Structure and Performance of 50SOPBI-Based Ion-Solvating Membrane (IMAGE)
Caption
(Top) Molecular structure of 50SOPBI.
(Left) Higher ionic conductivity compared to anion exchange membranes.
(Center) Excellent alkaline stability.
(Right) Water electrolysis performance comparison among a commercial diaphragm, a commercial anion exchange membrane, and the developed ion-solvating membrane.
The 50SOPBI membrane contains both hydrophilic and hydrophobic domains, forming highly conductive regions alongside swelling-resistant regions, thereby reducing the need for crosslinking. In addition, the absence of quaternary ammonium groups results in outstanding alkaline stability. The membrane maintained nearly unchanged molecular weight after storage in alkaline solution at 80 °C for six months, indicating negligible chemical degradation. Compared with commercial diaphragms and AEMs, the 50SOPBI-based ISM exhibited superior electrolysis performance.
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Korea Institute of Science and Technology
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