|
Type |
Oral Presentation |
Area |
Oral Presentation for Young Polymer Scientists |
Room No. |
Room 403 |
Time |
THU 10:36-10:48 |
Code |
POLY.O-9 |
Subject |
Sulfonated mesoporous membrane with high ion permselectivity for vanadium redox flow batteries |
Authors |
Choongseop Jeon, Myungeun Seo1,* graduate school of nanoscience and technology, Korea Advanced Institute of Science and Technology, Korea 1Graduate School of Nano Science Technology, Korea Advanced Institute of Science and Technology, Korea |
Abstract |
Mesoporous membranes with well-controlled pore size are useful for size-exclusive separation, where substances only smaller than the pore can traverse across the membrane. In a vanadium redox flow battery (VRFB), cation permselectivity providing facile proton transport and suppressed vanadium cross-over is one of the most important issues to ensure long cyclability without loss of voltage efficiency. We show that sulfonated mesoporous membranes synthesized via polymerization-induced microphase separation almost exclude vanadium cross-over when the pore size is below at 4 nm. Proton conductivity is retained because of facilitated hopping process along the sulfonated pore surface. VRFB cell data suggests higher efficiency and slower decrement in discharge Q compared to Nafion 212, demonstrating promise of this approach. |
E-mail |
wjscndtjq@kaist.ac.kr |
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