论文部分内容阅读
以水解沉淀法制备得到的TiO_2·n H_2O为钛源,采用强碱水热法得到的钛酸纳米簇和以TiO_2为钛源制得的产物相比具有更加优异的电化学性能。在50 m A/g的电流密度下首次放电比容量高达425.6 m Ah/g,在1000 m A/g的大倍率下循环3000次后的比容量稳定在115 m Ah/g,库伦效率几乎为100%。因此,该材料作为大功率长寿命锂离子电池的负极材料,具有很好的应用前景。
The TiO_2 · n H_2O prepared by hydrolytic precipitation method is the source of titanium, and the titanate nanoclusters obtained by the strong alkali hydrothermal method have more excellent electrochemical performance than the products obtained by using TiO_2 as the titanium source. The specific capacity of the first discharge at the current density of 50 m A / g was as high as 425.6 m Ah / g, and the specific capacity after being cycled 3000 times at a large magnification of 1000 m A / g was stable at 115 mAh / g. The coulombic efficiency was almost 100%. Therefore, the material as a high-power long-life lithium-ion battery cathode material, has a good prospect.