(合肥工業(yè)大學(xué) 化工學(xué)院，合肥 230009)
摘 要: 以甘氨酸為絡(luò)合劑制備鋰離子電池正極材料Li1+xV3O8。采用XRD﹑SEM﹑DSC和TGA-DTA測試了Li1+xV3O8的結(jié)構(gòu)、形貌和性質(zhì)。結(jié)果表明：在420 ℃下焙燒20 h，可以得到正極材料Li1+xV3O8 ，該材料具有良好的結(jié)晶度和熱穩(wěn)定性。電化學(xué)測試表明：此方法合成的Li1+xV3O8在室溫下以10 mA/g的電流放電時，首次放電容量高達(dá)360 mA∙h/g, 循環(huán)30次后容量衰減約9.7%，循環(huán)性能良好；當(dāng)放電電流從10 mA/g增大到25 mA/g時，其容量損失約50.5%。
關(guān)鍵字: 正極材料；Li1+xV3O8；甘氨酸；比容量；循環(huán)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
