| 학회 |
한국재료학회 |
| 학술대회 |
2018년 가을 (11/07 ~ 11/09, 여수 디오션리조트) |
| 권호 |
24권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Tin Sulfide Modified Separator for Enhanced Electrochemical Performance of Lithium-Sulfur Batteries |
| 초록 |
Lithium sulfur batteries (Li-S) are considered as the most promising candidate for next generation energy storage devices due to their high theoretical energy density and relatively low-cost. However, the practical applications of Li-S batteries are hindered due to their poor electronic conductivity of sulfur and capacity degradation induced by the shuttle effect of lithium polysulfide (LiPSs). Herein, we demonstrate a tin sulfide (SnS2) modified separator for effective polysulfide adsorption during charge-discharge cycling in Lithium-Sulfur (Li-S) batteries. The Li-S cell made with SnS2 treated separator exhibits enhanced specific capacity of 1300 mAh g-1 at 0.2 C, and after 150 cycles maintains 1040 mAh g-1, while the cells with pristine separator offers only 897 mAh g-1. Very interestingly, the modified separator exhibits an excellent rate capability in Li-S cell (700 mAh g-1 at 5 C). The capacity retentions of SnS2 modified separator and pristine separator are found to be 75 % and 44 % respectively at 0.2 C. Further, excellent cycling performance of Li-S with modified separator was achieved at 2 C after 500 cycles with a minimum capacity decay rate of 0.0710 % per cycle. The remarkable capacity retention sulfur composite electrode is mainly attributed to incorporation of SnS2 in separator that acts as an effective polysulfide adsorbent during cycling. |
| 저자 |
Brindha Moorthy1, Soonho Kwon1, Joo-Hyung Kim1, P.Ragupathy2, Hyuck Mo Lee1, Do Kyung Kim1
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| 소속 |
1KAIST, 2CSIR-Central Electrochemical Research Institute |
| 키워드 |
Lithium-Sulfur batteries; Polysulfide; SnS2; modified separator.
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| E-Mail |
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