| 초록 |
Perfluorosulfonic acid (PFSA) based membranes such as Nafion, which is used in proton-exchange membrane water electrolysis (PEMWE), have excellent proton conductivity and outstanding chemical stability. However, due to their randomly interconnected ion channels, they have high hydrogen crossover, resulting in reducing cell performance, so that thick membranes are inevitably used despite the high cost and membrane resistance. In this study, we fabricate a thin PFSA film with well-aligned ion channels on the air/water interface via solution bubbling for enhancing membrane properties. Since PFSA ionomer has surface activity, it can be effectively adsorbed on the bubble surface and transferred to the air/water interface, thereby forming a well-aligned multi-layer. In order to apply to PEM, the well-aligned thin PFSA film is simply deposited on the supporting membrane by Langmuir-Schaefer method. From these results, we expect this study to have great potential in application to PEMWE. |
