中文摘要：

通过在前驱体浆料中加入聚乙二醇（PEG-6000）、聚乙二醇辛基苯基醚（TritonX-100）和钛酸酯偶联剂（TC-Wt）等不同类型的添加剂。对利用固-液流变相法合成的LiFePO4／C复合材料进一步改性。利用X射线衍射仪和扫描电子显微镜对LiFePO4／C复合材料的结构和形貌进行了表征，利用电化学测试系统对材料的电化学性能进行测试。结果表明：加入三种不同添加剂的LiFeP04／C复合材料团聚减少，颗粒变细。添加了TC—Wt合成的样品粒径最小。添加了PEG-6000，TritonX-100和TC—Wt合成的样品在1C时的放电比容量分别为133．5，137．6，140．6mAh／g，5C时的放电比容量分别为101．5，111．3，127．6mAh／g，空白样的比容量均低于加入三种不同添加剂的样品，在1C和5C时分别为129．8和99．6mAh／g。

英文摘要：

LiFePO,/C synthesized by solid-liquid fluid phase method, was modified by adding three different additives of polyethylene glycol （PEG-6000）, octyl polyethylene glycol phenyl ether （Triton X-100） and titanate coupling agent TC-Wt to precursor slurry. The structure and morphology of the LiFePO,/C ball composite materials were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The electrochemical performance of material was tested by electrochemical test system. The reunion of the LiFePO4/C composite materials with three additives weakens obviously and the size of particles is refined. Comparing with the other samples, the material with TC-WT obtained the minimum particle size. The initial discharge specific capacities of the samples adding PEG-6000, Triton X-100, and TC-Wt are 133.5, 137.6, 140.6 mAh/g at 1 Cand 101.5, 111.3,127.6 mAh/g at 5 C, respectively. Comparing with the other samples adding three different additives, the specific capacities of the bank sample lower than others are 129.8 and 99.6 mAh/g.