The Synergetic Effect of Inorganic and Organic Compounds Hydrolyzed by Tetrabutyl Titanate on Improving Dispersion and Electrochemical Performance of Li4Ti5O12 Anode Material,ChemistrySelect

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The Synergetic Effect of Inorganic and Organic Compounds Hydrolyzed by Tetrabutyl Titanate on Improving Dispersion and Electrochemical Performance of Li4Ti5O12 Anode Material
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-08-13 , DOI: 10.1002/slct.202002217
Yanhua Zhang ₁ , Weifeng Fan ₂ , Xuan Li ₁ , Yingjun Qiao ₁ , Yuxin Hu ₁ , Wanpeng Li ₂ , Meizhen Qu ₃ , Gongchang Peng ₃ , Zhengwei Xie ₃

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Spinel Li₄Ti₅O₁₂ (LTO) with small particle size has the problem of easy agglomeration, which seriously worsens electrochemical performance but hasn't been yet attracted enough attention. This is one of the biggest challenges in the practical application of LTO. Herein, LTO is modified with tetrabutyl titanate (TBT) to generate inorganic‐organic wrapped LTO anode under simple hydrolysis process. The X‐ray diffraction, fourier transformation infrared spectrum, scanning electron microscopy, transmission electron microscopy and X‐ray photoelectron spectroscopy results show the existence of modifying layer, which not only could promote dispersion, but also improve the electrochemical performance. The LTO modified with 0.5 wt.% TBT displays good dispersion with homogeneous particle size distribution and stable viscosity. Moreover, it exhibits excellent cycling properties over 200 cycles at 5 C (153.4 mAh g⁻¹). These results are assigned to the synergetic effect of the inorganic and organic modifying layer, which could be beneficial to the dispersion and electrochemical performance.

中文翻译：

钛酸四丁酯水解无机和有机化合物的协同作用对改善Li4Ti5O12阳极材料的分散性和电化学性能的影响

尖晶石Li ₄ Ti ₅ O ₁₂粒径小的（LTO）存在易团聚的问题，这严重恶化了电化学性能，但尚未引起足够的重视。这是LTO实际应用中的最大挑战之一。在这里，LTO用钛酸四丁酯（TBT）改性，可以在简单的水解过程中生成无机-有机包裹的LTO阳极。X射线衍射，傅立叶变换红外光谱，扫描电子显微镜，透射电子显微镜和X射线光电子光谱结果表明存在改性层，不仅可以促进分散，而且可以改善电化学性能。用0.5 wt。％TBT改性的LTO显示出良好的分散性，具有均匀的粒度分布和稳定的粘度。此外，^-1）。这些结果归因于无机和有机改性层的协同作用，这可能有益于分散和电化学性能。

更新日期：2020-08-14

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