Application of carbon nanofiber and metal composite electrode in flow battery

A nano-carbon fiber and metal composite technology, applied in battery electrodes, regenerative fuel cells, circuits, etc., can solve the problems of high electrode cost and unsuitable for large-scale application, achieve low price, improve electrocatalytic activity and electrochemical reversibility , the effect of fewer processes

Inactive Publication Date: 2016-07-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(2) Metallize electrode materials such as graphite felt, carbon paper, etc., that is, modify metal ions on the surface of carbon fibers, such as Sun et al. (Sun, B.T.; .) Modified Mn on the carbon fiber surface 2+ 、 Te 4+ 、In 3+ and Ir 3+ etc., found Ir 3+ It is most effective in improving the electrocatalytic activity of electrode materials, but due to the high cost of electrodes due to the use of noble metals, it is not suitable for large-scale applications

Method used

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  • Application of carbon nanofiber and metal composite electrode in flow battery
  • Application of carbon nanofiber and metal composite electrode in flow battery
  • Application of carbon nanofiber and metal composite electrode in flow battery

Examples

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Embodiment 1

[0031] Weigh 0.5gBi(NO 3 ) 3 ·5H 2 Dissolve O in 20g of N,N-dimethylformamide, ultrasonically disperse for 1h to dissolve completely, then add 2g of polyacrylonitrile powder, stir at 70°C for 24h to fully dissolve. Then, 5 mL of the above solution was placed in a syringe, and spinning was carried out under the conditions of 10KV voltage, 25° C., and 10% relative humidity, and the distance between the needle tip of the syringe and the receiving plate was 5 cm. The obtained polymer fiber / metal salt composite film was pre-oxidized in air at 300°C for 2h, then sintered at 1200°C for 2h under argon atmosphere, the metal salt in it was reduced to metal, and then cooled to room temperature to prepare carbon nanofibers / Bi composite electrode material. Such as figure 1 As shown, the SEM image of the carbon nanofiber / metal composite electrode material shows that it is made of interlaced carbon nanofibers. The diameter of the carbon nanofibers is about 200nm. A large number of nanos...

Embodiment 2

[0034] Weigh 0.4gPb(NO 3 ) 2Dissolve in 20g of N,N-dimethylformamide, ultrasonically disperse for 1h to dissolve completely, then add 3g of polymethyl methacrylate powder, stir at 50°C for 24h to fully dissolve. Then, 10 mL of the above solution was placed in a syringe, and spinning was carried out under the conditions of 15KV voltage, 25° C., and a relative humidity of 20%, and the distance between the needle tip of the syringe and the receiving plate was 5 cm. The obtained polymer fiber / metal salt composite film was pre-oxidized in air at 280 °C for 2 h, and then sintered at 1400 °C for 2 h under an argon atmosphere, the metal salt in it was reduced to metal Pb, and then cooled to room temperature to obtain nano Carbon fiber / Pb composite electrode material. The diameter of carbon nanofibers in the obtained carbon nanofiber film is about 100 nm, and the mass fraction of Pb is 20%.

Embodiment 3

[0036] Weigh 0.1g of bismuth subsalicylate and disperse in 20g of N,N-dimethylformamide, ultrasonically disperse for 1h to make it evenly dispersed, then add 2g of polyacrylonitrile powder, stir at 60°C for 24h to fully dissolve and mix with Bismuth subsalicylate mixed well. Then 10 mL of the above solution was placed in a syringe, and spinning was carried out under the conditions of 10KV voltage, 25° C., and 10% relative humidity, and the distance between the needle tip of the syringe and the receiving plate was 5 cm. The obtained polymer fiber / metal salt composite film was pre-oxidized in air at 280 °C for 2 h, and then sintered at 1400 °C for 2 h under an argon atmosphere, the metal salt in it was reduced to metal Bi, and then cooled to room temperature to obtain nano Carbon fiber / Bi composite electrode material. The diameter of carbon nanofibers in the obtained carbon nanofiber film is about 200 nm, and the mass fraction of Bi is 8%.

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Abstract

The present invention discloses an application of carbon nanofiber and a metal composite electrode in a flow battery. An electrode material uses a mixture of high-molecular polymer and metallic salt as a precursor, nanofiber is made by a static electricity spinning method, and then carbon nanofiber is made after performing high-temperature carbonization processing on the nanofiber, wherein a diameter of the carbon nanofiber is 100-1000 nm, a diameter of a metal particle is 2-100 nm, and a mass fraction of metal/the carbon nanofiber is 1%-50%. The carbon nanofiber/metal composite electrode prepared by a preparation method has an excellent electrocatalytic activity and electrochemical reversibility when used in the flow battery, and has the advantages that the preparation method is simple, the working procedure is fewer, the raw material is readily available, the price is low and the like.

Description

technical field [0001] The invention relates to a preparation method of a carbon material and its application, in particular to a nano-carbon fiber material and its application in a liquid flow battery. Background technique [0002] Energy and the environment are two major issues facing mankind in the 21st century. With the continuous development of the economy, the human demand for energy is increasing. It is estimated that by 2050, human demand for energy will double and triple by the end of this century. On the one hand, traditional fossil energy reserves are limited and cannot meet the needs of social development. On the other hand, excessive consumption of fossil energy has brought serious environmental problems. In order to solve the dual problems of energy shortage and environmental pollution, the utilization and development of renewable energy is very important. However, renewable energy such as wind energy and solar energy is affected by the natural environment s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/96H01M4/86H01M4/88H01M8/18
CPCY02E60/50
Inventor 刘涛张华民许驰李先锋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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