Effect of carbon coating on thermal stability of natural graphite spheres used as anode materials in lithium-ion batteries

被引：80
|
作者：
Park, Yoon-Soo [1 ]
Bang, Hyun Joo [2 ]
Oh, Seh-Min [3 ]
Sun, Yang-Kook [2 ]
Lee, Sung-Man [1 ]
机构：
[1] Kangwon Natl Univ, Dept Adv Mat Sci & Engn, Chuncheon Kangwon Do 20070, South Korea
[2] Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea
[3] Carbonix Inc, Jeongup Si Jeonbuk 580812, South Korea
来源：
JOURNAL OF POWER SOURCES | 2009年 / 190卷 / 02期
关键词：
Lithium-ion battery; Thermal stability; Natural graphite electrode; Carbon coating; ACCELERATING RATE CALORIMETRY; LITHIATED GRAPHITE; ELECTROCHEMICAL PERFORMANCE; INTERCALATED GRAPHITE; EXOTHERMIC REACTIONS; ELECTRODE MATERIALS; MORPHOLOGY; LI; REACTIVITY; BEHAVIOR;
D O I：
10.1016/j.jpowsour.2009.01.067
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：553 / 557
页数：5
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