Composite nano carbon-base film electrode and use therefor

A nano-carbon-based thin-film and composite thin-film technology, applied in fixed capacitor electrodes, fixed capacitor parts, coatings, etc., can solve the problems of complicated carbon nanotube technology, not suitable for mass production, and difficult to guarantee repeatability, etc. Achieve excellent ion adsorption performance, reduce energy consumption, manufacture and use costs, simplify the structure and preparation process

Active Publication Date: 2006-05-24
上海纳晶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of carbon aerogels and activated carbon materials for capacitive deionized water has varying degrees of disadvantages in the commercialization process: carbon aerogels are difficult to promote in the field of desalination due to their high preparation costs
Resin and carbon nanotubes are mixed, the resistance of the electrode is higher, and the energy consumption is increased
At the same time, the process of processing carbon nanotubes is complicated, the cost is high, and the repeatability is difficult to guarantee, so it is not suitable for the requirements of mass production.

Method used

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  • Composite nano carbon-base film electrode and use therefor
  • Composite nano carbon-base film electrode and use therefor
  • Composite nano carbon-base film electrode and use therefor

Examples

Experimental program
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Effect test

example 1

[0031]A capacitor unit is used, and the electrode is a carbon nanotube and fiber composite film grown on a Ni sheet with a diameter of 85 mm, and the number of electrodes used is 2. The solution to be treated was 30ml of NaCl solution with an initial conductivity of 50 μS / cm, and the NaCl solution was circulated by a constant flow pump. The applied voltage is U=1.2V. image 3 It is shown that with the increase of electrification time, the conductivity of the solution decreases, indicating that the capacitive device has a deionization effect on NaCl solution. After 45 minutes of electrification, the electrode was short-circuited and discharged, and the conductivity of the solution increased. After 100 minutes, the conductivity returned to the initial value before electrification, indicating that the adsorbed ions were completely desorbed and the electrode was regenerated.

example 2

[0033] A capacitor unit is used, and the electrode is a carbon nanotube and fiber composite film grown on a Ni sheet with a diameter of 85 mm, and the number of electrodes used is 2. The solution to be treated was 30ml of NaCl solution with an initial conductivity of 50 μS / cm, and the NaCl solution was circulated by a constant flow pump. Power on for a period of t1=15 minutes at U=1.2V, then short circuit, when the conductivity is close to the initial value before power on, power on again for a period of t2=20 minutes, then short circuit, the conductivity still returns to the initial value before power on. Figure 4 The change of the conductivity of the solution with the increase of electrification time is given. From Figure 4 It is obvious that the nano-carbon-based thin film electrodes used in the present invention can be reused.

example 3

[0035] A capacitor unit is used, and the electrode is a carbon nanotube and fiber composite film grown on a Ni sheet with a diameter of 85 mm, and the number of electrodes used is 2. The solution to be treated was 30ml of NaCl solution with an initial conductivity of 50 μS / cm, and the NaCl solution was circulated by a constant flow pump. Under different voltages U=0.4V, 0.6V, 0.8V, 1.0V, 1.2V, 2.0V, the same time t=20 minutes. Figure 5 The decrease trend of the conductivity of the solution is given with the increase of electrification time. It can be seen that within the applied voltage range, as the voltage increases, the capacitive deionization efficiency increases. When U=2.0V, the capacitive deionization efficiency reaches 50%, and when U=1.2V, the capacitive deionization efficiency also reaches 40%. When U=2.0V, no water decomposition was observed. The theoretical decomposition voltage of water is 1.23V. Considering the voltage drop caused by the impedance inside the ...

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Abstract

Comparing with prior art, the invention prepares electrode of capacitor from composite Nano carbon base film. Structure of device and preparing technique are simplified. Resistance of electrode material is small, and operating voltage is small so as to lower energy consumption and cost greatly. The said composite Nano carbon base film is composite material composed of Nano carbon tubes and Nano carbon fibers. The composite material is key material for the electrode. Capacitor made from the disclosed electrode is new generation of energy storage device. Advantages are: high efficiency of ionic adsorption, thin and light, low power consumption, quick response speed, and reusable.

Description

[technical field] [0001] The invention relates to the fields of energy storage, ion adsorption devices and water treatment, in particular to a composite nano-carbon-based film electrode and its application. [Background technique] [0002] There is no doubt about the importance of water to living organisms. The increasing scarcity of water resources in the world has led people to use seawater desalination to ask for water from the ocean. Water is also used industrially as a cleaning agent, solvent, diluent, refrigerant, and reactant; how much ions dissolve in water is important for industrial applications, for example, ions in ultrapure water used in nuclear power plants and semiconductor chip production Quantity should be strictly controlled to ensure stable production and high-quality products. [0003] Many deionization processes have been used to desalinate brackish water and produce high-purity water. The classic water deionization process includes distillation (evapor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/005C01B31/02C02F1/28C23C16/26H01G4/008
Inventor 孙卓王新征
Owner 上海纳晶科技有限公司
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