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Preparation method of ion exchange resin substrate and activated carbon integrated electrode for capacitive desalination

An ion exchange resin, activated carbon technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of weak contact, the influence of membrane capacitance desalination performance, high mass transfer resistance and contact resistance, etc., and achieve energy consumption. reduced effect

Active Publication Date: 2016-07-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak contact between the carbon electrode and the ion exchange membrane, there is a high mass transfer resistance and contact resistance between the two, which affects the performance of membrane capacitance desalination.

Method used

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  • Preparation method of ion exchange resin substrate and activated carbon integrated electrode for capacitive desalination
  • Preparation method of ion exchange resin substrate and activated carbon integrated electrode for capacitive desalination
  • Preparation method of ion exchange resin substrate and activated carbon integrated electrode for capacitive desalination

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preparation example Construction

[0026] The ion exchange resin-supercapacitor activated carbon-PTFE monolithic composite electrode for capacitive desalination comprises a cathode and an anode, and the steps of the preparation method are as follows:

[0027] cathode:

[0028] 1) The supercapacitor activated carbon (model SPC-02S Fujian Xinsen Carbon Industry Co., Ltd.) has a specific surface area of ​​1500m 2 / g) and cation exchange resin (model 005×7) (Nankai University Resin Co., Ltd.) were ultrasonically cleaned and dried in deionized water, and then mixed with absolute ethanol and ultrasonically stirred for 15-30min to make the conductive carbon The black is fully dispersed and dissolved in absolute ethanol. Under the condition of ultrasonic stirring, the polytetrafluoroethylene emulsion is added dropwise, and then ultrasonically stirred for 15-30min. The results of cathode scanning electron microscopy are as follows: figure 1 As shown, the preparation process is as follows figure 2 shown.

[0029] 2) ...

Embodiment 1

[0041]The ion exchange resin-supercapacitor activated carbon-PTFE monolithic composite electrode for capacitive desalination comprises a cathode and an anode, and the steps of the preparation method are as follows:

[0042] cathode

[0043] 1) Take 6g of activated carbon powder and 1g of cation exchange resin, mix the two in deionized water, ultrasonically clean and dry them, mix with 42g of absolute ethanol, and stir ultrasonically for 15 minutes to fully disperse and dissolve the carbon powder in absolute ethanol In the process, under the condition of ultrasonic stirring, add polytetrafluoroethylene emulsion dropwise, and then ultrasonically stir for 15 minutes;

[0044] 2) Stir the above mixed substance in a water bath at 70°C for 1h30min, add absolute ethanol to make it into a micelle, and roll it continuously on a roller press until it is pressed into a thin sheet to obtain a cation exchange resin-activated carbon Electrode CER-AC-1;

[0045] anode

[0046] 1) Take 6g ...

Embodiment 2

[0050] The ion exchange resin-supercapacitor activated carbon-PTFE monolithic composite electrode for capacitive desalination comprises a cathode and an anode, and the steps of the preparation method are as follows:

[0051] cathode

[0052] 1) Take 5g of activated carbon powder and 1g of cation exchange resin, mix them in deionized water and ultrasonically clean and dry them, mix them with 48g of absolute ethanol, and stir ultrasonically for 25min to fully disperse and dissolve the carbon powder in absolute ethanol In the process, under the condition of ultrasonic stirring, add polytetrafluoroethylene emulsion dropwise, and then ultrasonically stir for 25 minutes;

[0053] 2) Stir the above mixed substance for 2 hours in a water bath at 80°C, add absolute ethanol to make it into a micelle, and roll it continuously on a roller press until it is pressed into a thin sheet to obtain a cation exchange resin-activated carbon Electrode CER-AC-2;

[0054] anode

[0055] 1) Take 5g...

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Abstract

The invention relates to an ion exchange resin substrate and activated carbon integrated electrode for capacitive desalination and a preparation method of the electrode. The electrode for capacitive desalination comprises a cathode and an anode, and cation exchange resin and anion exchange resin are respectively directly rolled and embedded into an activated carbon electrode and compactly pressed to an electrode structure formed on a stainless steel mesh. The preparation method includes cathode preparation and anode preparation. By direct embedding of cation and anion into the activated carbon electrode, influences of common ion effect can be avoided so as to improve desalination performance and electric charge efficiency, and a binding force between the electrode and an ion exchange material can be increased to realize performance stability. The ion exchange resin substrate and activated carbon integrated electrode is improved by 30% in performance and reduced by 5% in energy consumption as compared with an activated carbon roll electrode and improved by 85% in performance and reduced by 30% in energy consumption as compared with activated carbon cloth. Salt adsorption capacity of the electrode reaches 20.8mg / g, and electric charge efficiency reaches 87.4%.

Description

technical field [0001] The invention relates to the technical field of capacitive desalination, in particular to an ion-exchange resin-activated carbon integrated electrode for capacitive desalination and a preparation method thereof; an electrode material for capacitive desalination with anion / cation exchange resin and supercapacitor activated carbon as main components and its Preparation method, and application in pure capacitive desalination system. Background technique [0002] Capacitive desalination technology is a new type of seawater desalination technology, which has the advantages of high energy utilization, environmental friendliness, low operating cost, and easy operation. It is under the action of an electric field, through the electric double layer capacitance formed on the surface of the porous material, the ions in the solution are electrically adsorbed to achieve the purpose of deionization. The core of capacitive desalination technology is the electrode, a...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F103/08
CPCC02F1/4604C02F2103/08
Inventor 李楠安敬昆王鑫
Owner TIANJIN UNIV
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