中文摘要：

由CO还原FePO4和LiOH前驱体合成LiFePO4正极材料，应用XRD、SEM表征材料结构和形貌、充放电曲线测试电化学性能．结果表明，LiOH过量5％合成的LiFePO4样品颗粒度约200nm，包覆碳后LiFePO4电极0．1C放电容量可达158mAh／g．高温现场XRD对该合成反应作实时监控，借助时间分辨图谱分析，检测出Li3Fe2（PO4）3中间物．动力学研究表明成核与生长是该合成过程的速控步骤，反应活化能为89．44kJ／mol．

英文摘要：

LiFePO4 cathode material was synthesized by CO reducing FePO4 and LiOH precursors. The structure, morphology and electrochemical performances of such LiFePO4 material were characterized by XRD, SEM and charge-discharge tests. It was shown that the particle size of the LiFePO4 synthesized with 5% excess of LiOH in the precursor was about 200 nm. By carbon coating, the LiFePO4 electrode was able to deliver a reversible capacity of 158 mAh. g^-1 at 0.1C discharge rate. Temperature-programmed X-ray diffraction was employed to monitor the reaction during the formation of LiFePO4, and Li3 Fe2 （ PO4 ） 3 was found to be an intermediate by analyzing the time-resolved XRD patterns. Kinetic study indicates that nucleation and their growth is the rate-determining step in the process of the reaction and the activation energy of this reaction was 89.44 k J/mol.