摘要
以Li2CO3、TiO2和硬脂酸为原料,采用高温固相法制备出Li4Ti5O12/C复合材料。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、恒流充放电测试等测试方法对Li4Ti5O12的结构、形貌和电化学性能进行了研究。结果表明:硬脂酸的添加使合成的Li4Ti5O12/C复合材料具有良好的高倍率电化学性能,其0.1C倍率下首次放电比容量达到153.6mAh/g,在2C倍率下首次放电比容量可达到134.4mAh/g。
Composite material Li4Ti5O2/C synthesized by high temperature solid--state method with designed process which made by Li2CO3, TiO2 and stearic acid. A study on the structural characteristics, surface morphology and electrochemical performance of LiaTi5O12/C were carried out systemically and in detail by X-ray radial diffraction, Scanning electron microscope, galvanostatic discharge-charge test.The results showed that the doped stearic acid promoted the high rate electrochemical performance of Composite material Li4Ti5O12/C. Its first discharge capacity was 153.6 mAh/g at 0.1C and 134.4 mAh/g at 2C.
出处
《四川有色金属》
2013年第3期51-53,共3页
Sichuan Nonferrous Metals
关键词
固相法
负极材料
电化学性能
硬脂酸
solid-state method
anode material
electrochemical performance
stearic acid
