Preparation of different phase structure nano sized FePO4/C cathode material by ultrasonic-assisting and their electrochemical performance

Nano-sized FePO 4 ·2H 2 O/C and FePO 4 /C cathode materials with different phase composition were prepared by carbon black preoxidation and ultrasonic-assisting technique. Among all samples, amorphous structure has the best electrochemical performance.