Nano SnO2 in Flexible Carbon Spaces Protected by Rigid TiO2 for Efficient Reversible Lithium Storage,ChemistrySelect

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Nano SnO2 in Flexible Carbon Spaces Protected by Rigid TiO2 for Efficient Reversible Lithium Storage
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-11-29 , DOI: 10.1002/slct.201802360
Yulin Zhou ₁ , Jianfei Lei _{1,

2} , Xiujuan Jin ₁ , Jing Ni ₁ , Shaofeng Zhang ₁ , Kai Du ₁ , Zhaowu Wang _{1,

3}

Affiliation

We report a spatially‐confined strategy to improve the cycling stability of tin‐based anode materials, in which carbon acted as passenger particle is implanted in suit into the secondary structure of porous tin dioxide (SnO₂), forming a spatial fault structure together with the SnO₂ particles. Herein, the carbon (C) surrounding is endowed with the dual roles, which can not only prevent SnO₂ and tin (Sn) nanoparticles aggregating for a better cycling stability, but also can improve the electron transport at the particle interface for high rate performance of the battery. Also, rigid titanium dioxide (TiO₂) cavities are constructed for positive mechanical protections and releasing the mechanical stress to further improve the stability of the battery. Electrochemical tests reveal that such spatially‐confined architectures can enhance the cycling stability and improve the rate properties of tin‐based anode batteries remarkably. The discharge specific capacity of the spatial confined samples can be maintained 520 mAh g^‐1 after 100 cycles at 0.2C and 320 mAh g^‐1 at a high current rate of 1C.

中文翻译：

刚性TiO2保护的柔性碳空间中的纳米SnO2用于高效可逆锂存储

我们报告了一种空间受限的策略，以改善锡基负极材料的循环稳定性，其中，将作为载流子颗粒的碳适当地注入到多孔二氧化锡（SnO ₂）的二级结构中，并与之形成空间断层结构。 SnO ₂颗粒。在此，碳（C）具有双重作用，不仅可以防止SnO ₂和锡（Sn）纳米粒子聚集以获得更好的循环稳定性，还可以改善粒子界面处的电子传输，从而获得较高的性能。电池。另外，硬质二氧化钛（TiO ₂）腔体可提供积极的机械保护并释放机械应力，从而进一步提高电池的稳定性。电化学测试表明，这种空间受限的体系结构可以提高循环稳定性，并显着改善锡基阳极电池的倍率性能。在0.2C下经过100次循环后，可以在1C的高电流速率下将空间受限样品的放电比容量保持在520 mAh g ^-1和320 mAh g ^-1。

更新日期：2018-11-29

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