Yang Xing-Lin, Ye Yu-Sheng, Wang Zhi-Meng, Zhang Zao-Hong, Zhao Yi-Lie, Yang Fan, Zhu Zong-Yuan, Wei Tao
School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
Institute of Mechanics and Energy, Ogarev Mordovia State University, Saransk 430000, Russia.
ACS Omega. 2020 Oct 1;5(40):26230-26236. doi: 10.1021/acsomega.0c03929. eCollection 2020 Oct 13.
Polyoxometalate (POM)-based metal-organic framework (MOF)-derived CoO/CoMoO nanohybrids were successfully fabricated by a facile solvothermal method combined with a calcination process, in which a Co-based MOF, that is, ZIF-67 acts as a template while a Keggin-type POM (HPMoO) serves as a compositional modulator. The materials were characterized through scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS) mapping, and electrochemical measurements. When the CoO/CoMoO nanohybrids were applied as anode materials for lithium-ion batteries (LIBs), they display large lithium storage capacity (around 900 mAh g at 0.1 A g) and high cycling stability, and they can also exhibit good rate performances. This work might shed some light on the POM-based MOF host-guest synthesis strategy for the preparation of polymetallic oxides for enhanced electrochemical energy storage and further applications.
通过简便的溶剂热法结合煅烧工艺，成功制备了基于多金属氧酸盐（POM）的金属有机框架（MOF）衍生的CoO/CoMoO纳米杂化物，其中Co基金属有机框架ZIF-67作为模板，而Keggin型POM（HPMoO）作为组成调节剂。通过扫描电子显微镜（SEM）、X射线衍射（XRD）、透射电子显微镜（TEM）、能量色散光谱（EDS）映射和电化学测量对材料进行了表征。当CoO/CoMoO纳米杂化物用作锂离子电池（LIB）的负极材料时，它们表现出较大的锂存储容量（在0.1 A g下约为900 mAh g）和高循环稳定性，并且还可以表现出良好的倍率性能。这项工作可能为基于POM的MOF主客体合成策略提供一些启示，用于制备用于增强电化学能量存储和进一步应用的多金属氧化物。
