采用两步法合成磷酸铁锂，第一步先以氯化铁、磷酸二氢铵和磷酸为原料，用水热法合成球状磷酸铁，并研究了温度、不同铁源对其形貌的影响；第二步将制得的磷酸铁与氢氧化锂、PEG-10000混合，在氮气气氛保护下，750℃高温烧制成磷酸铁锂。用X射线衍射（XRD）、扫描电子显微镜（SEM）等表征了磷酸铁及磷酸铁锂的纯度和形貌。制得的磷酸铁锂微球在0．1C充放电时，比容量达到143．5mAh／g。
A two-step method for synthesizing lithium iron phosphate microspheres was described. At first, Fe- PO4 microspheres were synthesized by a simple hydrothermal reaction using FeCl3 · 7H2O, NH4H2PO4 and HaPO4 as starting materials, and the effects of temperature, different iron source on the morphology of product was studied; the second step, as-prepared FePO4 microspheres were mixed with LiOH H20, and polyethyle- neglycol powders and heated under flowing nitrogen at 700℃ to obtain LiFePO4 microspheres coated with car- bon. X-ray diffraction （XRD）, scanning electron microscopy （SEM） have been used to characterize the compo- sition and morphology of the prepared microstructures. The Li ion battery performance of the synthesized LiFe- PO4 microspheres were measured, which shows a high capacity of 143.5mAh/g at rates of 0.1C.
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