(合肥工业大学 化工学院，合肥 230009)
摘 要: 以甘氨酸为络合剂制备锂离子电池正极材料Li1+xV3O8。采用XRD﹑SEM﹑DSC和TGA-DTA测试了Li1+xV3O8的结构、形貌和性质。结果表明：在420 ℃下焙烧20 h，可以得到正极材料Li1+xV3O8 ，该材料具有良好的结晶度和热稳定性。电化学测试表明：此方法合成的Li1+xV3O8在室温下以10 mA/g的电流放电时，首次放电容量高达360 mA∙h/g, 循环30次后容量衰减约9.7%，循环性能良好；当放电电流从10 mA/g增大到25 mA/g时，其容量损失约50.5%。
关键字: 正极材料；Li1+xV3O8；甘氨酸；比容量；循环性能
（College of Chemical Engineering, Hefei University of Technology,Hefei 230009, China）
Abstract: C2H5NO2 was used to synthesize the cathode material Li1+xV3O8. The structure, morphology and characteristics of Li1+xV3O8 were investigated by XRD, SEM, DSC and TGA-DTA. The results show that the material Li1+xV3O8 with good crystallization degree and good thermal stability is obtained at 420 ℃. The electrochemistry test of Li1+xV3O8 indicates that the material obtained has a discharge capacity of 360 mA∙h/g at room temperature with a current of 10 mA/g, and the capacity is only decreased by 9.7% after 30 cycles, which indicates the material has a good cycle performance. The capacity is decreased by about 50.5% when the discharge current increases from 10 mA/g to 25 mA/g.
Key words: cathode material;Li1+xV3O8；; glycin; specific capacity; cycle performance
