A5063898084- Fuel Cells and Related Materials
- Advanced battery technologies research
- Advanced Battery Materials and Technologies
- Membrane-based Ion Separation Techniques
- Supercapacitor Materials and Fabrication
- Hybrid Renewable Energy Systems
- Advancements in Solid Oxide Fuel Cells
- Electrocatalysts for Energy Conversion
- Advanced Battery Technologies Research
Korea University of Science and Technology
2022-2025
Korea Institute of Science and Technology
2022-2025
Cheap, efficient water electrolysis with non-platinum catalysts is the key to a fossil fuel-free future. Highly conductive, mechanically strong separators are essential components.
Abstract While anion exchange membrane (AEM) water electrolysis has many advantages, its commercialization is impeded by the low alkaline stability of most AEM, due to fragility quaternary ammonium groups. Ion solvating membranes (ISM) can be an alternative, but so far require high concentrations. Here, it shown that sulfonation polybenzimidazole results in ISM which swell strongly 1 m KOH. Crosslinking with dibromoxylene controls swelling, and after activation conductivities >100 mS cm...
Abstract Ion conducting membranes play a crucial role in redox flow batteries, separating anolyte and catholyte while allowing proton transport to complete the circuit. However, most are trapped trade‐off relation show either low conductivity or high vanadium crossover. This study investigates use of dense sulfonated para ‐polybenzimidazole for batteries (VRFBs), analyzes effects membrane preparation process, thickness operating temperature on VRFB performance. The results demonstrate...
Abstract A sulfonated para ‐polybenzimidazole (MS‐PBI) membrane is thermally cured at 350 °C for 120 minutes. The thus obtained cMS‐PBI insoluble in hot phosphoric acid solution (<5% soluble fraction), and free of the known breaking points under alkaline conditions, i.e., no aromatic ether bonds, quaternary ammonium groups, N ‐alkylated neutral or positively charged imidazole groups. Indeed, a 6 months long stability test 2 M KOH 80 shows that retains its dimensions weight without any...