Preparation method of nano-cu@cuo material and its application in lithium-ion battery

A nano and copper nano technology is applied in the fields of energy materials and electrochemistry to achieve the effects of simple preparation method and equipment, abundant raw materials and high repeatability

Active Publication Date: 2019-06-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the current research, there are many reports on the combination of CuO and carbon-based materials with good conductivity, but there are few reports on the formation of composite electrode materials with nano-metal copper, especially the use of hydrothermal methods, using copper nanosheets as reaction templates, The study of obtaining nano-Cu@CuO electrode materials has not been reported yet

Method used

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  • Preparation method of nano-cu@cuo material and its application in lithium-ion battery
  • Preparation method of nano-cu@cuo material and its application in lithium-ion battery
  • Preparation method of nano-cu@cuo material and its application in lithium-ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Stir 0.4 g of glucose, 0.2 g of polyvinylpyrrolidone, and 15 mL of deionized water at room temperature for 4 h to obtain a clear mixture. Add 0.8mmoL of copper sulfate solution to it, stir for 1h, transfer to a hydrothermal reaction kettle and react at 160°C for 4h, centrifuge the product, wash it three times with deionized water and absolute ethanol successively, and put the obtained product in a vacuum drying oven dry to obtain copper nanosheets. 0.025g of copper nanosheets, 10g of water, 0.16g of sodium hydroxide, and 0.16g of 30% hydrogen peroxide were placed in a reaction kettle and stirred for 1min, and kept in an oven at 110°C for 6h. The obtained product was centrifuged, washed with deionized water and absolute ethanol in sequence, and vacuum-dried at 50°C to obtain nano-Cu@CuO material powder.

[0029] The prepared 75 wt.% nano-Cu@CuO material, 15 wt.% acetylene black and 10 wt.% PVDF were mixed evenly to make a slurry, which was evenly coated on the copper fo...

Embodiment 2

[0031] Stir 1 g of glucose, 0.6 g of polyvinylpyrrolidone and 20 mL of deionized water at room temperature for 4 h to obtain a clear mixture. Add 1mmoL of copper sulfate solution to it, stir for 1h, transfer to a hydrothermal reaction kettle and react for 3h at 170°C, centrifuge the product, wash it three times with deionized water and absolute ethanol successively, and put the obtained product in a vacuum drying oven Dry to obtain copper nanosheets. 0.03g of copper nanosheets, 6g of water, 0.2g of sodium hydroxide, and 0.3g of 30% hydrogen peroxide were placed in a reaction kettle and stirred for 1min, and kept in an oven at 110°C for 8h. The obtained product was centrifuged, washed with deionized water and absolute ethanol in sequence, and vacuum-dried at 50°C to obtain nano-Cu@CuO material powder.

[0032] The prepared 75 wt.% nano-Cu@CuO material, 15 wt.% acetylene black and 10 wt.% PVDF were mixed evenly to make a slurry, which was evenly coated on the copper foil, and t...

Embodiment 3

[0034]1.5 g of glucose, 1 g of polyvinylpyrrolidone and 45 mL of deionized water were stirred at room temperature for 4 h to obtain a clear mixture. Add 1.8mmoL of copper sulfate solution to it, stir for 1h, then transfer to a hydrothermal reaction kettle and react for 4.5h at 180°C. The product is centrifuged, washed three times with deionized water and absolute ethanol successively, and the obtained product is dried in vacuum. Dry in an oven to obtain copper nanosheets. 0.04g of copper nanosheets, 10g of water, 0.3g of sodium hydroxide, and 0.5g of 30% hydrogen peroxide were placed in a reaction kettle and stirred for 3 minutes, and kept in an oven at 110°C for 12 hours. The obtained product was centrifuged, washed with deionized water and absolute ethanol in sequence, and vacuum-dried at 60°C to obtain nano-Cu@CuO material powder.

[0035] The prepared 75 wt.% nano-Cu@CuO material, 15 wt.% acetylene black and 10 wt.% PVDF were mixed evenly to make a slurry, which was evenl...

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Abstract

The invention discloses a preparation method for a nanometer Cu@CuO material and a lithium ion battery using the nanometer Cu@CuO material as a negative electrode material, belonging to the field of energy materials. According to the invention, a hydro-thermal reaction process is employed; sodium hydroxide provides an alkaline environment; hydrogen peroxide is used as an oxygen source; and the nanometer Cu@CuO negative electrode material is prepared through slow etching of a two-dimensional copper nanosheet. The preparation method is simple in process and equipment, controllable in technological parameters, mild in conditions and high in repeatability; raw materials used in the preparation method are widely available and low cost, so the preparation method can easily realize large-scale production; and the prepared nanometer Cu@CuO negative electrode material has high specific capacity and good cycle stability, is an ideal lithium ion battery negative electrode material and be extensively applied to fields like portable electronic equipment, electric tools, space technology and national defense industries.

Description

technical field [0001] The invention belongs to the field of energy materials and electrochemistry, and in particular relates to the preparation of a novel lithium-ion battery negative electrode material and its storage and conversion in electrochemical energy. Background technique [0002] With the increasing demand for energy, the reduction of fossil fuel reserves and the aggravation of environmental pollution, the development of clean and efficient new energy has become a focus of attention. As an energy storage device, lithium-ion batteries have been used more and more due to their advantages of environmental protection, light weight, high capacity, and long life. Not only can it be applied to various portable electronic devices, but also has a great application prospect as the power source of electric vehicles and energy storage devices of new energy such as solar energy and wind energy. In recent years, the development of electric equipment has put forward higher requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M10/0525Y02E60/10
Inventor 王戈党蕊刘丽萍杨琼王芃刘欣贾希来高鸿毅
Owner UNIV OF SCI & TECH BEIJING
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