Abstract: The olive-type LiFePO₄ was synthesized via sintering the amorphous LiFePO₄ obtained by chemical reduction and lithiation of FePO4, using VC as reducer and lithium acetate as lithium source in alcohol solution. The influences of sintering
conditions on the physical and electrochemical properties of resulting LiFePO₄ were investigated. XRD and SEM tests show that increasing the sintering temperature and time leads to higher crystallinity, but to a larger particle size. The electrochemical property of LiFePO₄ sintered at 600℃ for 2h is the best, its initial discharge capacity at 0.1C rate can reach 159mAh﹒ g^-1, its capacity after 50 charge-discharge cycles is nearly no decay.

Key words: lithium ion batteries, LiFePO4, cathode material