Double‐Carbon Enhanced TiO2 Nanotubes as Highly Improved Anodes for Sodium‐Ion Batteries,ChemistrySelect

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Double‐Carbon Enhanced TiO2 Nanotubes as Highly Improved Anodes for Sodium‐Ion Batteries
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-04-01 , DOI: 10.1002/slct.202000783
Ying Su ₁ , Shu‐Zhi Cao ₁ , Bo Zhao ₁ , Zhen‐Yi Gu ₂ , Xu Yang ₃ , Xing‐Long Wu _{1,

2,

3} , Guang Wang ₁

Affiliation

TiO₂, with low cost, highly environmental benignity, and high safety, has been considered to exhibit great potential as an advanced anode material for sodium ion batteries (SIBs), although slow electron/ion transport hinders its development. Here, we find the composite of thin‐walled TiO₂ nanotubes with a double carbon coating by hydrothermal reaction and calcination, which effectively improves the structural stability and promotes electron transport. The composite material of TiO₂/rGO@NC delivers the first charge specific capacity of 245.8 mA h g⁻¹ at 0.02 A g⁻¹, along with 118.7 and 91.7 mA h g⁻¹ at high current densities of 2.5 and 5 A g⁻¹. Simultaneously, it can still offer 135.8 mA h g⁻¹ over 500 cycles at the current density of 1 A g⁻¹. The remarkable electrochemical performance, combining with its own properties, demonstrates that it can be used as a hopeful anode material for superior performance SIBs.

中文翻译：

双碳增强型TiO2纳米管作为钠离子电池的高度改良阳极

TiO ₂具有低成本，高环境友好性和高安全性的优点，尽管其缓慢的电子/离子传输阻碍了其发展，但它被认为具有作为钠离子电池（SIB）先进阳极材料的巨大潜力。在这里，我们发现了通过水热反应和煅烧形成的具有双碳涂层的薄壁TiO ₂纳米管复合材料，可以有效地改善结构稳定性并促进电子传输。TiO ₂ / rGO @ NC的复合材料在0.02 A g ^-1时可提供245.8 mA h g ^-1的第一电荷比容量，在2.5和5 A g ^-1的高电流密度下可提供118.7和91.7 mA h g ^-1的电荷。。同时，它还能提供135.8毫安ħ克^-1以1A克的电流密度超过500次循环^-1。出色的电化学性能，再加上其自身的性能，证明它可以用作具有优异性能的SIB的理想阳极材料。

更新日期：2020-04-01

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