球形TiNb2O7的固相法制备和嵌脱锂离子性能研究
摘要：摘要通过湿法研磨和喷雾干燥法制备球形前驱体,采用高温固相法合成球形TiNb2O7材料,并对其进行XRD、SEM表征和电化学性能测试。结果表明,制备的TiNb2O7是由一次颗粒组成的二次球形颗粒,平均粒径约4 ~ 6 μm,内部存在大量孔隙;以0.1 C在0.8 ~ 3.0 V电压下充放电,球形TiNb2O7材料首次放电比容量为316.5 mAh/g,首次库伦效率为99.7%,1 C倍率下经过100次循环后,容量保持率为82.0%,10 C倍率下的放电比容量为234.7 mAh/g,具有良好的倍率性能。
Abstract:：The precursor of spherical TiNb2O7 was prepared by wet grinding process and spray drying process. The TiNb2O7 materials were synthesized by the solid-phase method and characterized by XRD, SEM and electrochemical tests. The results showed that the TiNb2O7 materials were secondary particles composed of primary particles with an average size of about 4-6 μm and numerous pores inside. The TiNb2O7 materials exhibited a high initial specific discharge capacity of 316.5 mAh/g at 0.1 C rate in 0.8-3.0 V with an initial Coulombic efficiency of 99.7%. Furthermore, TiNb2O7 had a good rate capacity, which still reached 82.0% after 100 cycles at 1 C, and had a specific discharge capacity of 234.7 mAh/g at 10 C.
中文标题：球形TiNb2O7的固相法制备和嵌脱锂离子性能研究
英文标题：Preparation and Li+ Intercalation/Deintercalation Performance of Spherical TiNb2O7 by Solid-Phase Method
发表时间：2023-07-26
作者：
李倩倩, 康宗维, 李鹏
作者简介：
李倩倩（1987-）,女,硕士,工程师,主要从事锂离子电池材料研究。
关键词：锂离子电池,TiNb2O7,固相法,电化学性能,
Key words：lithium-ion battery,TiNb2O7,solid-phase method,electrochemical performance,
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