中文摘要：

应用液相沉淀法．固相烧结法制备高密度的LiFePO4／C及纯相LiFePO4．X射线衍射、扫描电镜、傅立叶红外光谱仪、电化学性能测试表明：该样品具有单一的橄榄石结构和3．4V左右的放电平台，掺碳的LiFePO4具有更优良的性能，粒度较小粒径分布均匀，振实密度达1．46g／cm^3，0．1C首次放电比容量为144．6mAh／g，循环20次后容量保持率为93．2％，1C倍率首次放电比容量为133．5mAh／g，循环20次后容量下降8．76％．

英文摘要：

Carbon-doped LiFePO4/C and pure phase LilTePO4 cathode materials were prepared by liquid-state precipitation reaction. The results of XRD, SEM, elemental analysis, FTIR and A. C. impedance tests show that the samples have had olivine structure and a 3.4V discharge platform. The tapped density of LiFePO4/C sample could reach 1.46g/cm^3, the initiate discharge capacity is 144.6mAh/g at 0.1 C, which remained capacity is 93. 2% after 20 cycles. The first discharge capacity is 133.5mAh/g at 1C and the capacity decreased 8.76% after 20 cycles.