Li/graphite whisker vs. Li/natural graphite as negative electrodes for lithium-ion rechargeable cells: A comparative electrochemical study
Book
·
OSTI ID:33582
- AIST-Ministry of International Trade and Industry, Osaka (Japan). Osaka National Research Inst.
- Nikkiso Co., Ltd., Shizuoka (Japan). R and D Center
Comparative electrochemical intercalation of lithium by electrochemical methods into Graphite whiskers (2GWH-2A) and into natural graphite have been investigated in 1M LiClO{sub 4}/EC + DEC. The reversible capacity was 363 mAh/g in the case of 2GWH-2A and the coulombic efficiency was 99%, 250 mAh/g for natural graphite. For understanding the mechanism of intercalation of lithium into the carbon, the authors use slow Cyclic voltammetry. When measuring the slow cyclic voltammogram of both 2GWH-2A and natural graphite, 5 cathodic peaks could be seen. The differential chronopotentiogram obtained by derivative of experimental charge-discharge curve shows just 3 peaks. This difference suggests a new site of lithium storage.
- OSTI ID:
- 33582
- Report Number(s):
- CONF-940529--; ISBN 1-56677-080-7
- Country of Publication:
- United States
- Language:
- English
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