采用高温固相反应法制备α-Fe2O3/C复合材料,运用X射线衍射（XRD）、扫描电子显微镜（SEM）、充放电测试、电化学阻抗谱对其结构和电化学性能进行了表征.充放电测试结果显示,α-Fe2O3/C复合材料循环50周时可逆充电容量为935.3 mAh？g-1,循环性能较商品化α-Fe2O3有显著改善.电化学阻抗谱测试结果显示,α-Fe2O3/C复合材料电极在首次嵌锂过程中分别出现了锂离子通过固体电解质相界面膜（SEI膜）的迁移、材料的电子电导率、电荷传递过程相关的半圆,并详细分析了它们的变化规律.%The α-Fe2O3/C composite was prepared by high-temperature solid-state reaction,its structure and electrochemical performance were characterized by X-ray diffraction（XRD）,scanning electron miscro-scopy（SEM）,charge/discharge test and electrochemical impedance spectroscopy（EIS）.The electrochemical test results indicated that the α-Fe2O3/C composite showed an reversible charge capacity of 935.3 mAh？g-1 after 50 cycles,and had better cycle performance compared with commercial α-Fe2O3.Electrochemical im-pedance spectroscopy test indicated that there appeared three semicircles respectively representing the Li-ion migration in solid electrolyte interface film（SEI film）,electrical conductivity and charge transfer in the first lithiation,and their evolutive principles were also investigated.
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