期刊
JOURNAL OF POWER SOURCES
卷 190, 期 2, 页码 553-557出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2009.01.067
关键词
Lithium-ion battery; Thermal stability; Natural graphite electrode; Carbon coating
资金
- Division of Advanced Batteries in the NGE [10028960]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10028974] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6A1908] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
To investigate the effect of non-graphitic carbon coatings on the thermal stability of spherical natural graphite at elevated temperature, differential scanning calorimetry (DSC) and X-ray diffraction (XRD) measurements are performed. Data from DSC Studies show that the thermal stability of the Surface modified natural graphite electrode is improved. The surface modification results in a decrease in the BET surface specific area. Ail improvement in COUlombic efficiency and a reduction in irreversible capacity are also observed for the carbon-coated natural graphite. X-ray diffraction analysis confirms that carbon coating alleviates the release of intercalated lithium from natural graphite at an elevated temperature and acts as a protective layer against electrolyte attack. (C) 2009 Elsevier B.V. All rights reserved.
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