Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2004.04a
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- Pages.27-30
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- 2004
The electrochemical properties of hybrid carbon as a negative active material for lithium ion batteries
리튬이온전지용 음극 활물질 하이브리드형 탄소의 전기화학적 특성
- Yang, Dong-Bok (Department of Electrical & Electronic Eng., Dongshin University) ;
- Park, Yong-Pil (Department of Electrical & Electronic Eng., Dongshin University)
- Published : 2004.04.30
Abstract
Different types of hybrid negative materials on pitch based carbon and natural graphite for lithium ion batteries were studied. Two types of active materials were prepared, that is, pitch based graphite carbon, and pitch based carbon impregnating natural graphite. The specific capacity, capacity recovery in high temperature condition, and other electrochemical properties were achieved for these materials. We found that addition of natural graphite type to the pitch based carbon can significant1y improve the specific capacity and interfacial resistance. However, use of natural graphite will cause a serious capacity loss in the high temperature condition owing to its increasing interface resistance. The specific capacity ranged from 321 to 348 mAh/g and the maximum specific capacity was obtained in the case of pitch based carbon impregnating natural graphite.