Synthesis of Porous Carbon Nanotubes@LiVTiO4 Composites and Their Advanced Electrochemical Properties for Lithium‐Ion Batteries,Energy Technology

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Synthesis of Porous Carbon Nanotubes@LiVTiO4 Composites and Their Advanced Electrochemical Properties for Lithium‐Ion Batteries
Energy Technology ( IF 3.6 ) Pub Date : 2020-01-27 , DOI: 10.1002/ente.201901347
Xingyan Zeng ₁ , Yakun Tang ₁ , Lang Liu ₁ , Yang Gao ₁ , Yang Zhang ₁

Affiliation

Carbon nanotubes (CNTs)@LiVTiO₄ composites are successfully constructed by a series of treatments, including sol–gel method, solid phase grinding, and a subsequent calcination procedure. In the composite, some LiVTiO₄ nanoparticles are adhered on the surface of the bamboo‐like CNTs, whereas others are embedded in the walls of CNTs. As the anode for lithium‐ion batteries, the CNTs@LiVTiO₄ nanocomposite delivers a high specific capacity of 346 mA h g⁻¹ after 500 cycles at 0.2 A g⁻¹. Even at a high current density of 5 A g⁻¹, the electrode still maintains the capacity of 111.1 mA h g⁻¹ after 1000 cycles. The excellent electrochemical performance is attributed to the unique structure of CNTs@LiVTiO₄, which can successfully prevent the pulverization and aggregation of LiVTiO₄ nanoparticles and enhance the electrical conductivity. All these favorable factors make CNTs@LiVTiO₄ a promising anode material for stable, safe, and high‐energy lithium‐ion batteries.

中文翻译：

多孔碳纳米管@ LiVTiO4复合材料的合成及其对锂离子电池的先进电化学性能

碳纳米管（CNTs）@LiVTiO ₄复合材料通过一系列处理成功构建，包括溶胶-凝胶法，固相研磨和后续的煅烧程序。在复合材料中，一些LiVTiO ₄纳米颗粒粘附在竹状CNT的表面上，而另一些则嵌入CNT的壁中。作为锂离子电池的阳极，CNTs @ LiVTiO ₄纳米复合材料在0.2 A g ^-1下循环500次后可提供346 mA h g ^-1的高比容量。即使在5 A g ^-1的高电流密度下，电极仍保持111.1 mA h g ^-1的容量经过1000个周期。优异的电化学性能归因于CNTs @ LiVTiO ₄的独特结构，可以成功地防止LiVTiO ₄纳米颗粒的粉化和聚集并增强导电性。所有这些有利因素使CNTs @ LiVTiO ₄成为稳定，安全和高能锂离子电池的有希望的负极材料。

更新日期：2020-01-27

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