Synthesis and Characterization of Nanosized a-LiFeO₂ with Increased Electrochemical Activity

摘要

In this work, nanosized LiFeO2 were synthesized by a simple low-temperature solid state method.The obtained LiFeO2 nanoparticles were investigated by the measurements of X-ray diffractionpattern, scanning electronic microscopy, transmission electron microscope and electrochemicalperformance. Electrochemical measurements showed that the initial discharge capacity was 277.9,-1 188.4, and 158.2 mAh g at 0.1 C, 1 C, and 2 C, respectively. Meanwhile, the LiFeO2 nanoparticles-1exhibited improved cycle stability (123 mAh g at 2 C after 60 cycles). The high capacity, improvedrate performance and cycle stability can be attributed to the smaller particle sizes, which can facilitatethe contact between active materials and the electrolyte, enhance lithium and electron transport duringcycling.