Metallic phase molybdenum disulfide (MoS₂) is well known for orders of magnitude higher conductivity than 2H semiconducting phase MoS₂. Herein, for the first time, the authors design and fabricate a novel porous nanotube assembled with vertically aligned metallic MoS₂ nanosheets by using the scalable solvothermal method. This metallic nanotube has the following advantages: (i) intrinsic high electrical conductivity that promotes the rate performance of battery and eliminates the using of conductive additive; (ii) hierarchical, hollow, porous, and aligned structure that assists the electrolyte transportation and diffusion; (iii) tubular structure that avoids restacking of 2D nanosheets, and therefore maintains the electrochemistry cycling stability; and (iv) a shortened ion diffusion path, that improves the rate performance. This 1D metallic MoS₂ nanotube is demonstrated to be a promising anode material for lithium‐ion batteries. The unique structure delivers an excellent reversible capacity of 1100 mA h g⁻¹ under a current density of 5 A g⁻¹ after 350 cycles, and an outstanding rate performance of 589 mA h g⁻¹ at a current density of 20 A g⁻¹. Furthermore, attributed to the material's metallic properties, the electrode comprising 100% pure material without any additive provides an ideal system for the fundamental electrochemical study of metallic MoS₂. This study first reveals the characteristic anodic peak at 1.5 V in cyclic voltammetry of metallic MoS_2. This research sheds light on the fabrication of metallic 1D, 2D, or even 3D structures with 2D nanosheets as building blocks for various applications.

中文翻译：

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离子传输纳米管与垂直排列的金属MoS2组装在一起，可用于高速率锂离子电池

金属相二硫化钼（MoS ₂）的导电率比2H半导体相MoS ₂高几个数量级。本文中，作者首次设计并制造了一种新型的垂直排列的金属MoS ₂组装的多孔纳米管。纳米片通过使用可扩展的溶剂热方法。这种金属纳米管具有以下优点：（i）固有的高电导率，可提高电池的倍率性能并消除导电添加剂的使用；（ii）有助于电解质运输和扩散的分层，中空，多孔和排列的结构；（iii）避免2D纳米片重新堆叠并因此保持电化学循环稳定性的管状结构；（iv）缩短了离子扩散路径，从而改善了速率性能。这种一维金属MoS ₂纳米管被证明是锂离子电池的有希望的负极材料。独特的结构在5 A g的电流密度下可提供1100 mA hg ^-1的出色可逆容量^-1 350次循环，和589毫安汞柱的杰出率性能之后^-1在20甲g的电流密度^-1。此外，归因于材料的金属特性，包含100％纯材料而没有任何添加剂的电极为金属MoS ₂的基础电化学研究提供了理想的系统。这项研究首先揭示了金属MoS _2的循环伏安法中1.5 V处的特征性阳极峰_。这项研究为以1D，2D或什至3D结构（以2D纳米片作为构建块用于各种应用）的制造提供了启示。