acid, and continue stirring for 35 minutes; stand still for 10 minutes, and centrifuge the mixture to remove the solution. The precipitate was rinsed with 0.01M sodium hydroxide solution for 3 to 5 times to obtai...

Embodiment 3

[0087] A kind of doping coating doped Cu 2 The preparation method of O negative electrode material, its step is:

[0088] The first step, to 200mLCu 2+ The concentration is 0.75M, Cu 2+ :La 3+ Molar ratio is 100:0.6 cupric chloride and lanthanum chloride, in the complex mixture solution containing 0.15 mole butammonium diammonium, add the lithium hydroxide solution that 20mL concentration is 0.3M, stir and mix;

[0089] In the second step, add 40 mL of sweet potato starch solution with a concentration of 12 wt % to the above mixed solution, add 20 mL of butyric acid solution with a concentration of 0.3 M, and stir for 25 minutes at 65 ° C;

[0090] In the third step, add 4.0 g of sodium silicate powder to the mixture solution obtained in the second step, stir for 12 minutes, add 30 mL of hydrochloric acid with a concentration of 0.8 M, and continue stirring for 45 minutes; stand still for 20 minutes, and centrifuge the mixture to remove solution, and the precipitate was ri...

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Abstract

The invention belongs to the technical field of lithium ion battery materials and relates to a cuprous oxide doped lithium ion battery negative electrode material, a preparation method thereof, application and a lithium ion battery. The preparation method comprises the following steps of: 1) preparing a La <3+> doped Cu2O core; 2) preparing a lithium-philic layer on the surface of the core obtained in the step 1); and 3) preparing a conductive metal layer on the surface of the lithium-philic layer obtained in the step 2), and performing roasting to obtain the cuprous oxide doped lithium ion battery negative electrode material. According to the preparation method of the cuprous oxide doped lithium ion battery negative electrode material of the invention, since the cuprous oxide doped lithium ion battery negative electrode material is doped with the La <3+> ions and is coated with the SiO2 lithium-philic layer and the metal silver conductive layer, the stability of a Cu-O skeleton and the chemical stability, conductivity and safety of the material can be maintained in the intercalation and deintercalation process of lithium ions, so that the lithium ion battery has a relatively longservice life and cycle capacity retention ratio.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, and in particular relates to a doped cuprous oxide lithium-ion battery negative electrode material, a preparation method, an application thereof, and a lithium-ion battery. Background technique [0002] Lithium-ion batteries have become the most widely used secondary batteries in the 21st century, especially in the past ten years, lithium-ion batteries have been widely used in the field of hybrid batteries and pure electric vehicles. The anode material used in lithium-ion batteries manufactured in the prior art is mainly graphite anode. In addition to high capacity and stable properties, graphite anode material is also one of the important factors for its wide application due to its low price. In addition, metal oxides have been extensively studied and applied as anode materials for lithium-ion batteries, mainly due to cost and performance factors. Main metal oxides include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62H01M10/0525C01G3/02
CPCH01M4/483H01M4/62H01M4/626H01M10/0525C01G3/02C01P2004/80Y02E60/10
Inventor 蒋贝贝马佳丽聂航赵双琪林定文张文博丁先红舒涛聂红明周环波
Owner HUBEI UEE ENERGY TECH CO LTD
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