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Preparation method and electrode of hydrophilic multilayer capacitive deionization electrode

A multi-layer structure and deionization technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of reducing the theoretical adsorption/desorption performance of electrodes, achieve excellent conductivity, easy access to raw materials, and easy operation simple effect

Active Publication Date: 2020-04-21
江苏美淼储能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this preparation process removes a lot of hydrophilic functional groups, which reduces the theoretical adsorption / desorption performance of the electrode.

Method used

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  • Preparation method and electrode of hydrophilic multilayer capacitive deionization electrode
  • Preparation method and electrode of hydrophilic multilayer capacitive deionization electrode
  • Preparation method and electrode of hydrophilic multilayer capacitive deionization electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add 0.2mol oxalic acid and 100ml deionized water to ultrasonically disperse for 2 hours to obtain a uniform oxalic acid solution, then add 0.5mol graphene oxide to the oxalic acid solution and ultrasonically disperse for 3 hours to obtain a uniform graphene oxide oxalic acid solution; add 0.1mol zinc sulfate and 0.2mol ferrous sulfate plus 100ml deionized water for ultrasonic dispersion for 2 hours to obtain a zinc sulfate / ferrous sulfate mixture; put the graphene oxide oxalic acid solution and zinc sulfate / ferrous sulfate mixture in a hydrothermal kettle at 120~250°C The reaction was carried out for about 2 hours; the mixed solution (reaction product) after the reaction was filtered and washed 5-10 times repeatedly, and the pH of the washing solution was measured until the pH of the washing solution was neutral for the last time. The drying temperature was 100°C. A graphene / zinc ferrite composite material is obtained.

[0030] (2) The graphene / zinc ferrite composit...

Embodiment 2

[0033] (1) Add 0.3mol oxalic acid and 100ml deionized water to ultrasonically disperse for 2 hours to obtain a uniform oxalic acid solution, then add 1mol graphene oxide to the oxalic acid solution and ultrasonically disperse for 3 hours to obtain a uniform graphene oxide oxalic acid solution; mix 0.1mol zinc sulfate and Add 0.2mol of ferrous sulfate and 100ml of deionized water to ultrasonically disperse for 2 hours to obtain a mixture of zinc sulfate and ferrous sulfate; place the graphene oxide oxalic acid solution and zinc sulfate / ferrous sulfate mixture in a hydrothermal kettle for 2 hours at 200°C ; The mixed solution (reaction product) after the reaction is repeatedly sucked and washed to neutrality, and the graphene / zinc ferrite composite material is obtained after drying.

[0034] (2) The graphene / zinc ferrite composite material obtained in step (1) in this embodiment is mixed with 2.8g polyvinylidene fluoride plus 30ml nitrogen, nitrogen-dimethylacetamide solution to ...

Embodiment 3

[0037] (1) Ultrasonic disperse 0.5mol oxalic acid and 100ml deionized water for 2 hours to obtain a uniform oxalic acid solution, then add 3 mol graphene oxide to the oxalic acid solution and ultrasonically disperse for 3 hours to obtain a uniform graphene oxide oxalic acid solution; mix 0.1mol zinc sulfate and Add 0.2mol ferrous sulfate and 100ml deionized water to ultrasonically disperse for 2 hours to obtain a zinc sulfate / ferrous sulfate mixture; put the graphene oxide oxalic acid solution and the zinc sulfate / ferrous sulfate mixture in a hydrothermal kettle for reaction at 200°C 2h; the mixed solution (reaction product) after the reaction was repeatedly suction-filtered, washed until neutral, and dried to obtain a graphene / zinc ferrite composite material.

[0038] (2) Blend the graphene / zinc ferrite composite material obtained in step (1) of this example with 5g of polyvinylidene fluoride plus 30ml of nitrogen, nitrogen-dimethylacetamide solution to prepare electrode slurr...

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Abstract

The invention belongs to the field of electrode materials, and specifically relates to a method for preparing a hydrophilic multilayer structure capacitive deionization electrode, which includes: preparing graphene / zinc ferrite composite material; preparing graphene through graphene / zinc ferrite composite material / zinc ferrite multilayer structure capacitive deionization electrode; and improve the hydrophilicity of graphene / zinc ferrite multilayer structure capacitive deionization electrode. The graphene / zinc ferrite multilayer structure capacitive deionization electrode prepared by this preparation method has high specific surface area, excellent conductivity and good hydrophilic properties.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a method for preparing a capacitive deionization electrode with a hydrophilic multilayer structure and the electrode. Background technique [0002] Capacitive deionization (CDI) is an emerging green low-energy water purification technology. Graphene oxide, as a derivative of graphene, is similar to carbon nanotubes. Due to the mutual attraction between layers, graphene monomers after oxidation and reduction tend to form secondary stacks to form agglomerates. On the one hand, the in situ hydrothermal process of graphene monomer and zinc ferrite precursor can well suppress the above phenomenon; on the other hand, graphene oxide also forms reduced graphene oxide through thermal reduction in this process, and at the same time Pseudocapacitance is introduced into the electric double layer system, which increases the specific capacitance performance of the electrode. [0003] Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/26H01G11/30H01G11/36H01G11/46
CPCH01G11/26H01G11/30H01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 沈敏王秋泽朱鹏飞翟夏哲陈亚云
Owner 江苏美淼储能科技有限公司
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