Effect of carbon coating on thermal stability of natural graphite spheres used as anode materials in lithium-ion batteries
- Authors
- Park, Yoon-Soo; Bang, Hyun Joo; Oh, Seh-Min; Sun, Yang-Kook; Lee, Sung-Man
- Issue Date
- May-2009
- Publisher
- ELSEVIER
- Keywords
- Lithium-ion battery; Thermal stability; Natural graphite electrode; Carbon coating
- Citation
- JOURNAL OF POWER SOURCES, v.190, no.2, pp.553 - 557
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 190
- Number
- 2
- Start Page
- 553
- End Page
- 557
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/176876
- DOI
- 10.1016/j.jpowsour.2009.01.067
- ISSN
- 0378-7753
- Abstract
- 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.
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