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.

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

“…In particular, the low cost and eco-friendliness of carbon materials have advantages for large-scale commercial production. Common carbon coating materials include porous carbon [138] , carbon nanowires [139] , graphene [140] and carbon nanotubes [141] .…”