Abstract In recent years, titanium-based oxides have attracted great attention in the research field of secondary Li-ion batteries. However, they suffer from poor electronic conductivity due to a huge band gap. In this paper, PbLi 2 Ti 6 O 14 is fabricated by a simple one-step solid-state reaction method. To enhance its conductance and Li-storage capability, PbLi 1.95 Na 0.05 Ti 6 O 14 , PbLi 1.95 Mg 0.05 Ti 6 O 14 and PbLi 1.95 Al 0.05 Ti 6 O 14 are fabricated by Na, Mg and Al-ion doping. More impressively, PbLi 1.95 Al 0.05 Ti 6 O 14 presents a superior reversible capability with a reversible charge capacity of 152.8 mAh g −1 after 100 cycles at current density 100 mA g −1 . In addition, it also clearly demonstrates that PbLi 1.95 Al 0.05 Ti 6 O 14 has good structural stability and electrochemical reversibility by in situ XRD observation. Besides, it also presents a high Li-ion diffusion coefficient of 1.978 × 10 –12 cm 2 s −1 . All of these make it possible to become a superior performance anode material for Li-ion batteries.

中文翻译：

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通过钠、镁和铝离子掺杂 PbLi 2 Ti 6 O 14 作为锂离子电池负极材料改善电化学性能

摘要 近年来，钛基氧化物在二次锂离子电池研究领域备受关注。然而，由于巨大的带隙，它们的电子导电性很差。在本文中，PbLi 2 Ti 6 O 14 是通过简单的一步固相反应方法制备的。为了提高其电导率和储锂能力，PbLi 1.95 Na 0.05 Ti 6 O 14 、PbLi 1.95 Mg 0.05 Ti 6 O 14 和PbLi 1.95 Al 0.05 Ti 6 O 14 通过Na、Mg 和Al 离子掺杂制备。更令人印象深刻的是，PbLi 1.95 Al 0.05 Ti 6 O 14 表现出优异的可逆容量，在100 mA g -1 电流密度下循环100次后，可逆充电容量为152.8 mAh g -1 。此外，通过原位XRD观察也清楚地表明PbLi 1.95 Al 0.05 Ti 6 O 14 具有良好的结构稳定性和电化学可逆性。此外，它还具有1.978 × 10 –12 cm 2 s -1 的高锂离子扩散系数。所有这些都使成为锂离子电池性能优越的负极材料成为可能。