| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 부산 벡스코(BEXCO)) |
| 권호 |
25권 1호 |
| 발표분야 |
포스터-에너지저장·변환 |
| 제목 |
Separator Modification with Layered Double Hydroxide Quantum Dots for Enhanced Performance of Li-S Battery |
| 초록 |
We report a bifunctional modified polypropylene (PP) covered with exfoliated cobalt-aluminum layered double hydroxide quantum dots (LDH-QDs) assembled with nitrogen-doped graphene (NG) to boost the electrochemical performance of lithium-sulfur batteries (LSBs). Conductive NG provides physical barriers for polysulfides and landing points as well as greatly improve the conductivity of LDH-QDs with abundant active sites, eg., Co2+ and hydroxide groups, which not only exhibit strong chemical appeal with polysulfides, but also efficiently accelerate the kinetic process for redox conversion. Due to catalytic effect as well as chemical and physical absorption, the modified cell showed an initial discharge capacity of 1227.48 mAh g-1 at 0.1 C along with low capacity decay rate of 0.041% per cycle over 1200 cycles at 1.0 C. This research was supported by a grant from R&D Program of the Korea Railroad Research Institute. |
| 저자 |
LIU QING1, 박호석2, Xiaotong Han2, 김보경1
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| 소속 |
1한국철도기술(연), 2성균관대 |
| 키워드 |
Layered double hydroxide; 2D quantum dots; Functionalized separator; Redox promoter; Lithium-sulfur battery
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| E-Mail |
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