不同间距TiO $_2$纳米管、Fe $_2$ O $_3$修饰及其在锂离子电池中的应用
TiO$_2$ nanotubes with different spacing, Fe$_2$O$_3$ decoration and their evaluation for Li-ion battery application
摘要：
在目前的工作中，我们报告了使用有组织的TiO $_2$纳米管层与一个规则的管间间距的高度定义的$α$ -Fe $_2$ O $_3$纳米针在间隙中的生长。然后将这些$α$ $_2$ O $_3$修饰的TiO $_2$ NT用于锂离子电池应用，并与经典的密堆积NT进行比较，所述经典的密堆积NT都用不同量的纳米级$α$ $_2$ O $_3$修饰。我们表明，管到管间距的纳米管允许均匀装饰的个别纳米管与规则排列的赤铁矿纳米针。管间距也有利于电解质渗透以及产生更好的离子扩散。而裸露的紧密堆积的NT显示出更高的电容，例如，71 $μ$ Ah cm-2，而不是裸露的间隔NT，54 $μ$ Ah cm-2，具有第二金属氧化物$α$ -Fe $_2$ O $_3$的分级装饰显著增强了锂离子电池性能。即，具有$α$ -Fe $_2$ O $_3$装饰的间隔纳米管具有477 $μ$ Ah cm-2的面积电容，即，显示出高达约8倍的电容。然而，具有$α$ -Fe $_2$ O $_3$装饰的密堆积NT的面积电容在208 $μ$ Ah cm-2处饱和，即，限制在3倍左右。
英文摘要：
In present work, we report on the use of organized TiO$_2$ nanotube layers with a regular intertube spacing for the growth of highly defined $α$-Fe$_2$O$_3$ nano-needles in the interspace. These $α$-Fe$_2$O$_3$ decorated TiO$_2$ NTs are then explored for Li-ion battery applications and compared to classic close-packed NTs that are both decorated with various amounts of nanoscale $α$-Fe$_2$O$_3$. We show that nanotubes with tube-to-tube spacing allow a uniform decoration of individual nanotubes with regular arrangements of hematite nano-needles. The tube spacing also facilitates the electrolyte penetration as well as yields better ion diffusion. While bare close-packed NTs show higher capacitance, e.g., 71 $μ$Ah cm-2 than bare spaced NTs with e.g., 54 $μ$Ah cm-2, the hierarchical decoration with secondary metal oxide, $α$-Fe$_2$O$_3$, remarkably enhances the Li-ion battery performance. Namely, spaced nanotubes with $α$-Fe$_2$O$_3$ decoration have an areal capacitance of 477 $μ$Ah cm-2, i.e., show up to nearly ~8 times higher capacitance. However, the areal capacitance of close-packed NTs with $α$-Fe$_2$O$_3$ decoration saturates at 208 $μ$Ah cm-2, i.e., is limited to ~3 times increase.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
