Hydrothermal synthesis and high electrochemical performance of ordered mesoporous Co/CMK-3 nanocomposites
A novel ordered mesoporous Co/CMK-3 nanocomposites were successfully fabricated via a facile hydrothermal method. XRD patterns affirmed that the CoCl2 entirely reduced to metal Co. Cobalt particles were well-dispersed and embedded in the mesochannels of the CMK-3 according to the nitrogen adsorption-desorption technique and transmission electron microscopy (TEM) images. Electrochemical test shows that cobalt nanoparticle can significantly promote the electrochemical properties of CMK-3 leading to a remarkable enhancement of the reversible capacity, cyclic stability, and rate capacity. The Co/CMK-3 nanocomposites were delivering a high reversible capacity of 674 mAh g−1 at the current density of 50 mA g−1 after 50 cycles, which was much higher than that of original CMK-3 (400 mAh g−1). The Co/CMK-3 nanocomposites also demonstrate an excellent rate capability. The improved lithium storage properties of ordered Co/CMK-3 nanocomposites can be attributed to the CMK-3 that could restrain the aggregation of Co nanoparticles, the large surface area of the mesopores in which the Co nanoparticles are formed, as well as presence of Co which played the role of catalyst could promote the lithium storage reaction.
KeywordsHydrothermal Ordered mesoporous Co/CMK-3 nanocomposites Electrochemical performance Lithium-ion batteries
This work was financially supported by the China Postdoctoral Science Foundation (2017M610296), Cooperative Innovation Fund-Prospective Project of Jiangsu Province (BY2014023-29 and BY2014023-23), National Natural Science Foundation of China (21201083), the Undergraduate Innovation Training Program of Jiangnan University of China Grant (2017218Y), the Open Project Program of Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University (KLET1602), the Fundamental Research Funds for the Central Universities (JUSRP51621A and JUSRP51505), the Priority Academic Program Development of Jiangsu Higher Education Institutions, Hubei Key Laboratory of Low Dimensional Optoelectronic Material and Devices (HLOM142004).
- 37.Zhao W, Du N, Zhang H (2016) A novel co-Li2O@Si core-shell nanowire array composite as a high-performance lithium-ion battery anode material. Nano 8:4511–4519Google Scholar
- 39.Pan GX, Xia XH, Cao F (2015) Construction of co/Co3O4–C ternary core-branch arrays as enhanced anode materials for lithium ion batteries. J Power Sources 293:273–285Google Scholar