Hierarchical Molybdenum Nitride Nanochexes by a Textured Self-Assembly in Gas-Solid Phase for the Enhanced Application in Lithium Ion Batteries
Hierarchical Molybdenum Nitride Nanochexes by a Textured Self-Assembly in Gas-Solid Phase for the Enhanced Application in Lithium Ion Batteries
复制标题
通过气固相织构自组装制备多级氮化钼纳米颗粒，增强其在锂离子电池中的应用
DOI：
10.1021/acsnano.5b02415
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发表时间：
2015
期刊：
影响因子：
17.1
通讯作者：
Wang Yu
中科院分区：
文献类型：
--
作者：
Xu Haitao;Zhang Huijuan;Fang Ling;Yang Jiao;Wu Kai;Wang Yu
自组装作为一种普遍现象，在溶液化学中经常被报道。然而，在气固相中，它很少被公开。MoN nanochex具有独特的几何形状。其体段由织构化的单晶MoN纳米线组成，平行于[1 $> 22 <$$>]方向的边缘由与体段晶向不同的纳米线连接。本文研究了MoN纳米管的结构，并据此提出了一种可能的生长机制。我们希望将这种方法扩展到许多其他功能材料的设计合成，如氮化物，碳化物和硼化物，从而显着定制其所得的性能。同时，作为一种有前途的锂离子电池（LIB）电极材料，钛箔上的MoN nanochex已被应用于电化学储能，并稳定地提供了720 mAh/g的比容量和高达98.5%的显着库仑效率，这意味着实现了来自介孔结构和与导电基底的直接接触的协同效应。
Self-assembly, as one kind of general phenomenon, has often been reported in solution chemistry. However, in gas–solid phase, it seldom has been disclosed. The MoN nanochex exhibits unique geometrical shape. Its body segment is composed of textured single crystal MoN nanowires, while its edges parallel to [1̅22̅] direction are attached by nanowires whose crystal orientation is different from that of the body segment. In this paper, the structure of the MoN nanochex is studied, and accordingly, a possible growth mechanism is proposed. We expect to extend this method to designed synthesis of many other functional materials, such as nitrides, carbides, and borides, and thereby to significantly tailor their resulting properties. Meanwhile, as one promising electrode material for Li-ion batteries (LIBs), MoN nanochex on Ti foil has been applied in the electrochemical energy storage, and stably delivered a specific capacity of 720 mAh/g with a remarkable Coulombic efficiency up to 98.5%, implying an achieved synergic effect derived from both mesoporous structure and the direct contact with the conducting substrate.