Carbon aerogel electrode dedicated for capacitive deionization device and preparation method thereof

A technology of capacitive deionization and carbon airgel, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as complicated processes, increased electrode manufacturing costs, and reduced airgel electrosorption performance. The effect of simple process, high mechanical strength and low preparation cost

Active Publication Date: 2017-03-22
ZHEJIANG DOWAY ADVANCED TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current process of preparing carbon aerogels into a monolithic electrode product is complicated, and generally requires the addition of adhesives, which not only greatly increases the manufacturing cost of electrodes, but also reduces the electrosorption performance of aerogels.

Method used

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  • Carbon aerogel electrode dedicated for capacitive deionization device and preparation method thereof
  • Carbon aerogel electrode dedicated for capacitive deionization device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The structure diagram of carbon airgel electrode for capacitive deionization equipment is as follows figure 1 and figure 2 As shown, it is a stacked sandwich structure, which consists of the first spacer layer 1, the first carbon airgel layer 2, the current collector layer 3, the second carbon airgel layer 4, and the second spacer layer 5 from bottom to top. Laminated, the first non-woven fabric layer 1, the first carbon airgel layer 2, the current collector layer 3, the second carbon airgel layer 4, and the second mesh layer 5 are tightly stitched together by sutures 6 One.

[0053] The current collector layer 3 is provided with a tab protruding from the electrode at the edge, through which the external wire is connected. In this embodiment, the tab is long, 3 cm long and 1 cm wide.

[0054] The thickness of the first mesh separation layer or the second mesh separation layer is 0.2-0.5 mm. In this embodiment, a polypropylene non-woven fabric with a thickness of 0.5...

Embodiment 2

[0063] The carbon airgel particles are sieved successively with 50-mesh and 100-mesh sieves to obtain airgel particles with a particle size of 0.15-0.3 mm and a relatively uniform particle size distribution. Take 4g of carbon fibers with a wire diameter of 5um and a length of 1cm, mix them with 130g of airgel, place them in a stirrer and mix them evenly to prepare the airgel particle mixture. Use a polypropylene non-woven fabric with a length of 40 cm, a width of 40 cm, a thickness of 0.5 mm, and a filter hole diameter of 5 μm as the mesh layer. A carbon fiber cloth with a length of 40cm, a width of 40cm, and a thickness of 0.1mm is used as the current collector layer, and a fiber cloth tab with a length of 3cm and a width of 1cm protrudes from one corner of the carbon fiber cloth to facilitate the connection of wires.

[0064] First place the first mesh layer on the bottom, and then use a particle spreader to spread the carbon airgel particle mixture evenly on the first mesh ...

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Abstract

The invention discloses a carbon aerogel electrode for a capacitive deionization device: the electrode is of a laminated sandwich structure; a first separation net layer, a first carbon aerogel layer, a current collector layer, a second carbon aerogel layer and a second separation net layer are laminated from bottom to top successively to form the electrode and are closely stitched into a whole by stitching lines; the first carbon aerogel layer or the second carbon aerogel layer is mainly composed of carbon aerogel particles. A preparation method is also disclosed. The electrode provided by the invention can be assembled in a curly type or plane type way to be made into a CDI module. The aerogel electrode prepared by the method has the advantages of good integrity, high mechanical strength, and strong electrical conductivity, and can be curled. The method has no addition of a binder, and not only avoids the blockage of pores, but also ensures the electrical conductivity, specific capacitance and blocking property of the aerogel. The electrode is used for preparation of the capacitive deionization device which is used for desalting treatment of water, or removal of harmful ions such as heavy metal ions and fluorine ions in water and reduction of hardness.

Description

technical field [0001] The invention relates to the field of capacitive deionization wastewater treatment, in particular to a special carbon airgel electrode for capacitive deionization equipment and a preparation method thereof. [0002] Background technique: [0003] Capacitive deionization (CDI), also known as electrosorption technology (EST), its basic principle is based on the electric double layer theory in electrochemistry, and uses the electrochemical characteristics of the surface of the charged electrode to realize the adsorption and removal of charged particles in water and the removal of organic matter. decomposition etc. CDI has the advantages of low operating cost, no need to add chemicals, no secondary pollution, low requirements on influent water quality, simple operation and maintenance, adjustable desalination rate, high water recovery rate and long equipment life. [0004] Carbon Aerogel is a kind of capacitive deionization (CDI) electrode material with ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/469
CPCC02F1/46C02F1/469C02F1/4691Y02E60/13
Inventor 施小东刘泽宇施秦峰郑立成
Owner ZHEJIANG DOWAY ADVANCED TECH CO LTD
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