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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Sulfonated mesoporous membrane with high ion permselectivity for vanadium redox flow batteries

등록일
2019년 2월 13일 11시 04분 20초
접수번호
4045
발표코드
POLY.O-9 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 10시 : 36분
발표형식
구두발표
발표분야
Polymer Chemistry - Oral Presentation for Young Polymer Scientists
저자 및
공동저자
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
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.

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