| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 부산 벡스코(BEXCO)) |
| 권호 |
25권 1호 |
| 발표분야 |
[콜로이드·계면화학] 콜로이드 계면화학의 최신 연구 및 개발 동향 |
| 제목 |
High-Conversion Reduction Synthesis of Porous Silicon for High-Energy Lithium Batteries |
| 초록 |
The conventional magnesiothermic reduction (MR) of silica under static conditions limits the yield of porous silicon (pSi) and sometimes produces low-purity of pSi owing to limited mass transfer and many side reactions. Hence, we devise a rotational MR (R-MR) system with rapid magnesium transport in which a uniform Mg/SiO2 molar ratio is readily achievable, and a short reaction time can be applied. The R-MR process has an extremely high yield of pSi at almost complete conversion, whereas side reactions are substantially suppressed. The carbon-coated pSi/C samples and their hybrids with graphite (pSi/C@Gr) composites demonstrate stable cycling performance for 300−600 cycles at high capacity with high cycling efficiency. Therefore, high-conversion R-MR can be a very efficient and scalable process for obtaining pSi for use in carbon composites (such as pSi/C and pSi/C@Gr) that offer outstanding cycling performance in highcapacity anodes for high-energy LIBs. |
| 저자 |
이정규 |
| 소속 |
동아대 |
| 키워드 |
Porous silicon; Anode; Lithium batteries
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| E-Mail |
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