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Preparation method of foamy copper/carbon nanophase composite negative electrode material for lithium ion battery

An ion battery and negative electrode material technology is applied in the field of preparation of lithium ion battery electrodes, and achieves the effects of low cost, simple preparation process, and easy realization and promotion.

Inactive Publication Date: 2013-03-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no preparation method for directly growing carbon nanophase negative electrode materials on foamed copper by chemical vapor deposition. With this preparation method, a continuous three-dimensional conductive network is formed inside the electrode material, which can save the addition of binders and can Realize the uniform dispersion of carbon nanophase and optimize the process parameters of CVD synthesis of carbon nanomaterials

Method used

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  • Preparation method of foamy copper/carbon nanophase composite negative electrode material for lithium ion battery
  • Preparation method of foamy copper/carbon nanophase composite negative electrode material for lithium ion battery
  • Preparation method of foamy copper/carbon nanophase composite negative electrode material for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 10g of NaCl particles were milled for 60min at a ball-to-material ratio of 20:1, at a rotational speed of 500rpm, to obtain NaCl particles with an average particle size of 40μm, and 2.41g of NaCl particles with a particle size of 40μm were mixed with 10g of electrolytic copper powder and 5mL of absolute ethanol. Put it into a V-type drum mixer, the speed is 80r / min, the mixing time is 3h, and then take the mixture of 30mgNaCl and copper powder and put it into a press with a size of Φ12 × 0.14mm 3 In the die, pressurize to 300MPa in one direction to obtain the billet. Put the billet prepared above in a tube furnace, under the protective atmosphere of argon, raise the temperature to 760°C at a rate of 10°C / min, hold the time for 2h, then heat it up to 940°C for 3h, also with Cool down to room temperature with the furnace at a cooling rate of 10°C / min. Take out the sample and place it in a circulating hot water device at 80°C to dissolve NaCl, then place it in an oven and...

Embodiment 2

[0038] 10g of NaCl particles were milled for 90 minutes at a ball-to-material ratio of 20:1, at a speed of 300 rpm, to obtain NaCl particles with an average particle size of 70 μm. Take 3.62 g of NaCl particles with a particle size of 70 μm and 10 g of electrolytic copper powder with a particle size of 200 mesh and Put 6mL of absolute ethanol into a V-shaped drum mixer with a rotation speed of 80r / min and a mixing time of 2h, then take a mixture of 38mgNaCl and copper powder and fill it with a size of Φ12×0.20mm 3 In a pressing die, the blank was obtained by unidirectionally pressing to 300MPa. Put the billet prepared above in a tube furnace, and in a protective atmosphere of argon, raise the temperature to 750°C at a rate of 10°C / min, hold for 2h, then raise the temperature to 950°C for 3h, the same with Cool down to room temperature with the furnace at a cooling rate of 10°C / min. Take out the sample and place it in a circulating hot water device at 80°C to dissolve the NaCl...

Embodiment 3

[0042] 10g of NaCl particles were milled for 90 minutes at a ball-to-material ratio of 20:1, at a speed of 400 rpm, to obtain NaCl particles with an average particle size of 60 μm. Take 5.60 g of NaCl particles with a particle size of 60 μm and 10 g of electrolytic copper powder with a particle size of 200 mesh and Put 6mL of absolute ethanol into a V-shaped drum mixer with a rotation speed of 80r / min and a mixing time of 4h, then take a mixture of 46mg of NaCl and copper powder and fill it with a size of Φ12 × 0.34mm 3 In a pressing die, pressurize unidirectionally to 300MPa to obtain a billet. Place the billet prepared above in a tube furnace, and in a protective atmosphere of argon, raise the temperature to 740°C at a rate of 8°C / min for a holding time of 3h, and then heat it up to 940°C for 1.5h. Cool down to room temperature with the furnace at a cooling rate of 10°C / min. The sample was taken out and placed in a circulating hot water device at 50°C to dissolve the NaCl p...

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Abstract

The invention discloses a preparation method of a foamy copper / carbon nanophase composite negative electrode material for a lithium ion battery. The method comprises the steps that the foamy copper is obtained through the processes of mixing NaCl particles and electrolytic copper powder, briquetting the mixture into blanks, sintering the blanks, dissolving out the NaCl particles and reducing under the protection of hydrogen; the foamy copper loaded with a catalyst precursor is obtained by immersing the foamy copper in a catalyst solution prepared by nickel nitrate, yttrium nitrate or cobalt nitrate and calcining the foamy copper loaded with the catalyst; and the foamy copper / carbon nanophase composite electrode material is obtained via reduction of the foamy copper loaded with a catalyst precursor and growth in acetylene. The method is advantageous in that foamy copper with controllable porosity and aperture is employed as a current collector; and carbon nanophase with different morphologies which has good quality and high purity is grown on the foamy copper current collector directly by controlling doping and growing processes of the catalyst. The method is simple in preparation process, and is easy to realize and popularize. The composite negative electrode material has low preparation cost and good electrochemical performance.

Description

technical field [0001] The invention relates to a method for preparing a foamed copper / carbon nanophase composite lithium-ion battery negative electrode material, which belongs to the preparation technology of lithium-ion battery electrodes. Background technique [0002] As a kind of green energy, lithium-ion battery has the advantages of high energy density, high working voltage, wide working temperature range, long cycle life, no memory effect, light weight, etc. It is widely used in portable electrical appliances, electric vehicle industry, military equipment and aerospace industry etc. The negative electrode material of lithium-ion batteries is one of the important factors affecting battery performance, which determines the capacity and cycle performance of lithium-ion batteries. At present, the commercial lithium-ion battery anode materials are mainly graphitized carbon materials, and carbon nanomaterials such as carbon nanotubes (CNTs) and carbon nanofibers (CNFs) ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/583
CPCY02E60/12Y02E60/10
Inventor 师春生孟迪赵乃勤刘恩佐何春年
Owner TIANJIN UNIV
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