| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Fast-Charging, High-Energy, Flexible Li-S Batteries Based on Sulfur Microparticles |
| 초록 |
The realization of high-energy-density energy storage systems at a low cost has been a major challenge we face. Li-S batteries have attracted significant attention for this goal owing to the high theoretical capacity and abundant sulfur resources. Despite the prominent advantages, Li-S batteries suffer from detrimental drawbacks such as the dissolution of sulfur active materials into electrolytes and low electrical conductivity of redox products. In this study, we report sulfur-based polymer microparticles as a new cathode material of Li-S batteries, which were synthesized via one-pot reaction of elemental sulfur and vinyl phosphonic acid. The spherical microparticles containing various sulfur allotropes with phosphonate acid moieties at the surfaces to alleviate the volumetric change and promote polysulfides conversion kinetics. The resultant Li-S cells could deliver a high discharge capacity of 1529 mAh·g-1 at 0.05 C and outstanding rate capability up to 7 C. |
| 저자 |
강한얼, 박문정
|
| 소속 |
POSTECH |
| 키워드 |
sulfur microparticles; vulcanization; fast polysulfide conversion; high-energy batteries; flexible lithium-sulfur batteries
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| E-Mail |
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