LiFePO₄/Porous Carbon Nanocomposite Cathode Material for Lithium Ion Batteries

Abstract:

A LiFePO₄/porous carbon nanocomposite was synthesized by using spontaneous precipitation combined with solid-state reaction. The microstructure, morphology and electrochemical properties of as-prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), differential thermal analysis (TGA) and charge-discharge cycling tests. The results reveal that LiFePO₄ particles are well-dispersed into porous carbon framework. The initial discharge of nanocomposite is 143 mAh g^-1 at 0.1 C and 114 mAh g^-1 at 1 C with satisfactory capacity retention. The superior electrochemical performance of the composites can be attributed to the nano-confined effect of conducting porous carbon and the nano-size of LiFePO₄ particles in LiFePO4/porous carbon nanocomposite.

• Periodical: Materials Science Forum (Volume 722)
• Pages: 11-16
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.722.11
• Online since: June 2012
• Authors: Jin Kun Liu, Li Zhen Fan
• Keywords: LiFePO₄, Lithium-Ion Battery, Nanocomposite Cathode Materials, Porous Carbon

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