An urchin-like graphite-based anode material for lithium ion batteries

• Published in: Electrochimica acta Vol. 55; no. 19; pp. 5519 - 5522
• Main Authors: Li, Xinlu, Yoon, Seong-Ho, Du, Kun, Zhang, Yuxin, Huang, Jiamu, Kang, Feiyu
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 30.07.2010; Elsevier
• Subjects: Anode materials; Applied sciences; Carbon nanotubes; Chemical vapor deposition; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Fluid dynamics; Graphite; Iron; Lithium ion batteries; Micrometers; Turbulence; Lithium ion batteries; Carbon nanotubes; Chemical vapor deposition; Graphite; Anode materials; Particle size; Anode; Organic carbonate; Secondary cell; Electrode material; Discharge charge cycle; Surface structure; Particle size distribution; Transmission electron microscopy; Morphology; Lithion ion batteries; Electrical characteristic; Electrochemical impedance spectroscopy
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2010.04.101

In situ preparation of carbon nanotubes on the surface of spherical graphite particles is made by chemical vapor deposition, resulting in an “urchin-like” hybrid material. TEM and SEM images show that carbon nanotubes are herringbone with turbulent layered structure, less than 100 nm in diameter and several micrometers in length in the average. The hybrid's use as an anode material in lithium ion batteries is examined using constant current charge–discharge tests, which prove that carbon nanotubes oriented on the surface effectively improve the reversible capacity. Cyclic voltammogram shows that there is no cathodic peak for the reaction of the Fe catalyst with Li + in the charge-charge process in 0.0–1.6 V vs. Li/Li + potential range.