| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 가을 (10/06 ~ 10/08, 대구컨벤션센터(EXCO)) |
| 권호 |
40권 2호 |
| 발표분야 |
대학원생 구두발표 (발표15분) |
| 제목 |
Design of Sulfur-Rich Polymers towards New Cathode Materials of Lithium-Sulfur Batteries |
| 초록 |
Rechargeable lithium-sulfur batteries have been considered as one of the most promising future electrochemical energy storage systems on account of high theoretical specific energy density, which is 3 times higher than that of Li ion batteries. Herein, we report the development of new Li-S batteries by synthesizing sulfur-rich polymers having three-dimensionally interconnected sulfur domains. Porous trithiocyanuric acid (TTCA) crystals were employed as soft templates for the synthesis, where the ring-opening polymerization of elemental sulfur was taken place along the thiol surfaces of TTCA crystals. Our Li-S cells demonstrated reversible discharge capacity of 945 mAh/g after 100 cycle at 0.2C with high capacity retention of 92%. These Li-S cells also showed improved rate performance of 1210mAh/g at 0.1C and 730mAh/g at 5C. The markedly enhanced rate performance of our cells was rationalized by facilitated fast Li+-ion transport along the organized amine moieties in TTCA ring. |
| 저자 |
박문정, 김훈
|
| 소속 |
POSTECH |
| 키워드 |
Lithium-sulfur battery; cathode; sulfur-containing polymer
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| E-Mail |
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