以MOF为前驱物的锂电负极材料Cr_2O_3合成及性能表征

Synthesis and Electrochemical Performance of Cr_2O_3 Anode Material Based on MOF as Precursor

采用基于铬离子构筑的金属有机骨架化合物(MIL-53-Cr、MIL-101-Cr、MIL-102-Cr)为模板,通过简单的煅烧处理制备出三种不同形貌的Cr2O3。实验结果表明以MIL-102-Cr作为前驱体制备的Cr2O3具有较规则的中空结构形貌,当其作为锂离子电池负极材料时展现出最优异的电化学性能,当电流为0.1 C时,首次放电容量为840 m Ah/g,在电流为1 C循环100次后,可逆容量可以保持在200 m Ah/g。

Based on chrome organic frameworks （MIL-53-Cr, MIL-101-Cr, MIL-102-Cr） as template, three kinds of porous CraO3 were prepared by a simple calcining treatment in air. The experiment results indicated that the Cr2O3 based on MIL-102-Cr as template had the regular hollow structure, when tested as anode material for lithium batteries, it had the best electrochemical performance. When at a rate of 0. 1 C, it delivered an exceeded capacity of 840 mAh/g. After 100 cycles achieved. at 1 C, comparable capacity of 200 mAh/g could be