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Enhanced ion-exchange membrane for enhanced vanadium cell and preparation method thereof

A technology of ion exchange membranes and vanadium batteries, which is applied in the direction of regenerative fuel cells, battery pack parts, fuel cell parts, etc., can solve the problems of low vanadium resistance and affect the performance of vanadium batteries, and achieve stable performance and physical Stable performance and chemical performance, good electrochemical activity

Active Publication Date: 2012-10-10
辽宁科京新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes a method for preparing an enhanced ion-exchange membrane for vanadium batteries, which solves the problems of low vanadium resistance of perfluorosulfonic acid diaphragms in the prior art and affects the battery performance of vanadium batteries.

Method used

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  • Enhanced ion-exchange membrane for enhanced vanadium cell and preparation method thereof
  • Enhanced ion-exchange membrane for enhanced vanadium cell and preparation method thereof
  • Enhanced ion-exchange membrane for enhanced vanadium cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In this embodiment, the preparation method of the ion-exchange membrane for the enhanced vanadium battery is as follows:

[0025] (1) Weigh a certain amount of glucose powder and dissolve it in deionized water, configure it as a glucose aqueous solution with a weight concentration of 5%, then take a certain amount of glucose aqueous solution and place it in a high-pressure reactor, perform hydrothermal treatment, and treat at 200 ° C for 5 hours , and then filtered, washed, and dried to make nano-carbon material powder; in this embodiment, the particle size of the nano-carbon material powder is about 200nm.

[0026] Such as figure 1 As shown, it can be seen from the SEM picture of the nano-carbon material that the particle size distribution of the prepared nano-carbon material is relatively uniform, concentrated at about 200 nanometers.

[0027] (2) The prepared nano-carbon material powder was ultrasonically dispersed in the dissolved perfluorosulfonic acid resin solut...

Embodiment 2

[0030] The difference from Example 1 is that in this example, the preparation method of the ion-exchange membrane for the enhanced vanadium battery is as follows:

[0031] (1) Take a certain amount of glucose powder and dissolve it in deionized water, and configure it into an aqueous glucose solution with a weight concentration of 5%, then take a certain amount of aqueous solution and place it in a high-pressure reactor, perform hydrothermal treatment, and treat at 200 ° C for 5 hours, Then filter, wash, and dry to make nano-carbon material powder; in this embodiment, the particle size of nano-carbon material powder is about 200 nanometers.

[0032] (2) The prepared nano-carbon material powder was ultrasonically dispersed in the dissolved perfluorosulfonic acid resin solution (mass of nano-carbon material: mass of perfluorosulfonic acid resin = 2:98), and the dispersion time was 1 hour.

[0033] (3) The dispersed solution was poured onto flat glass, and after drying at 140° C....

Embodiment 3

[0036] The difference from Example 1 is that in this example, the preparation method of the ion-exchange membrane for the enhanced vanadium battery is as follows:

[0037] (1) Weigh a certain amount of glucose powder and dissolve it in deionized water, configure it as an aqueous glucose solution with a weight concentration of 7%, then take a certain amount of aqueous solution and place it in a high-pressure reactor for hydrothermal treatment at 180°C for 8 hours, Then filter, wash and dry to make nano carbon material powder.

[0038] (2) The prepared nano-carbon material powder was ultrasonically dispersed in the dissolved perfluorosulfonic acid resin solution (mass of nano-carbon material: mass of perfluorosulfonic acid resin = 3:97), and the dispersion time was 2 hours.

[0039] (3) The dispersed solution was poured onto flat glass, and after drying at 120°C for 6 hours, the enhanced ion exchange membrane was prepared and assembled into a battery for battery performance test...

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Abstract

The invention, relating to the field of cell manufacturing and energy storage, discloses an enhanced ion-exchange membrane for a vanadium cell, solving the problems that Nafion membranes have low vanadium resistance and have influence on vanadium cell performances in the prior art. The preparation method is characterized by carrying out ultrasonic dispersion on the prepared nano carbon particles containing functional groups in a Nafion resin solution, and then conducting cast molding to obtain the enhanced membrane material. According to the method, by doping the nano carbon material whose surface contains functional groups (carboxyl or hydroxyl, etc.) in a matrix membrane material to enhance the vanadium resistance and ion exchange rate of the membrane material, thus the energy storage efficiency of the cell can be raised. The prepared ion-exchange membrane has outstanding stability. The cell performance is tested by using the prepared membrane material as a cell membrane and using 1.5M vanadyl sulfate and 2M sulfuric acid as an electrolyte, and the cell performance is obviously raised. The result of the test by vanadium resistance experiments shows that the vanadium resistance of the membrane is obviously raised.

Description

technical field [0001] The invention relates to the fields of battery manufacturing and energy storage, in particular to an ion exchange membrane for enhanced vanadium batteries and a preparation method thereof. Background technique [0002] All-vanadium redox flow battery (vanadium battery) is a secondary energy system that uses redox reactions between vanadium ions in different valence states to store and convert energy. Its characteristics are: no emission pollution, adjustable capacity, long cycle life, deep high current density discharge, fast charging, and high energy conversion rate. As an energy storage power source, vanadium batteries are mainly used in power station peak regulation, large-scale photoelectric conversion, energy storage power for wind power generation, and as energy storage systems in remote areas, uninterruptible power supplies or emergency power systems. [0003] At present, perfluorosulfonic acid ion-exchange membrane is the most used membrane ma...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M2/16H01M8/18
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 赵丽娜李文跃刘建国严川伟
Owner 辽宁科京新材料有限公司
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