| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 봄 (04/12 ~ 04/13, 대전컨벤션센터) |
| 권호 |
37권 1호 |
| 발표분야 |
대학원생 구두발표 |
| 제목 |
Mesoporous graphene-silica composite for Li-S battery |
| 초록 |
Despite the promising theoretical capacity (1675 mAh/g) of elemental sulfur, Li-S battery systems suffer from the insulating nature of elemental sulfur and Li2S, the low retention of sulfur in cathode due to the lithium polysulfide dissolution and thus the passivation of the Li anode. In order to circumvent these problems, we synthesized mesoporous graphene-SiO2 (m-GS) composite with the aim of designing a cathode structure with high sulfur retention and consequently high charge/discharge rate capability. A SBA-15-like ordered mesoporous silica structure was introduced onto the surface of functionalized graphene via ternary cooperative assembly among triblock copolymer, silica precursor, and graphene. We expect that a) the well-defined mesoporous silica structure exhibits high polysulfide retention and allows for fast reaction kinetics of sulfur, b) the graphene alleviates the insulating nature of silica and sulfur and c) the synthesis of m-GS is conducted under mild conditions. |
| 저자 |
김경환1, 전영시2, Kimberly See3, Jeffrey Gerbec2, Galen D. Stucky3, 정희태4
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| 소속 |
1KAIST, 2Univ. of California, 3Santa Barbara, 4Mitsubishi Chemical USA |
| 키워드 |
mesoporous silica; graphene; lithium; rechargeable battery; Li-S battery
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| E-Mail |
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