| 학회 |
한국공업화학회 |
| 학술대회 |
2017년 가을 (11/08 ~ 11/10, 부산 벡스코(BEXCO)) |
| 권호 |
21권 2호 |
| 발표분야 |
에너지저장변환_포스터 |
| 제목 |
The impact of scaling the water cluster size of Nafion membrane for high performance Zn/Br redox flow battery |
| 초록 |
Due to its cation transport ability, Nafion membranes have been widely used in many electrochemical device as a typical cation exchange membrane. This work presents that the size of the ion exchange channel in Nafion membrane changes depending on pretreatment and how it affects the bi-ionic transport property for Nafion membrane. Small angle X-scattering, diffusion cell, and electrochemical analyses verify that the water clusters are expanded with increasing pre-hydration temperature. This results in the increases of water uptake, ionic conductivity and anion transference number. The bi-ionic transport and low area specific resistance induced by the pretreatment enable successful operation of Zn/Br flow batteries with NRE212 membrane. A properly treated Nafion membrane delivers 11.3% higher energy efficiency compared with a conventional porous membrane, indicating that dense structured ion exchange membrane can be employed for Zn/Br flow batteries with scaling the water cluster size. |
| 저자 |
김리율, 육성민, 이주혁, 최찬용, 김수현, 허지윤, 김희탁
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| 소속 |
한국과학기술원 |
| 키워드 |
Zinc/bromine RFB; Nafion membrane; pre-treatment; bi-ionic transport; Bromine crossover; transference number
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| E-Mail |
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