LiFePO_4纳米棒的合成与电化学性能

Synthesis and electrochemical performance of LiFePO_4 nanorods

采用水热-固相二步法合成了纳米棒状磷酸铁锂（LiFePO4）正极材料，并对晶体结构、形貌和性能进行了XRD、SEM、透射电子显微镜（TEM）和恒流充放电分析。利用水热法可合成纳米棒状磷酸亚铁[Fe3（PO4）2·H2O]前驱体，固相法可得到纯相LiFePO4纳米棒。在2．5～4．2V充放电，产物的1．0C、5．0C放电比容量分别为125mAh／g和104mAh／g，具有良好的高倍率性能。

Lithium iron phosphate（LiFePO4） nanorods were synthesized by a two-step method of hydrothermal combined with solid-state reaction. The crystal structure, morphology and performance were characterized by XRD, SEM, TEM and galvanostatie charge-discharge analyses. Fe3 （PO4）2·H2O precursor was synthesized by a facile hydrothermal method, then olivine phase pure LiFePO4 nanorods were obtained by a solid-state method. The product had fine hlgh-rate performance, when eharged-dlscharged in 2.5 - 4.2 V,its specific diseharge capacity was 125 mAh/g and 104 mAh/g at 1.0 C and 5.0 C,respeetively.