|
|||||
|
|
Effect of carbon coating on thermal stability of natural graphite spheres used as anode materials in lithium-ion batteries |
|
| Authors: | Yoon-Soo Park Hyun Joo Bang Seh-Min Oh Yang-Kook Sun Sung-Man Lee |
| Affiliation: | aDepartment of Advanced Materials Science and Engineering, Kangwon National University, Chuncheon Kangwon-Do 200-70, Republic of Korea;bDepartment of Chemical Engineering, Center of Information and Communication Materials, Hanyang University, Seoul 133-791, South Korea;cCarbonix, Inc., 938-3, Taegok-ri Buk-myeon, Jeongup-si Jeonbuk, 580-812, Republic of Korea |
| 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. An 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. |
| Keywords: | Lithium-ion battery Thermal stability Natural graphite electrode Carbon coating |
| 本文献已被 ScienceDirect 等数据库收录！ | |