| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
콜로이드 및 분자조립 부문위원회 |
| 제목 |
Zwitterion-Modified Li-S Separator for Li-Ion Acceleration and Redox Kinetics Mediation |
| 초록 |
In this work, we present an effective means to anchoring the zwitterionic sulfobetaine (SB) moieties on the separator surface, whereby the effective Li ion transport and facilitated polysulfide conversion could be concurrently accomplished. To construct the platform for the zwitterion anchoring, polydopamine (PDA) was first introduced to promote the surface wettability and activity for further covalent binding, which robustly enabled to form PDA/SB-coated separators. As such, the zwitterion-functionalized separators resulted in greatly enhanced ionic conductivities and Li ion transference number thanks to the facile dissociation of lithium salt and selectively promoted interactions between Li cations and anionic sulfonate end groups in SB. Furthermore, as the conversion kinetics of sulfur could be improved by SB zwitterion, outstanding Li-S battery performances implementing ultra-low capacity decaying rate of 0.034% during long-term cycling tests up to 1200 cycles at 3.0 C. |
| 저자 |
이준혁1, 연정석1, 박문정2, 박호석1, 유필진1
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| 소속 |
1성균관대, 2포항공과대 |
| 키워드 |
Zwitterion; Li-S battery; Separator; Ionic conductivity
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| E-Mail |
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