以水溶性酚醛树脂为碳源,Li2CO3为锂源,纳米FePO4前躯体为铁源和磷源,以水为介质,采用湿法研磨混合均匀,然后通过高温固相法制备出纳米磷酸亚铁锂/碳( LiFePO4/C)复合材料.采用XRD、SEM、TEM、TG和拉曼光谱对该复合材料进行了表征,并研究了其电化学性能.结果表明,制备的LiFePO4/C纳米颗粒为类球形,表面均匀地包覆了一层约5 nm厚的碳层,作为锂离子电池正极材料表现出良好的倍率性能和循环性能,在0.2 C(1 C=170 mAh·g-1)、0.5C、1C、2C、5C、10 C下首次放电容量分别为151、150、146、142、132、119mAh·g-1,20 C下的首次放电容量也达105 mAh·g-1,且循环50次几乎无衰减.
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