| 학회 | 한국화학공학회 |
| 학술대회 | 2008년 가을 (10/23 ~ 10/24, 부산 BEXCO) |
| 권호 | 14권 2호, p.3384 |
| 발표분야 | 재료 |
| 제목 | Synthesis of the lithium titanate(Li4Ti5O12) particles in supercritical methanol |
| 초록 | Spinel lithium titanate (Li4Ti5O12) is widely used as an anode material in the lithium-ion batteries due to its small volume change during the intercalation/deintercalation of lithium ions and its long life-cycle. In conventional method, Li4Ti5O12 particles have been prepared by the solid-state reaction, which requires the high reaction temperature (700 ~ 1000 °C) and long reaction time (10 ~ 24 hrs). In this study, Li4Ti5O12 was prepared in the supercritical methanol and supercritical water. Li-Ti-O precursors were prepared by mixing the lithium hydroxide aqueous solution and 2-propanol containing titanium isopropoxide, and Li-Ti-O precursors were redispersed in water or methanol. The reaction was performed at 400 °C and 300 bar. The molar ratio of lithium hydroxide and titanium isopropoxide was varied from 4 : 5 to 2 : 1. In addition, the effect of reaction medium on the crystalline structure of the product was also investigated. |
| 저자 | 이영호, 안기호, 송봉근, 이윤우 |
| 소속 | 서울대 |
| 키워드 | Li4Ti5O12; spinel; supercritical fluid; particles |
| 원문파일 | 초록 보기 |
