| 학회 |
한국화학공학회 |
| 학술대회 |
1998년 봄 (04/24 ~ 04/25, KOEX) |
| 권호 |
4권 1호, p.1421 |
| 발표분야 |
에너지/환경 |
| 제목 |
흑연화 탄소의 비가역 용량에 대한 표면 구조의 영향 |
| 초록 |
The effect of surface texture on irreversible capacities of graphitic carbons are studied using commercial carbons exhibiting a variety of morphology. While the irreversible capacity of high surface area flaky graphites is nearly proportional to the specific surface area, other graphites with highly compact morphology tend to show much bigger irreversible capacity per unit surface area. The effect of surface texture is even more dramatic when propylene carbonate(PC) is added to the electrolyte. A flaky graphite with high degree of crystallinity exhibits virtually no change in both reversible and irreversible capacity up to 40 volume % of PC, while some graphitic carbons undergo significant structural destruction even for 10 vol. %. The effect of PC on the lithium intercalation into various graphitic carbons is examined more thoroughly for EC/PC/Diethyl carbonate(DEC) 1M LiPF6 electrolyte with 50 vol. % DEC. The changes in both reversible and irreversible capacity loss are studied for the volume ratio of PC to total cyclic carbonate from 0 to 1. The observed changes are analyzed in terms of a structural parameter characterizing the difference in surface texture. The PC decomposition mechanism is also discussed.
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| 저자 |
정근창, 전송희, 이기영
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| 소속 |
엘지화학 기술 (연) |
| 키워드 |
lithium battery; graphite
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| E-Mail |
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| 원문파일 |
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