Ion-exchange membrane, method for manufacturing same, and energy storing device comprising same

A technology for ion exchange membranes and manufacturing methods, applied in the field of ion exchange membranes and their manufacture and energy storage devices containing the membranes, can solve the problems of reduced efficiency of ion exchange membranes, harsh synthesis methods, and low ion conductivity, and achieve improved Effect of exchanging performance, improving efficiency, and improving surface adhesion

Inactive Publication Date: 2018-12-21
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] However, the above-mentioned membranes are expensive, and the synthesis method is relatively harsh. Not only is it difficult to mass-produce, but also there are problems such as crossover phenomenon and low ion conductivity at high or low temperature in electric energy systems such as redox flow batteries. Disadvantages of significantly lower efficiency when ion-exchanging membranes

Method used

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  • Ion-exchange membrane, method for manufacturing same, and energy storing device comprising same
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  • Ion-exchange membrane, method for manufacturing same, and energy storing device comprising same

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Embodiment approach

[0168] Hereinafter, the embodiments of the present invention will be described in detail so that those skilled in the art of the present invention can easily implement them. However, the present invention can be implemented in various forms and is not limited to the examples described below.

Embodiment 1-1

[0171] After electrospinning under the state of applying a voltage of 30KV to the polyamic acid / THF spinning solution with a concentration of 12% by weight, a nano-network precursor of polyamic acid is formed, and then it is carried out in an oven at 350°C for 5 hours. Heat treatment was performed to manufacture a polyimide porous support having an average thickness of 15 μm. At this time, the electrospinning was performed at 25° C. with a voltage of 30 kV applied to the nozzle.

[0172] SPEEK (sulfonated polyetheretherketone, sulfonated polyetheretherketone) was dissolved in N-methyl-2-pyrrolidinone (N-methyl-2-pyrrolidinone, NMP) to prepare a 10% by weight ion conductor solution.

[0173] The porous support was immersed in the solution of the ion conductor. Specifically, the immersion process was performed at room temperature for 20 minutes. At this time, a reduced-pressure environment was applied for about 1 hour to remove microbubbles. Thereafter, NMP was removed by dryin...

Embodiment 1-2

[0177] An etching solution was prepared by diluting SPEEK (sulfonated polyetheretherketone, sulfonated polyetheretherketone) as an ion conductor with DMAc as a solvent. At this time, the above-mentioned ion conductor was contained in the above-mentioned etching solution in an amount of 3% by weight relative to the total weight of the above-mentioned etching solution.

[0178] At room temperature, at 0.1ml / ㎝ 2 After spraying the above-produced etching solution on the surface of the ion-exchange membrane produced in the above-mentioned Example 1-1, it was dried in a hot IR oven kept at 80° C. for etching treatment. On the surface of the ion conductor produced above, fine irregularities with a length of 3% of the total thickness of the silica coating layer were formed.

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Abstract

The present invention relates to an ion-exchange membrane, a method for manufacturing the same, and an energy storing device comprising the same. The ion-exchange membrane comprises: a porous supportbody comprising multiple pores; an ionic conductor filling the pores of the porous support body; and a silica coating layer that is positioned on the surface of the porous support body and comprises silica and an ionic conductor. An ion-exchange membrane according to an embodiment of the present invention has an improved bondability at an interface with other materials, which are bonded to the ion-exchange membrane, by means of surface energy control. Therefore, the ion-exchange membrane has a long-term durability maintained stably and thus can improve bonding durability not only when appliedto an energy storing device, but also when applied to a power generating system. In addition, an ion-exchange membrane according to an embodiment of the present invention has a reduced resistance at an interface with other materials by means of surface energy control, and the through-plane exchange performance of the ion-exchange membrane is accordingly improved, making it possible to improve notonly the bonding durability, but also the system efficiency.

Description

technical field [0001] The present invention relates to ion-exchange membranes and their manufacturing methods and energy storage devices comprising the membranes, in particular to improving surface adhesion to other materials bonded to ion-exchange membranes through surface energy control and reducing the surface Resistive ion-exchange membranes, methods of making them, and energy storage devices comprising the membranes. Background technique [0002] In order to solve the problem of fossil fuel depletion and environmental pollution, efforts are being made to save fossil fuels by improving usage efficiency or to apply renewable energy to more fields. [0003] Renewable energy sources such as solar heat and wind power are used much more efficiently than before, but these sources are intermittent and unpredictable. Due to these characteristics, the dependence on these energy sources is limited and the proportion of renewable energy sources in the primary power supply is very...

Claims

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Application Information

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IPC IPC(8): C08J5/22H01M8/18
CPCY02E60/50Y02P70/50H01M8/188C08J5/22C08J5/2293
Inventor 金娜玲李瞳熏廉承辑
Owner KOLON IND INC
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