Effects of carbon sources on electrochemical performance of Li4Ti5O12/C composite anode materials

• Published in: Journal of Central South University of Technology. Science & technology of mining and metallurgy Vol. 17; no. 6; pp. 1207 - 1210
• Main Authors: Liu, Ping, Zhang, Zhi-an, Li, Jie, Lai, Yan-qing
• Format: Journal Article
• Language: English
• Published: Heidelberg Central South University 01.12.2010
• Subjects: Engineering; Metallic Materials; Ti; carbon; anode material; lithium-ion battery; Li; O; electrochemical performance
• ISSN: 1005-9784; 1993-0666
• DOI: 10.1007/s11771-010-0620-3

Li 4 Ti 5 O 12 /C composite materials were synthesized by two-step solid state reaction method with glucose, sucrose, and starch as carbon sources, respectively. The effects of carbon sources on the structure, morphology, and electrochemical performance of Li 4 Ti 5 O 12 /C composite materials were investigated by SEM, XRD and electrochemical tests. The results indicate that carbon sources have almost no effect on the structure of Li 4 Ti 5 O 12 /C composite materials. The initial discharge capacities of the Li 4 Ti 5 O 12 /C composite materials are slightly lower than those of as-synthesized Li 4 Ti 5 O 12 . However, Li 4 Ti 5 O 12 /C composite materials show better electrochemical rate performance than the as-synthesized Li 4 Ti 5 O 12 . The capacity retention (79%) of the Li 4 Ti 5 O 12 /C composite materials with starch as carbon source, is higher than that of Li 4 Ti 5 O 12 /C composite materials with glucose and sucrose as carbon source at current rate of 2.0 C .