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Silver-carbon electrode material as well as preparation method and application thereof

An electrode material, silver carbon technology, applied in silver carbon electrode material and its preparation, the application field of silver carbon electrode material in seawater desalination device, can solve the problems of poor conductivity, short cycle life of silver electrode, etc., to improve agglomeration , Improve cycle stability, improve the effect of liquid absorption capacity

Pending Publication Date: 2021-12-31
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide a silver-carbon electrode material and its preparation method, as well as the application of the silver-carbon electrode material in seawater desalination devices, aiming to solve the problem of silver chloride with poor conductivity generated by the existing Ag electrode in the chlorine storage process , leading to the problem of short cycle life of the silver electrode

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  • Silver-carbon electrode material as well as preparation method and application thereof
  • Silver-carbon electrode material as well as preparation method and application thereof
  • Silver-carbon electrode material as well as preparation method and application thereof

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preparation example Construction

[0053] The second aspect of the embodiment of the present application provides a method for preparing a silver-carbon electrode material, comprising the following steps:

[0054] S01. Dispersing carbon nanotubes and silver salts in a solvent and ultrasonically treating them to obtain a mixed system;

[0055] S02. Add sodium borohydride aqueous solution to the mixing system, collect the precipitate after the reaction, dry the obtained precipitate and grind it to obtain a powder material;

[0056] S03. Annealing the powder material at a temperature of 200-400° C. for 3-8 hours to prepare a silver-carbon electrode material with silver particles loaded on the surface of carbon nanotubes.

[0057] The preparation method of the silver-carbon electrode material provided in the embodiment of the present application uses a wet chemical method to mix carbon nanotubes and silver salts in a solvent, and under the action of a reducing agent, the silver salts are reduced to silver particles...

Embodiment 1

[0083] Preparation of silver carbon materials: silver carbon materials use inorganic carbon nanotubes (CNTs) as carbon source, silver nitrate (AgNO 3 ) as silver source, CNTs and AgNO 3 Add deionized water at a mass ratio of 1:10 for ultrasonication and stirring to make the CNTs uniformly dispersed in water. A 0.75 mol / L sodium borohydride aqueous solution was added dropwise to the dispersed solution to form a gray-black precipitate, and the formed gray-black precipitate was washed 3 times with deionized water and centrifuged. The centrifuged material was transferred to an oven and dried at 80°C for 12 hours. The dried gray-black powder was ground in a mortar for 60 minutes, transferred to a quartz tank, and annealed at 250°C for 5 hours to obtain a silver-carbon material.

[0084] Grind the prepared silver-carbon material in a mortar for 30 minutes, mix it with activated carbon and polyvinylidene fluoride in a mass ratio of 8:1:1 to obtain the first mixture, then add the fir...

Embodiment 2

[0092] The basic steps are the same as in Example 1, the difference is: CNTs and AgNO 3 The molar ratio was set to 1:20.

[0093] The performance test of the silver carbon electrode prepared in Example 2 was carried out. When other conditions remain unchanged, only change the CNTs and AgNO 3 The test results show that the electrochemical performance of the electrode is good, the oxidation peak and reduction peak shown in the CV diagram are obvious, the symmetry is good, the electrode also has high stability, and the initial desalination amount is 201mg / g , after 150 cycles, the desalination capacity was stable at 75mg / g.

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Abstract

The invention belongs to the technical field of seawater desalination, and provides a silver-carbon electrode material as well as a preparation method and application thereof. The silver-carbon electrode material comprises silver particles and a carbon nanotube, and the silver particles are loaded on the surface of the carbon nanotube. According to the silver-carbon electrode material provided by the embodiment of the invention, the conductivity of the material can be improved, and the cycling stability of the electrode is improved, so that a seawater desalination battery taking the silver-carbon electrode material as the electrode material is endowed with excellent desalination performance; and the electrode material can be used for desalination of light salt brine and brackish water and has great social benefits and wide market prospects.

Description

technical field [0001] The application belongs to the technical field of seawater desalination, and in particular relates to a silver-carbon electrode material and a preparation method thereof, as well as the application of the silver-carbon electrode material in a seawater desalination device. Background technique [0002] Desalination battery is a new type of desalination technology. By inputting electric energy, a redox reaction (Faraday reaction) occurs on the electrode surface to extract sodium ions and chloride ions in the salt solution to achieve the purpose of desalination and desalination. Then release ions into the concentrated brine through the discharge process (short-circuiting the two electrodes or applying reverse voltage), and recover part of the energy at the same time. [0003] The shortage of water resources and the pollution of water environment are major problems that plague the sustainable development of society, and seawater desalination technology pro...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F103/08
CPCC02F1/46109C02F2001/46133C02F2103/08
Inventor 王文辉徐东川李朝林祝明月
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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