| abstract |
The present invention relates to an ion exchange membrane, a manufacturing method therefor, and an energy storage device comprising the same. The ion exchange membrane comprises: a porous support including a plurality of pores; a first ion conductor positioned on one surface of the porous support; and a second ion conductor positioned on the other surface of the porous support, wherein each of the first ion conductor and the second ion conductor is a polymer containing a hydrophilic repeating unit and a hydrophobic repeating unit, and molar ratios of the hydrophilic repeating unit and the hydrophobic repeating unit are different from each other. The ion exchange membrane has excellent ion conductivity performance and has reduced membrane resistance and thus enhances both performance efficiency and voltage efficiency of an energy storage device, thereby improving overall efficiency of the energy storage device. In addition, the ion exchange membrane is excellent in shape stability and can reduce crossover of a vanadium ion, thereby securing durability performance of the energy storage device. |