Boron-Doped Anatase TiO2 as a High-Performance Anode Material for Sodium-Ion Batteries

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• 作者：Baofeng Wang ; Fei Zhao ; Guodong Du ; Spencer Porter ; Yong Liu ; Peng Zhang ; Zhenxiang Cheng ; Hua Kun Liu ; Zhenguo Huang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：June 29, 2016
• 年：2016
• 卷：8
• 期：25
• 页码：16009-16015
• 全文大小：469K
• 年卷期：0
• ISSN：1944-8252

文摘

Pristine and boron-doped anatase TiO₂ were prepared via a facile sol–gel method and the hydrothermal method for application as anode materials in sodium-ion batteries (SIBs). The sol–gel method leads to agglomerated TiO₂, whereas the hydrothermal method is conducive to the formation of highly crystalline and discrete nanoparticles. The structure, morphology, and electrochemical properties were studied. The crystal size of TiO₂ with boron doping is smaller than that of the nondoped crystals, which indicates that the addition of boron can inhibit the crystal growth. The electrochemical measurements demonstrated that the reversible capacity of the B-doped TiO₂ is higher than that for the pristine sample. B-doping also effectively enhances the rate performance. The capacity of the B-doped TiO₂ could reach 150 mAh/g at the high current rate of 2C and the capacity decay is only about 8 mAh/g over 400 cycles. The remarkable performance could be attributed to the lattice expansion resulting from B doping and the shortened Li⁺ diffusion distance due to the nanosize. These results indicate that B-doped TiO₂ can be a good candidate for SIBs.