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Carbon nanofiber and metal composite electrode and application thereof

A nano-carbon fiber and metal composite technology, applied in battery electrodes, circuits, fuel cells, etc., can solve the problems of high electrode cost and unsuitable for large-scale application, achieve low price, improve electrocatalytic activity and electrochemical reversibility, Effects that are easy to mass produce

Active Publication Date: 2020-04-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • 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.; Skyllas-Kazacos, M. Chemical Modification and Electrochemical Behavior of Graphite Fiber in Acidic VanadiumSolution.Electrochim.Acta 1991,36,513-517.) 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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  • Carbon nanofiber and metal composite electrode and application thereof
  • Carbon nanofiber and metal composite electrode and application thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Weigh 0.5g Bi(NO 3 ) 3 ·5H 2 Dissolve O in 20g of N,N-dimethylformamide, ultrasonically disperse for 1 hour to completely dissolve, then add 2g of polyacrylonitrile powder, and stir at 70°C for 24 hours 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, and then sintered at 1200°C for 2h in an argon atmosphere to reduce the metal salt in it to metal, and then cooled to room temperature, and then Oxidize in air at 450° C. for 2 h to remove the graphite sheets wrapped on the surface of Bi nanoparticles to prepare carbon nanofiber / Bi composite electrode materials. Such as figure 1 As shown, the SEM image of carbon nanofiber / Bi composite electrode material shows th...

Embodiment 2

[0035] Weigh 0.4g Pb(NO 3 ) 2 Dissolve 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 to reduce the metal salt in it to metal Pb, then cooled to room temperature, and then It is oxidized in the air at 400° C. for 2 hours, and the graphite sheets wrapped on the surface of Pb nanoparticles are oxidized to remove the carbon nanofiber / Pb composite electrode material. The diameter of the carbon nanofibers in the obtained carbon nanofiber film is ab...

Embodiment 3

[0037] Weigh 0.1g of bismuth subsalicylate and disperse it in 20g of N,N-dimethylformamide, ultrasonically disperse for 1h to disperse evenly, then add 2g of polyacrylonitrile powder, stir at 60°C for 24h to fully dissolve and Mix well with bismuth subsalicylate. 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 2h, and then sintered at 1400°C for 2h under an argon atmosphere to reduce the metal salt in it to metal Bi, and then cooled to room temperature, and then It is oxidized in the air at 500° C. for 1 h, and the graphite sheets wrapped on the surface of Bi nanoparticles are oxidized to remove the carbon nanofiber / Bi composite electrode material. The diameter of carbon nanofibers in the o...

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Abstract

The invention discloses a carbon nanofiber / metal composite electrode for a flow battery and a preparation method thereof. The electrode material is prepared by the following steps of: taking a mixtureof a high-molecular polymer and a metal salt as a precursor; preparing nanofibers by adopting an electrostatic spinning method; and performing high-temperature carbonization treatment, and performingsurface oxidation and etching to manufacture the electrode material, wherein the diameter of the carbon nanofibers is 100-1000 nm, the diameter of the metal particles is 2-100 nm, the metal particlesare distributed on the surfaces of the carbon nanofibers, one parts of the metal particles are embedded into the carbon nanofibers, and the other parts of the metal particles are exposed out of the surfaces of the carbon nanofibers. The carbon nanofiber / metal composite electrode prepared by adopting the preparation method has good electrocatalytic activity and electrochemical reversibility when used for the flow battery, and has the advantages of simple preparation method, few procedures, easily available raw materials, low price and the like.

Description

technical field [0001] The invention relates to the field of flow batteries, in particular to an electrode material for a flow battery and its preparation. 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 such as day and night and season changes, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M8/18H01M4/92
CPCH01M4/8825H01M4/9041H01M4/9083H01M4/926H01M8/188Y02E60/50
Inventor 刘涛李先锋张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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