Key Laboratory of Inorganic Chemistry in Universities of Shandong, Department of Chemistry and Chemical Engineering , Jining University , Qufu , Shandong 273155 , China.
Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry , University of Science and Technology Beijing , Beijing 100083 , China.
ACS Appl Mater Interfaces. 2018 May 16;10(19):16660-16665. doi: 10.1021/acsami.8b04009. Epub 2018 May 4.
Two new polyoxometalate (POM)-based three-dimensional metal organic carbene frameworks, [Ag(trz)(HO)][HPWO] (POMs@MCNCs-1) and [Ag(trz)(HO)][HSiWO] (POMs@MCNCs-2), were hydrothermally synthesized, in which Keggin-type polyoxoanions as templates induce the formation of two different kinds of metal-carbene nanocages (MCNCs) for the first time. Combination of the reversible multielectron redox behavior and electron storage functions of POMs with the good electrical conductivity of the single-walled carbon nanotubes (SWNTs) renders the POMs@MCNCs-1/SWNT composite excellent electrochemical performance and good stability as anode materials of lithium-ion batteries, with up to 2000 mA h g for the first discharge capacity and ca. 859 mA h g for the second cycle at a current density of 100 mA g. The successful fabrication of unprecedented MCNCs into the POM-based three-dimensional metal-organic frameworks in the present work must initiate extensive research interests in diverse fields.
两种新型的基于多金属氧酸盐（POM）的三维金属有机卡宾框架，[Ag(trz)(HO)][HPWO]（POMs@MCNCs-1）和[Ag(trz)(HO)][HSiWO]（POMs@MCNCs-2），是通过水热合成得到的，其中 Keggin 型多氧阴离子作为模板首次诱导形成了两种不同类型的金属-卡宾纳米笼（MCNCs）。POMs 的可逆多电子氧化还原行为和电子存储功能与单壁碳纳米管（SWNTs）的良好导电性相结合，使得 POMs@MCNCs-1/SWNT 复合材料作为锂离子电池的阳极材料具有优异的电化学性能和良好的稳定性，在 100 mA g 的电流密度下，首次放电容量高达 2000 mA h g，第二次循环容量约为 859 mA h g。本工作中成功地将前所未有的 MCNCs 构建到基于 POM 的三维金属-有机骨架中，必将引发各个领域的广泛研究兴趣。
