Array carbon nano-tube/carbon fiber-based flexible composite electrode material and preparation method thereof

A carbon nanotube and composite electrode technology, which is applied in the directions of carbon fiber, fiber processing, circuits, etc., can solve the problems of poor capacitance performance, power characteristics and frequency response characteristics of array carbon nanotube/carbon fiber-based flexible composite electrode materials that have not yet been seen. Affect the supercapacitor rate performance and other issues, and achieve the effects of good cycle stability and mechanical properties, excellent rate performance, and excellent electrochemical performance.

Active Publication Date: 2012-02-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to get rid of some inherent defects in the application of this activated carbon electrode in supercapacitors: since the activated carbon electrode is a microporous material, its pore size is less than 2 nm (Huang CW, Chuang CM, Ting JM, et al. Significantly enhanced charge conduction in electric double layer capacitors using carbon nanotube-grafted activated carbon electrodes. J Power Sources. 2008;183(1):406-10.), this narrow gap will create a large obstacle when the electrolyte particles are inserted into and out of the electrode, Especially at high current density, the transmission resistance

Method used

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  • Array carbon nano-tube/carbon fiber-based flexible composite electrode material and preparation method thereof
  • Array carbon nano-tube/carbon fiber-based flexible composite electrode material and preparation method thereof
  • Array carbon nano-tube/carbon fiber-based flexible composite electrode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] Put a three-dimensional carbon fiber braid with a plane size of 2cm×2cm and a thickness of 0.2cm in a tube-type high-temperature furnace. 3 After the air in the tube is exhausted by argon gas at a flow rate of / min, the temperature of the furnace tube is raised to 800°C, and after 1 hour of heat preservation, it is taken out after being lowered to room temperature under the protection of argon gas. Soak the treated three-dimensional carbon fiber braid in a mixed solution of 0.46g tetraethyl orthosilicate, 0.74g silicon tetrachloride and 16.34g xylene for 10 minutes. It was then exposed to water vapor for 10 minutes and then dried under vacuum at a temperature of 60°C. After drying, put the three-dimensional carbon fiber braided body into a high-temperature tube furnace again, at a gas flow rate of 300 cm 3 / min under the protection of argon to raise the temperature to 1000°C, keep the temperature for 10 minutes, and then drop to room temperature under the protection of...

Embodiment 2

[0029] Put a three-dimensional carbon fiber braid with a plane size of 2cm×2cm and a thickness of 0.2cm in a tube-type high-temperature furnace. 3 After removing the air in the tube with argon gas at a flow rate of / min, the temperature of the furnace tube was raised to 850°C, and after 2 hours of heat preservation, it was taken out after falling to room temperature under the protection of argon gas. Soak the treated three-dimensional carbon fiber braid in a mixed solution of 0.46g tetraethyl orthosilicate, 0.74g silicon tetrachloride and 16.34g xylene for 10 minutes. It was then exposed to water vapor for 10 minutes and then dried under vacuum at a temperature of 60°C. After drying, put the three-dimensional carbon fiber braided body into a high-temperature tube furnace again, at a gas flow rate of 300 cm 3 / min under the protection of argon to raise the temperature to 1000°C, keep the temperature for 10 minutes, and then drop to room temperature under the protection of argon...

Embodiment 3

[0033] Put a three-dimensional carbon fiber braid with a plane size of 2cm×2cm and a thickness of 0.2cm in a tube-type high-temperature furnace. 3 After removing the air in the tube with argon gas at a flow rate of / min, the temperature of the furnace tube was raised to 900°C, and after 1 hour of heat preservation, it was taken out after being lowered to room temperature under the protection of argon gas. Soak the treated three-dimensional carbon fiber braid in a mixed solution of 0.46g tetraethyl orthosilicate, 0.74g silicon tetrachloride and 16.34g xylene for 10 minutes. It was then exposed to water vapor for 10 minutes and then dried under vacuum at a temperature of 60°C. After drying, put the three-dimensional carbon fiber braided body into a high-temperature tube furnace again, at a gas flow rate of 300 cm 3 / min under the protection of argon to raise the temperature to 1000°C, keep the temperature for 10 minutes, and then drop to room temperature under the protection of...

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Abstract

The invention discloses an array carbon nano-tube/carbon fiber-based flexible composite electrode material and a preparation method thereof. The composite material takes a three-dimensional carbon fiber woven body as a substrate, a carbon nano-tube array is grown on the substrate, and nano-scale manganese dioxide particles are deposited on the surface. The preparation process comprises the following steps: performing high-temperature treatment on the three-dimensional carbon fiber woven body under the protection of inert gas; wrapping a layer of nano-scale silicon dioxide on the surface of the carbon fiber; using a chemical vapor deposition method to grow the carbon nano-tube array on the surface of the three-dimensional carbon fiber woven body; and utilizing a constant current electrochemical deposition method to uniformly deposit nano-scale manganese dioxide on an array carbon nano-tube/carbon fiber composite body. The process is simple, and the prepared flexible composite electrode has the advantages of developed conductive network, porous structure, large specific surface area, higher utilization rate of active substances, excellent mechanical strength and excellent chemical stability, thus the composite material provided by the invention is an ideal material for the high-performance large-capacity supercapacitor flexible electrode.

Description

technical field [0001] The invention relates to an array carbon nanotube / carbon fiber-based flexible composite electrode material and a preparation method thereof, belonging to energy storage material technology. Background technique [0002] With the development of science and technology and society, many occasions such as electric vehicles, instant power supply, mobile communication, national defense and military industry have greatly increased the power requirements, which have far exceeded the capacity of the battery. Although traditional capacitors can provide very large power, their energy density is extremely limited and cannot meet actual needs. As a new type of energy storage device between batteries and traditional dielectric capacitors, supercapacitors have the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection, making them have both high specific energy and High specific power c...

Claims

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Application Information

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IPC IPC(8): H01G9/042D06M11/74D06M11/79D06M101/40
CPCY02E60/13
Inventor 封伟张鹏冯奕钰吕鹏
Owner TIANJIN UNIV
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