Preparation method of porous current collector/tin-base alloy/carbon nano-tube integrated electrode

A technology of porous current collectors and carbon nanotubes, used in battery electrodes, circuits, electrical components, etc., can solve the problems of easy agglomeration, pulverization, shedding, and electrode capacity decay of active materials, and achieve excellent electrochemical performance. Contact area, the effect of simplifying the synthesis process

Inactive Publication Date: 2011-09-14
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is a preparation method of a porous current collector/tin-based alloy/carbon nanotube integrated electrode, which can overcome the easy aggregation, pulverization and falling off of the active material

Method used

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  • Preparation method of porous current collector/tin-base alloy/carbon nano-tube integrated electrode
  • Preparation method of porous current collector/tin-base alloy/carbon nano-tube integrated electrode
  • Preparation method of porous current collector/tin-base alloy/carbon nano-tube integrated electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) For the preparation of porous copper current collectors, configure the electrolyte according to the following formula:

[0016]

[0017] At room temperature, both the anode and the working electrode are copper sheets, and the current density is 0.1A / cm 2 , electroplating for 10 min to obtain a porous copper current collector.

[0018] (2) Preparation of porous current collector / tin-based alloy / carbon nanotube integrated electrode

[0019] 1) Prepare tin-cobalt alloy electroplating solution, the process formula is as follows:

[0020]

[0021] Adjust the pH to 5 with ammonia and hydrochloric acid.

[0022] 2) Add carbon nanotubes to the above plating solution, the concentration of carbon nanotubes is 0.6g / L.

[0023] 3) Titanium mesh is used as the anode, the porous copper current collector is used as the cathode, the working temperature is 45°C, and the current density is 0.5A / dm 2 , deposition time 10min. Finally, a porous current collector / tin-based all...

Embodiment 2

[0025] (1) For the preparation of porous copper current collectors, configure the electrolyte according to the following formula:

[0026]

[0027] At room temperature, both the anode and the working electrode are copper sheets, and the current density is 0.3A / cm 2 , electroplating for 15 minutes to obtain a porous copper current collector.

[0028] (2) Preparation of porous current collector / tin-based alloy / carbon nanotube integrated electrode

[0029] 1) Prepare tin-cobalt alloy electroplating solution, the process formula is as follows:

[0030]

[0031] Adjust the pH to 12 with ammonia and hydrochloric acid.

[0032] 2) Add carbon nanotubes to the above plating solution, the concentration of carbon nanotubes is 1g / L.

[0033] 3) Titanium mesh is used as the anode, the porous copper current collector is used as the cathode, the working temperature is 45°C, and the current density is 0.6A / dm 2 , deposition time 10min. Finally, a porous current collector / tin-based ...

Embodiment 3

[0035] (1) For the preparation of porous copper current collectors, configure the electrolyte according to the following formula:

[0036]

[0037] At room temperature, the pulse electrodeposition preparation technology is adopted, the anode and the working electrode are copper sheets, and the current density is 0.5A / cm 2 , electroplating for 10 min to obtain a porous copper current collector.

[0038] (2) Preparation of porous current collector / tin-based alloy / carbon nanotube integrated electrode

[0039] 1) Prepare tin-cobalt alloy electroplating solution, the process formula is as follows:

[0040]

[0041] Adjust the pH to 8 with ammonia and hydrochloric acid.

[0042] 2) Add carbon nanotubes to the above plating solution, the concentration of carbon nanotubes is 2g / L; in addition, add cetyltrimethylammonium bromide, the concentration is 0.1g / L.

[0043] 3) Titanium mesh is used as the anode, the porous copper current collector is used as the cathode, the working ...

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Abstract

The invention relates to the preparation of an electrode material, and discloses a preparation method of a porous current collector/tin-base alloy/carbon nano-tube integrated electrode. The integrated electrode can be applied to a negative electrode of a lithium ion battery. The preparation method comprises the following steps of: preparing a porous current collector by adopting a hydrogen bubbletemplate method; and then, depositing tin-base alloy and a carbon nano-tube on the porous current collector by adopting a composite electrodeposition method to obtain the porous current collector/tin-base alloy/carbon nano-tube integrated electrode.

Description

technical field [0001] The invention relates to the preparation of electrode materials, in particular to a preparation method of a porous current collector / tin-based alloy / carbon nanotube integrated electrode, which can be applied to the negative electrode of a lithium ion battery. Background technique [0002] Because of its high energy density, high voltage, small self-discharge, long cycle life, and no memory effect, lithium-ion batteries have been widely used in portable devices such as mobile phones, notebook computers, and digital cameras, and are also used in electric vehicles and other fields. Show great application prospects. [0003] At present, the commercial lithium-ion battery negative electrode mainly uses graphite material, but the theoretical specific capacity of graphite negative electrode (372 mAh·g -1 ) is low, which can no longer meet the growing demand for power in the fields of modern electronic products and power equipment; therefore, it is necessary ...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/1395
CPCY02E60/122Y02E60/10
Inventor 樊小勇李东林王晶晶李严李倩陆晓挺张红霞
Owner CHANGAN UNIV
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