Mo-Doped TiNb2O7 Microspheres as Improved Anode Materials for Lithium-Ion Batteries,ChemElectroChem

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Mo-Doped TiNb2O7 Microspheres as Improved Anode Materials for Lithium-Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2021-08-21 , DOI: 10.1002/celc.202101056
Chanrong Lei ₁ , Xue Qin ₂ , Shengyang Huang ₁ , Tianyu Wei ₁ , Yuzhe Zhang ₁

Affiliation

TiNb₂O₇ (TNO) is a promising anode material for lithium-ion batteries because of its high capacity and long cyclic life. Nevertheless, its practical application is limited by sluggish ionic and electronic conductivity. Alien ion doping is one of the most simple and effective methods to optimize the electrochemical performance of anode materials. Herein, H₂MoO₄ derived Mo-doped TiNb₂O₇ (Mo-TNO) microspheres have been synthesized via a solvothermal method followed by calcining process. The resulting Mo-TNO displays an excellent rate capacity (about 200 mAh g⁻¹ at 10 C) and a high capacity retention (80 % after 500 cycles at ∼2.6 C compared with the second cycle). In addition, the H₂MoO₄-derived Mo-TNO still keeps the microsphere shape after 500 cycles at 10 C. These superior properties demonstrate that Mo-TNO has great application advantages as anode material for lithium-ion batteries.

中文翻译：

掺杂钼的 TiNb2O7 微球作为改进的锂离子电池负极材料

TiNb ₂ O ₇ (TNO)因其高容量和长循环寿命而成为一种很有前途的锂离子电池负极材料。然而，其实际应用受到缓慢的离子和电子导电性的限制。外源离子掺杂是优化负极材料电化学性能最简单有效的方法之一。在此，H ₂ MoO ₄衍生的Mo掺杂TiNb ₂ O ₇ (Mo-TNO)微球已经通过溶剂热法随后煅烧过程合成。所得的 Mo-TNO 显示出优异的倍率容量（约 200 mAh g ^-1在 10 C) 和高容量保持率（与第二次循环相比，在 ~2.6 C 下 500 次循环后为 80%）。此外，H ₂ MoO ₄衍生的Mo-TNO在10 C下循环500次后仍保持微球形状。这些优异的性能表明Mo-TNO作为锂离子电池负极材料具有很大的应用优势。

更新日期：2021-09-03

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