Preparation and Characterization of Spherical Carbon Composite for Use as Anode Material for Lithium Ion Batteries

• Published in: Bulletin of the Korean Chemical Society Vol. 31; no. 5; pp. 1331 - 1335
• Main Authors: Ahn, Byoung-Hoon, Lee, Sung-Man
• Format: Journal Article
• Language: English
• Published: 대한화학회 20.05.2010
• Subjects: 화학
• ISSN: 0253-2964; 1229-5949
• DOI: 10.5012/bkcs.2010.31.5.1331

A novel spherical carbon composite material, in which nanosized disordered carbons are dispersed in a soft carbon matrix,has been prepared and investigated for use as a potential anode material for lithium ion batteries. Disordered carbons were synthesized by ball milling natural graphite in air. The composite was prepared by mixing the ball-milled graphite with petroleum pitch powder, pelletizing the mixture, and pyrolyzing the pellets at 1200 oC in an argon flow. The ballmilled graphite consists of distorted nanocrystallites and amorphous phases. In the composite particle, nanosized flakes are uniformly distributed in a soft carbon matrix, as revealed by X-ray diffractometer (XRD) and transmission electron microscopy (TEM) experiments. The composite is compatible with a pure propylene carbonate (PC) electrolyte and shows high rate capability and excellent cycling performance. The electrochemical properties are comparable to those of hard carbon. KCI Citation Count: 1