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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Nitrogen-doped carbon coated Li4Ti5O12-TiO2/Sn nanowires and their enhanced electrochemical properties for lithium ion batteries
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Nitrogen-doped carbon coated Li4Ti5O12-TiO2/Sn nanowires and their enhanced electrochemical properties for lithium ion batteries

机译：氮掺杂碳包覆的Li4Ti5O12-TiO2 / Sn纳米线及其对锂离子电池的电化学性能

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摘要

Li-Ti-O system materials have been intensively investigated due to their outstanding rate performance and cycling stability for lithium ion batteries. However, poor electronic conductivity and low theoretical capacity restrict their practical application. In this paper, we fabricated Li4Ti5O12-TiO2/Sn nanowires embedded in a N-doped carbon network via a simple heterostructured growth process. Not only can the novel composites illustrate the synergistic effect of the structural stability of 1D Li4Ti5O12-TiO2 substrates and high capacity of Sn, but the N-doped porous carbon network also can improve the conductive and ion diffusion improvement together with aggregation prevention. Therefore, the novel nanocomposites show an initial discharge capacity of 964 mA h g(-1) and a capacity retention of about 360 mA h g(-1) after 600 cycles at a high current rate of 1000 mA g(-1), which makes them a promising anode material for lithium ion batteries.
机译：Li-Ti-O系统材料因其出色的倍率性能和锂离子电池的循环稳定性而受到了广泛的研究。然而，差的电导率和低理论容量限制了它们的实际应用。在本文中，我们通过简单的异质结构生长工艺制备了嵌入N掺杂碳网络中的Li4Ti5O12-TiO2 / Sn纳米线。新型复合材料不仅可以说明一维Li4Ti5O12-TiO2衬底的结构稳定性和高Sn容量的协同效应，而且N掺杂的多孔碳网络还可以改善导电性和离子扩散，并防止聚集。因此，新型纳米复合材料在1000 mA g（-1）的高电流速率下经过600次循环后显示出964 mA hg（-1）的初始放电容量和约360 mA hg（-1）的容量保持率，这使得它们是锂离子电池的有希望的负极材料。

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