| 학회 |
한국공업화학회 |
| 학술대회 |
2018년 봄 (05/02 ~ 05/04, 대구 엑스코(EXCO)) |
| 권호 |
22권 1호 |
| 발표분야 |
우수논문(구두)-박사과정 |
| 제목 |
Ion-selective Graphene Oxide Framework for Enhanced Durability of Hydrocarbon Membrane in Vanadium Redox Flow Battery |
| 초록 |
Graphene oxide membrane provides exceptional ion separation properties, which arise from a regular interlayer spacing (d). However, a larger effective pore size of the laminate than hydrated dimeters of vanadium ions prevents its use in vanadium redox flow battery (VRFB). In this work, we report an ion-selective graphene oxide framework (GOF), d of which is tuned by cross-linking of graphene oxide nanosheets. With exploiting its effective pore size, the GOF membrane is employed as a protective layer to address the poor chemical stability of hydrocarbon (HC) membrane against VO2+ in VRFB. Due to the effective blocking of VO2+, the GOF/HC membrane exhibits much lower vanadium permeability and far longer durability compared with HC membranes. Moreover, a VRFB with the GOF/SPAES membrane achieves an energy efficiency of 89% at 80 mA cm-2 and a capacity retention of 88% even at 400th cycle, which even exceed those of Nafion 115, demonstrating its practical applicability for VRFB. |
| 저자 |
김수현1, 최정훈1, 최찬용1, 허지윤1, 김대우1, 이장용2, 홍영택2, 정희태1, 김희탁1
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| 소속 |
1한국과학기술원, 2한국화학(연) |
| 키워드 |
graphene oxide framework membranes; vanadium redox flow batteries; pore size exclusions; hydrocarbon membranes; chemical stabilities
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| E-Mail |
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