Metal-Organic Framework-derived Materials and Their Applications in EnergyStorage Devices and Electrocatalysis
YE Shaofeng, LIU Wenxian, XU Xilian, SHA Dongyong, SHI Wenhui, CAO Xiehong
2018, 32 (13):
Metal-organic frameworks (MOFs), a kind of porous materials constructed from metal ion/cluster and organic li-gands, have been a major focus of materials science over the past decades. MOFs possess high specific surface area and uniform cavities, as well as structural tunability, which are promising for a variety of applications. However, the poor conductivity and low stability of MOFs restrict their further development of applications. In recent years, MOF-derived materials, obtained by hydrothermal and/or calcining process, which possess relatively higher conductivity and better stability while maintaining the structural advantages of MOFs, have become a research hotspot. However, the single composition and structure of MOF-derived materials, which can provide limited performance (such as capacitive properties, catalytic properties), greatly limit the development of its related applications. Therefore, in addition to research and preparation of a variety of different MOF-derived materials in recent years, researchers mainly foucs on the composition and structure of MOF-derived materials to prepare a variety of materials with excellent performance in various applications (such as energy storage and conversion, catalysis). As applied materials with excellent performance, composition and structure of MOF-derived materials have been studied maturely, mainly include porous carbon, metal oxides, metal phosphides, metal hydroxides, and fibrous structures, hollow structures, core-shell structures, etc. MOF-derived materials with large specific surface area, uniformly distributed cavities, always combine the porous carbon with high conductivity and other derived materials (metal compounds or doped metal atoms and heteroatoms such as N, P, S, etc.) with excellent performance (such as capacitance, catalytic properties), to play a rather excellent performance. Among them, MOF-derived metal compounds have porous structure, which can provide excellent capacity and catalytic properties, and the properties are usually superior to the same materials prepared by other methods. In terms of structure, in recent years, the resear-chers have prepared a variety of MOF-derived materials with different structures by controlling the precursor structure or the reaction conditions. On the one hand, partially prepared structures (such as the core shell structure and the hollow structure) of MOF-derived materials can alleviate the impact in the process of use, thus it can show excellent cycling performance. On the other hand, by regulating the structure of MOF-derived materials, the active sites are fully exposed, so that their performance can be maximized. In this review,we summarizes the recent progress of MOF-derived materials, including its composition, structural regulation, as well as their applications in energy storage, catalysis and other fields. Finally, the future direction and challenge of MOF-derived materials are discussed.
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