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

页码：553 / 557

页数：5

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