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首页> 外文期刊>Advanced energy materials >3D, Mutually Embedded MOF@Carbon Nanotube Hybrid Networks for High-Performance Lithium-Sulfur Batteries
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3D, Mutually Embedded MOF@Carbon Nanotube Hybrid Networks for High-Performance Lithium-Sulfur Batteries

机译：用于高性能锂硫电池的3D，相互嵌入的MOF @ Carbon Nanotube混合网络

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摘要

Metal-organic frameworks (MOFs) hybridized with a conductive matrix could potentially serve as a sulfur host for lithium-sulfur (Li-S) battery electrodes; so far most of the previously studied hybrid structures are in the powder form or thin compact films. This study reports 3D porous MOF@carbon nanotube (CNT) networks by grafting MOFs with tailored particle size uniformly throughout a CNT sponge skeleton. Growing larger-size MOF particles to entrap the conductive CNT network yields a mutually embedded structure with high stability, and after sulfur encapsulation, it shows an initial discharge capacity of approximate to 1380 mA h g(-1) (at 0.1 C) and excellent cycling stability with a very low fading rate. Furthermore, owing to the 3D porous network that is suitable for enhanced sulfur loading, a remarkable areal capacity of approximate to 11 mA h cm(-2) (at 0.1 C) is obtained, which is much higher than other MOF-based hybrid electrodes. The mutually embedded MOF@CNTs with simultaneously high specific capacity, areal capacity, and cycling stability represent an advanced candidate for developing high-performance Li-S batteries and other energy storage systems.
机译：与导电基质混合的金属有机骨架（MOF）可能会充当锂硫（Li-S）电池电极的硫主体。迄今为止，大多数先前研究的混合结构都是粉末形式或致密薄膜。这项研究报告了通过将具有定制粒径的MOF均匀地接枝到整个CNT海绵骨架上来报告3D多孔MOF @碳纳米管（CNT）网络。生长较大尺寸的MOF颗粒以捕获导电CNT网络时，会形成相互嵌入的结构，具有很高的稳定性，并且在硫包封后，其初始放电容量约为1380 mA hg（-1）（在0.1 C下），并且循环性能出色稳定性极低的衰落率。此外，由于适用于增强硫负荷的3D多孔网络，获得了约11 mA h cm（-2）（在0.1 C时）的显着面积容量，这比其他基于MOF的混合电极要高得多。同时具有高比容量，面积容量和循环稳定性的相互嵌入的MOF @ CNT代表了开发高性能Li-S电池和其他储能系统的先进选择。

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