为提高Li4Ti5Oi2的导电性和倍率性能,应用二步固相法制备了Nb掺杂的Li4 Ti495Nb0.05O12负极材料,X射线衍射、扫描电镜、激光粒度分布仪、充放电测试、循环伏安和交流阻抗等测试结果表明,合成的样品具有单一的尖晶石结构和平稳的充放电平台,粒径分布均匀,Nb掺杂改性的Li4Ti5O12具有优良的电化学性能,0.1、0.5、1和10C首次放电比容量分别为174.1、159.7、147和123.3mAh/g.10C下,循环20次后容量保持为118.1mAh/g.
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