| 초록 |
H2 is a clean energy source for solving critical energy issues; hence, water electrolysis systems are needed for the storage of H2 produced from renewable energy sources. In this study, we propose an alkaline-based water electrolysis system equipped with Li-ion exchange membranes fabricated with various weight ratios of polyvinyl alcohol (PVA) and Nafion™. The physical (electrolyte uptake, thickness change, and mechanical strength), chemical (functional group and weight loss), and electrochemical (ionic conductivity and exchange capacity) properties of the polymer membranes are characterized. In the unit cell measurement, the Li-ion exchange membrane water electrolysis equipped with a polymer membrane containing an optimum amount of PVA exhibits improved performance, high current density of 1.65 A cm-2 at 1.7 V. |
