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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >High rate capacity nanocomposite lanthanum oxide coated lithium zinc titanate anode for rechargeable lithium-ion battery
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High rate capacity nanocomposite lanthanum oxide coated lithium zinc titanate anode for rechargeable lithium-ion battery

机译：高倍率容量纳米复合氧化镧涂覆的钛酸锂锌阳极，用于可充电锂离子电池

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摘要

Lithium zinc titanate (Li2ZnTi3O8) is an important titanium material of promising candidates for anode materials with superior electrochemical performance and thus has attracted extensive attention. Herein, high capacity, stable Li2ZnTi3O8/La2O3 nanocomposite for lithium-ion battery anode is prepared by a facile strategy. Compared to unmodified Li2ZnTi3O8, the Li2ZnTi3O8/La2O3 electrode display a high specific capacity of 188.6 mAh g(-1) and remain as high as 147.7 mAh g(-1) after 100 cycles at 2.0 A g(-1). Moreover, a reversible capacity of 763 mAh g(-1) can be obtained after 1000 cycles at 2.0 A g(-1) and the retention is 42.7% for Li2ZnTi3O8/La2O3, which is much higher than un-coated Li2ZnTi3O8. The superior lithium storage performances of the Li2ZnTi3O8/La2O3 can be ascribed to the stable layer of protection, small particle size and large surface area. Cyclic voltammograms result reveals that the La2O3 coating layer reduces the polarization and improves the electrochemical activity of anode. (c) 2016 Elsevier B.V. All rights reserved.
机译：钛酸锂锌（Li 2 Zn Ti 3 O 8）是重要的钛材料，具有优异的电化学性能，有望成为阳极材料的有前途的候选者，因此引起了广泛的关注。在此，通过简便的策略制备了用于锂离子电池阳极的高容量，稳定的Li2ZnTi3O8 / La2O3纳米复合材料。与未改性的Li2ZnTi3O8相比，Li2ZnTi3O8 / La2O3电极显示出188.6 mAh g（-1）的高比容量，并在2.0 A g（-1）的100次循环后保持高达147.7 mAh g（-1）。此外，在2.0 A g（-1）下经过1000次循环后，可获得763 mAh g（-1）的可逆容量，并且Li2ZnTi3O8 / La2O3的保留率为42.7％，远高于未涂覆的Li2ZnTi3O8。 Li2ZnTi3O8 / La2O3优异的锂存储性能可以归因于稳定的保护层，小粒径和大表面积。循环伏安图结果表明，La 2 O 3涂层降低了极化并提高了阳极的电化学活性。 （c）2016 Elsevier B.V.保留所有权利。

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