Novel carbon nanofiber-cobalt oxide composites for lithium storage with large capacity and high reversibility

作者：Yao, Wen-Li; Wang, Jiu-Lin; Yang, Jun^*; Du, Guo-Dong

来源：Journal of Power Sources, 2008, 176(1): 369-372.

DOI：10.1016/j.jpowsour.2007.10.073

• Co3O4
• carbon nanofiber-Co3O4 composite
• anode material
• Li-ion batteries

Carbon nanofiber (CNF)-Co3O4 composites were prepared by the calcination of CNF-Co(OH)(2) composite precursors under argon atmosphere. SEM and TEM observations revealed that Co3O4 particles in the size of ca. 30-50 nm were highly dispersed and attached on the surface of the reticular CNF and all around. As for electrode materials, the CNF-Co3O4 composite demonstrated very high reversible capacity (more than 900 mAh g(-1) in the initial 50 cycles) and excellent electrochemical cycling stability. The improved cycle performance of the CNF-Co3O4 composite can be attributed to its unique reticular and morphology-stable composite texture with high dispersion of Co3O4 nanoparticles on the CNF that provides excellent electronic and ionic conduction pathway for the electrochemical processes.

• 出版日期2008-1-21
• 单位上海交通大学