Oriented carbon nanotube/polymer composite film and its preparation method and application

A technology of oriented carbon nanotubes and carbon nanotubes, applied in the field of lithium ion batteries, can solve problems such as unfavorable lithium intercalation and deintercalation, and achieve the effect of excellent electrical conductivity

Active Publication Date: 2011-11-30
宁国市龙晟柔性储能材料科技有限公司
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Problems solved by technology

However, the random accumulation of carbon tubes is not conducive to lithium intercalation and deintercalation. How to effectively play the role of carbon tubes in lithium-ion batteries has become a direction that has attracted widespread attention[4][5]

Method used

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  • Oriented carbon nanotube/polymer composite film and its preparation method and application
  • Oriented carbon nanotube/polymer composite film and its preparation method and application
  • Oriented carbon nanotube/polymer composite film and its preparation method and application

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Experimental program
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Embodiment Construction

[0028] The specific process of preparation is as follows:

[0029] First, the synthesis of aligned carbon nanotube arrays.

[0030] Vertically grown carbon nanotube arrays with Fe(1nm) / Al 2 o 3 (10nm) / SiO 2 / Si as a catalyst was synthesized using typical chemical vapor deposition in a quartz tube of a tube furnace. Al in the catalyst 2 o 3 It is located in the middle of the silicon wafer and Fe, as a buffer layer, and Fe as a catalyst, which are prepared by depositing a nanometer-thick film on a silicon wafer by an electron beam evaporation coating device. Using chemical vapor deposition method, ethylene is used as carbon source, argon and hydrogen are used as carrier gas, and highly oriented carbon nanotube arrays are synthesized on Si substrate with oxide layer. The details of the synthesis and the self-assembly of carbon tubes in fibers can be referred to the existing literature reports.

[0031] Second, preparation of embedding stock solution.

[0032] The formula ...

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Abstract

The invention belongs to the technical field of lithium ion batteries and in particular relates to a CNT (carbon nano tube)/polymer composite membrane as well as a preparing method and an application thereof. The composite membrane is prepared by taking an epoxy resin embedding solution, a flexibilizer and a CNT array as raw materials and then carrying out curing, compounding and slicing on the raw materials. CNTs in the composite membrane are distributed evenly, thus the upper and lower surfaces of the composite membrane have good electrical conductivity and also have good flexibility and strength; and the surfaces of the composite membrane are provided with a large number of opened tail ends of the CNTs, and the composite membrane can be applied to lithium ion batteries widely due to the highly oriented structures of the opened tail ends. The vertically-oriented CNT/polymer composite membrane is applied to buckled lithium ion batteries and polymer lithium ion batteries and also suitable for other types of lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a carbon nanotube / polymer composite film and a preparation method and application thereof. Background technique [0002] The discovery of carbon nanotubes is a milestone in the history of world science. Since the discovery of carbon nanotubes (Carbon Nanotubes, CNTs) by Iijima in Japan in 1991 [1], carbon nanotubes have been characterized by their unique high tensile strength, high elasticity, electronic properties from metal to semiconductor, high current load capacity and high thermal conductivity. As well as the unique quasi-one-dimensional tubular molecular structure, it has many potential application values ​​in the future high-tech field and has become the focus of attention. Carbon nanotubes have been widely studied to be added to polymers to prepare composite materials, but because carbon nanotubes are randomly distributed in polymers, the pract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/0525
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 彭慧胜仰志斌李立任婧
Owner 宁国市龙晟柔性储能材料科技有限公司
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