Nafion ion exchange membrane used for enhanced vanadium redox battery and preparation method thereof

A perfluorosulfonic acid ion, exchange membrane technology, applied in the direction of fuel cells, battery pack parts, fuel cell parts, etc., can solve the problems of low mechanical strength, low exchange capacity, high mechanical strength, and improve mechanical strength. , the effect of high exchange capacity and high mechanical strength

Inactive Publication Date: 2011-04-20
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a perfluorosulfonic acid ion-exchange membrane for enhanced vanadium batteries and a preparation method thereof, to solve the problem that the perfluorosulfonic acid ion-exchange membranes existing in the prior art have high exchange capacity and low mechanical strength and mechanical The problem of high strength and low exchange capacity

Method used

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  • Nafion ion exchange membrane used for enhanced vanadium redox battery and preparation method thereof
  • Nafion ion exchange membrane used for enhanced vanadium redox battery and preparation method thereof
  • Nafion ion exchange membrane used for enhanced vanadium redox battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Dissolve 1.89g perfluorosulfonic acid ion exchange resin (exchange capacity IEC=0.7mmol / g) in 20ml N, N 2 -In dimethylformamide (DMF), heat the reaction kettle to 140° C. for 3 hours to dissolve the resin, and obtain a uniform and clear film-forming solution as the film-forming solution.

[0037] First, the prepared film-forming solution was vibrated in an ultrasonic oscillator for 1 hour to refine the solution and drive away tiny air bubbles therein. Then, take 10ml of the film-forming solution and cast it on a clean mold, heat it to 100° C., keep the temperature for 1 hour, and place the polytetrafluoroethylene (PTFE) mesh cloth 2 flatly on the film-forming solution. Finally, apply the remaining 10ml film-forming solution on the polytetrafluoroethylene (PTFE) mesh cloth 2, heat to 140°C, keep the temperature for 2h, and naturally cool to room temperature. A layer of film 1 was formed on each surface, and the obtained film was washed with distilled water and dried at ...

Embodiment 2

[0041] Substantially the same as example 1, the difference is that 0.63g perfluorosulfonic acid ion exchange resin is dissolved in 6.67mlN, N 2 - in dimethylformamide (DMF), as a film-forming solution.

[0042] In this embodiment, the reinforcing mesh is polytetrafluoroethylene (PTFE) mesh cloth, which is made of glass fiber as the base material woven into a mesh base cloth, and then coated with polytetrafluoroethylene resin. The grid of the mesh cloth is 0.5×0.5mm, and the thickness is 0.05mm.

Embodiment 3

[0044] Substantially the same as example 1, the difference is that 2.83g perfluorosulfonic acid ion exchange resin is dissolved in 30ml N, N 2 - in dimethylformamide (DMF), as a film-forming solution.

[0045] In this embodiment, the reinforcing mesh is polytetrafluoroethylene (PTFE) mesh cloth, which is made of glass fiber as the base material woven into a mesh base cloth, and then coated with polytetrafluoroethylene resin. The grid of the mesh cloth is 1×1mm, and the thickness is 0.1mm.

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Abstract

The invention relates to the field of an ion exchange membrane used for a vanadium redox battery (VRB), in particular to a Nafion ion exchange membrane used for enhanced vanadium redox battery and a preparation method thereof. A Nafion ion exchange resin containing sulfonic group is taken as forming resin; the resin is dissolved into organic solvent to obtain forming solvent; and the Nafion ion exchange membrane is formed by the forming solvent; a layer of polytetrafluoroethylene mesh in the middle of the Nafion ion exchange membrane is taken as reinforcing material; or a layer of Nafion ion exchange membrane is arranged between two layers of polytetrafluoroethylene meshes. The membrane has high chemical stability and high current density, and compared with the Nafion membrane, the Nafion ion exchange membrane has higher mechanical strength, higher exchange capacity and lower cost, and the problems that the Nafion ion exchange membrane in the prior art has high exchange capacity and low mechanical strength or high mechanical strength and low exchange capacity are solved, and the Nafion ion exchange membrane is mainly applied to the vanadium redox battery (VRB).

Description

technical field [0001] The invention relates to the field of ion-exchange membranes for all-vanadium redox flow batteries (VRB), in particular to a perfluorosulfonic acid ion-exchange membrane for enhanced vanadium batteries and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the contradiction between energy, resources and environmental protection has become increasingly prominent, prompting the urgent transformation of the traditional energy system to renewable energy. [0003] Adjusting the current power energy structure and developing large-scale utilization of renewable clean energy such as wind energy and solar energy have become the basic national policies for the development of electric energy in my country. The power generation process of renewable energy such as wind energy and solar energy is discontinuous and unstable. It needs to be equipped with power storage devices to achieve continuous and stable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M8/02C08J5/22H01M8/0239
CPCY02E60/50Y02E60/12
Inventor 赵丽娜刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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