期刊论文

Study of Carbon-Encapsulated Li3VO4 as Anode for Li-ion Batteries

中文

广州化学

1009-220X

2018

43

2

46-51

10.16560/j.cnki.gzhx.20180207

本校为第一机构

采用溶胶-凝胶法合成碳包覆Li3VO4复合材料（Li3VO4/C）,通过X-射线衍射仪（XRD）、扫描电子显微镜（SEM）、热重分析仪（TG）对其进行了表征,探究了该材料作为锂离子电池负极材料的电化学性能。结果表明,该材料具有良好的循环性能和优异的倍率性能。在1.25 C（1 C=400 m Ah/g）的电流密度下,其首次充电比容量为199.6 m Ah/g,循环150次后,其容量保持率为89.2%。此外,在充放电倍率分别为0.5、1、2、5、10 C时,其充电比容量分别为228.7、202、180.5、149.9、116.6 m Ah/g。

The carbon-encapsulated Li3VO4sample (Li3VO4/C) was prepared by a simple sol-gel method. The chemical composition and morphology of the Li3VO4/C was investigated by X-ray diffraction (XRD), thermogravimetric analysis (TG) and scanning electron microscopy (SEM). The electrochemical performance of Li3VO4/C as anode material for Li-ion batteries was studied. The results showed that Li3VO4/C presented good cycling stability and exceeding rate performance. The Li3VO4/C exhibited an initial charge capacity of 199.6 mAh/g (charge capacity) at the char...