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[摘要]：Here, a novel architecture of a core-shell structured FeF3@Fe2O3 composite with particle size of 100-150 nm and tunable Fe2O3 content is synthesized by a simple heat treatment process utilizing FeF3 with fine network structure as precursor. The structure, morphology and electrochemical performance of the pristine FeF3 and the FeF3@Fe2O3 composites are studied by XRD, SEM, TEM and discharge-charge measurements. XRD results show that the Bragg peaks of the FeF3@Fe2O3 composites are well indexed to FeF3 and Fe2O3. SEM and TEM images reveal the core-shell structure of the composites. The comparison of the electrochemical performance between the pristine FeF3 and the FeF3@Fe2O3 composites reveals that the in situ Fe2O3 coating (even with small amount, 0.6-5.2 wt%) has great influence on the improvement of electrochemical performance. |
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