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Membrane electrode based on spiral carbon nanofiber bundle and preparation method thereof

A technology of carbon nanofiber bundles and carbon nanofibers, applied in the field of thin film electrodes based on helical carbon nanofiber bundles and its preparation, to achieve the effects of convenient operation, easy large-scale industrial production, and good electrochemical cycle stability

Inactive Publication Date: 2012-01-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another example is in the literature (2) Chem. Mater., 2007, 19: 4198-4204, Da Deng et al. used a simple one-step reaction method, using acetylene as a reactant, and prepared carbon nanofibers on a copper substrate at 950 ° C. However, the material has a specific capacity of only 260mAh / g at a current density of 100mA / g

Method used

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  • Membrane electrode based on spiral carbon nanofiber bundle and preparation method thereof
  • Membrane electrode based on spiral carbon nanofiber bundle and preparation method thereof
  • Membrane electrode based on spiral carbon nanofiber bundle and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Cut a copper foil with a thickness of 10 μm into a shape of 2cm×4cm, ultrasonically clean it in ethanol for 10 minutes, immerse it in 20mL ethanol solution containing 0.4g nickel nitrate for 5 minutes, and then dry it in an oven at 50°C for 3 hours. Repeat the above steps for 3 Second, nickel-based catalyst particles are loaded on the surface of copper foil; the copper foil loaded with nickel-based catalyst particles is placed in the high temperature zone of the dual temperature zone tube furnace, and camphor is placed in the low temperature zone of the dual temperature zone tube furnace as a solid carbon source , after sealing the dual temperature zone tube furnace, nitrogen gas is introduced at a flow rate of 50mL / min along the direction from the low temperature zone to the high temperature zone to form an inert gas protective atmosphere in the dual temperature zone tube furnace; The high temperature zone is heated to 760°C, and then the low temperature zone of the dua...

Embodiment 2

[0030] Cut a copper foil with a thickness of 30 μm into a shape of 2cm×4cm, ultrasonically clean it in ethanol for 20 minutes, immerse it in 20mL ethanol solution containing 0.5g nickel nitrate for 4 minutes, and then dry it in an oven at 60°C for 2 hours. Repeat the above steps for 4 Second, nickel-based catalyst particles are loaded on the surface of copper foil; the copper foil loaded with nickel-based catalyst particles is placed in the high temperature zone of the dual temperature zone tube furnace, and camphor is placed in the low temperature zone of the dual temperature zone tube furnace as a solid carbon source , after sealing the dual-temperature-zone tube furnace, argon gas is introduced at a flow rate of 40 mL / min along the direction from the low-temperature zone to the high-temperature zone to form an inert gas protective atmosphere in the dual-temperature zone tube furnace; the dual-temperature zone tube furnace The high temperature zone is heated up to 600°C, and ...

Embodiment 3

[0033] Cut a copper foil with a thickness of 20 μm into a shape of 2cm×4cm, ultrasonically clean it in ethanol for 14 minutes, immerse it in 20mL ethanol solution containing 0.6g nickel nitrate for 3 minutes, and then dry it in an oven at 70°C for 1 hour. Repeat the above steps for 5 Second, nickel-based catalyst particles are loaded on the surface of copper foil; the copper foil loaded with nickel-based catalyst particles is placed in the high temperature zone of the dual temperature zone tube furnace, and camphor is placed in the low temperature zone of the dual temperature zone tube furnace as a solid carbon source , after sealing the dual-temperature zone tube furnace, feed nitrogen gas at a flow rate of 60 mL / min along the direction from the low temperature zone to the high temperature zone, and form an inert gas protective atmosphere in the dual temperature zone tube furnace; The high-temperature zone is heated to 650°C, and then the low-temperature zone of the dual-tempe...

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Abstract

The invention discloses a membrane electrode based on a spiral carbon nanofiber bundle and a preparation method thereof, belonging to the technical field of lithium ion batteries. The membrane electrode comprises a copper coil current collector and the spiral carbon nanofiber bundle growing on the surface of the copper coil current collector, wherein the spiral carbon nanofiber bundle is formed by spirally winding a plurality of carbon nanofibers, and a graphite layer of the carbon nanofibers is vertical to the axial direction of the carbon nanofibers. The preparation method of the membrane electrode comprises the following steps: loading a nickel-based catalyst on the surface of a copper coil; and then growing the spiral carbon nanofiber bundle on the surface of the copper coil by adopting a chemical vapor deposition method. The membrane electrode and the preparation method provided by the invention have the advantages that the unique structure of the membrane electrode enables the membrane electrode to have higher reversible specific capacity, good electrochemical cycle stability and higher multiplying power performance; and the preparation technology is simple, convenient to operate, and easy to implement large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a thin film electrode based on helical carbon nanofiber bundles and a preparation method thereof. Background technique [0002] As an anode material for lithium-ion batteries, graphite has the advantages of low cost, high cycle efficiency and good electrochemical cycle stability. However, its lithium storage capacity is low, and its theoretical specific capacity is 372mAh / g. Therefore, the development of new negative electrode materials has become the key to improving the performance of lithium-ion batteries. [0003] In recent years, people have studied a variety of carbon materials, among which carbon nanomaterials (such as carbon nanotubes, graphene, carbon nanofibers, etc.) have the advantages of high specific capacity and good stability, and are considered to be very promising. A new generation of lithium-ion battery anode materials. [0004] Carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/1393
CPCY02E60/122Y02E60/10
Inventor 杨文胜任佳楠孙洁
Owner BEIJING UNIV OF CHEM TECH
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