水热法合成高纯TiO_2(B)纳米线及其锂电性能的研究

Hydrothermal synthesis of high-purity TiO_2(B) nanowires and their Li-ion batteries performance

以钛酸丁酯为钛源,采用水热法合成了高纯度的TiO2(B)纳米线。用X射线衍射(XRD),扫描电镜(SEM),透射电镜(TEM)以及激光拉曼光谱仪(Raman)对其晶体结构、形貌和纯度进行了表征与分析,并对其锂离子电池性能进行了测试。结果表明,通过该方法得到的一维TiO2(B)纳米线纯度达到了93.2%。该材料表现出了优异的电化学性能,在0.2C下首次放电比容量达254.8 mAh/g,且循环性能良好,100次循环后容量损失只有约7.84%。

The TiO2(B)nanowires with high purity had been successfully synthesized by a facile hydrothermal route using tetrabutyl titanate as titanium source.The crystal structure,morphology and purity of nanowires were characterized and analyzed using X-ray diffraction(XRD),scanning electron microscopy(SEM),Transmission electron microscopy(TEM)and laser Raman spectroscopy(Raman)respectively,and their lithium-ion battery performance was also tested.The results indicate that the purity of the one-dimensional TiO2(B)nanowires obtained by this method could reach to 93.2%.The obtained TiO2(B)nanowires show excellent electrochemical properties,its first discharge specific capacity can get up to 254.8mAh/g at 0.2Cwith good cycle performance,the capacity loss after 100 cycles is about 7.84%.