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中文摘要：
为提高LiFePO4的电化学性能，通过固相合成法制备了掺碳的LiFePO4正极材料，并用XRD、SEM、电化学工作站及充放电测试等对样品的性能进行了研究分析。结果表明，少量的碳掺杂并未改变LiFePO4的晶体结构但显著改善了其电化学性能，LiFePO4／C样品的粒度较小，粒径分布均匀，0．1C首次放电比容量为141．9mAh／g，循环50次后容量下降了11．2mAh／g，以1C倍率首次放电比容量为126．5mAh／g，循环50次后容量保持率为87．2％。
英文摘要：
To improve the electrochemical properties of LiFePO4, carbon doped LiFePO4 is prepared by solid phase reaction route. The samples are tested by XRD, SEM, electrochemical charge and discharge tests and A.C. impedance tests. The results show that the carbon dopants don＇t affect the structure of the samples but considerably improve their electrochemical performance. LiFePO4/C samples have an initiate capacity of 141.9mAh/g at 0. 1C, which decreases by 11.2mAh/g after 50 cycles. The specific capacity is 126.5mLAh/g at 1C and maintains the rate of 87. 2%after 50 cycles.
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