| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터) |
| 권호 |
43권 1호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Sub- 5 nm graphene oxide nanofilm with exceptionally high H+/V selectivity for vanadium redox flow battery |
| 초록 |
Highly H+/V selective membranes are desired in high-performance vanadium redox flow batteries (VFRBs) to overcome the cross-over phenomena of vanadium species). Herein, we first demonstrated that the molecular-sieving nanochannels (~0.84 nm) formed inside a graphene oxide (GO) laminate (~5 µm) efficiently blocked the transport of vanadium ions, while allowing the transport of H+. Furthermore, an ultrathin (sub-5 nm) and highly-selective GO nanofilm was successfully coated on a porous substrate to improve the H+ flux using a facile spin-coating method. The GO-coated thin-film composite (TFC) membrane showed much higher H+ flux, along with an exceptionally high H+/V selectivity (up to 850), due to the molecular-sieving nanochannels inside the GO nanofilm, leading to a much more enhanced VRFB performance in terms of energy efficiency (EE: 84.7%) compared to the benchmark Nafion membrane (EE: 69.2%), at 20 mA cm-2. |
| 저자 |
박슬찬, 이태훈, 문기현, 김병수, 박호범, 강용수
|
| 소속 |
한양대 |
| 키워드 |
Graphene oxide membrane; vanadium redox flow battery; battery separator
|
| E-Mail |
|
