采用乙二醇溶剂热法,以蔗糖为碳源,制备了橄榄石型纳米级LiFePO4/C复合正极材料,对其物相、形貌、结构,成分和性能进行了表征.结果表明,所制备的纳米LiFePO4/C的形貌为棒状,直径约为100nm,结晶度高、分散性好.LiFePO4的粒径细化和掺碳有利于提高LiFePO4正极材料的电化学性能,其首次充放电比容量(0.1 C)分别为166 mAh·g-1和164 mAh·g-1,充放电电压平台分别为3.45 V和3.40 V；在5 C大倍率放电下,经过20次循环,其比容量保持率为95.4％.
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