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首页> 外文期刊>RSC Advances >Highly stable supercapacitive performance of one-dimensional (1D) brookite TiO2 nanoneedles
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Highly stable supercapacitive performance of one-dimensional (1D) brookite TiO2 nanoneedles

机译：一维（1D）Brookite TiO2纳尼的高度稳定的超级电容性能

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We report the highly stable supercapacitive performance of one-dimensional (1D) nanoneedles of brookite (β) TiO _(2) synthesized on a conducting glass substrate. The 1D β-TiO _(2) nanoneedles synthesized over a large area array utilizing hot-filament metal vapor deposition (HFMVD) were ～24–26 nm wide, ～650 nm long and tapered in a downward direction. X-ray photoemission spectroscopy (XPS) revealed their chemical properties and stoichiometric Ti and O composition. The 1D β-TiO _(2) nanoneedles execute as parallel units for charge storage, yielding a specific capacitance of 34.1 mF g ~(?1) . Electrochemical impedance spectroscopy revealed that the large surface area and brookite crystalline nature of the 1D nanoneedles provided easy access to Na ~(+) ions, and resulted in low diffusion resistance, playing a key role in their stable charging–discharging electrochemical mechanism. Moreover, the non-faradic mechanism of these nanoneedles delivered better durability and high stability up to 10?000 cycles, and a columbic efficiency of 98%. Therefore, 1D β-TiO _(2) nanoneedles hold potential as an electrode material for highly stable supercapacitive performance with long cycle lifetime.
机译：我们报告了在导电玻璃基板上合成的Brookite（β）TiO _（2）的一维（1D）纳米纳米纳米纳米的高稳定超级性能。在利用热灯丝金属气相沉积（HFMVD）的大面积阵列上合成的1Dβ-TiO _（2）纳米型为约24-26nm宽，长650nm，向下逐渐变细。 X射线照射光谱（XPS）显示了它们的化学性质和化学计量Ti和O组合物。 1Dβ-TiO _（2）纳尼德作为电荷存储的平行单元执行，产生34.1mF g〜（α1）的特定电容。电化学阻抗光谱显示，1D纳米孔的大表面积和布鲁克钛矿结晶性质提供了易于获得Na〜（+）离子，并导致扩散抗性低，在其稳定充电放电电化学机构中发挥关键作用。此外，这些纳米纳尼的非传球机理提供了更好的耐久性和高达10？000个循环的耐用性和高稳定性，牙牙效率为98％。因此，1Dβ-TiO _（2）纳米纳纳合金作为电极材料，具有长循环寿命长稳定的超级电容性能。

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