Facile preparation of hierarchically porous carbons from metal-organic gels and their application in energy storage.
Facile preparation of hierarchically porous carbons from metal-organic gels and their application in energy storage.
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金属有机凝胶简易制备分级多孔碳及其在储能中的应用
DOI：
10.1038/srep01935
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发表时间：
2013
影响因子：
4.6
通讯作者：
Zou, Ruqiang
中科院分区：
文献类型：
--
作者：
Xia, Wei;Qiu, Bin;Xia, Dingguo;Zou, Ruqiang
多孔碳材料由于其热稳定性和化学稳定性、高表面积和低密度而具有许多应用。然而，传统的通过沸石或二氧化硅模板浇铸来制备多孔碳的方法因成本高和/或有毒而受到批评。创建三维（3D）碳产品是另一个挑战。本文报道了一种以金属有机凝胶（MOG）为模板制备多孔炭的简便方法。我们惊奇地发现，碳产物继承了MOF的高度多孔性质，并且联合收割机与凝胶的整合特性结合，这导致具有更大表面积和相当大孔体积的分级多孔结构。它们作为锂硫电池的正极材料，表现出相当高的吸氢率和优异的电化学性能。本工作为多孔碳材料的快速、清洁合成提供了一种通用方法，为金属有机凝胶在储能领域的应用开辟了新的途径。
Porous carbon materials have numerous applications due to their thermal and chemical stability, high surface area and low densities. However, conventional preparing porous carbon through zeolite or silica templates casting has been criticized by the costly and/or toxic procedure. Creating three-dimensional (3D) carbon products is another challenge. Here, we report a facile way to prepare porous carbons from metal-organic gel (MOG) template, an extended metal-organic framework (MOF) structure. We surprisingly found that the carbon products inherit the highly porous nature of MOF and combine with gel's integrated character, which results in hierarchical porous architectures with ultrahigh surface areas and quite large pore volumes. They exhibit considerable hydrogen uptake and excellent electrochemical performance as cathode material for lithium-sulfur battery. This work provides a general method to fast and clean synthesis of porous carbon materials and opens new avenues for the application of metal-organic gel in energy storage.
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