CoO/CuO hybrid hollow microspheres have been successfully prepared via thermal decomposition of CoCu glycolates, whose size can be adjusted by varying the molar ratio of Co/Cu. As lithium-ion battery (LIB) anode, CoO/CuO microspheres exhibited excellent electrochemical performance due to synergistic effects and the hollow structural design, the best CoO/CuO sample could maintain a high specific capacity of 1170.4 mAh g after 300 cycles at 1 A g, and still retain a capacity of 514.5 mAh g after 1000 cycles at 2 A g. Thus obtained CoO/CuO hybrid hollow microspheres hold great potential as anode materials for high-performance LIBs.
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Designed synthesis of MO (M = Zn, Fe, Sn, Ni, Mn, Co, Ce, Mg, Ag), Pt, and Au nanoparticles supported on hierarchical CuO hollow structures.
Nanoscale
December 2016
Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585 Singapore, Singapore.
Despite intensive research into support substrates for the dispersal of nanoparticles and their applications, there has been a lack of general methods to produce metal oxide hollow substrates supporting a wide range of metal and metal oxides. Herein, a synthetic protocol for the preparation of CuO hollow structure-supported MO (M = Zn, Fe, Ni, Sn, Mn, Co, Ce, Mg, and Ag) and noble metals (Pt and Au) with the desired properties and shell structure, such as CuO/FeO, CuO/ZnO, CuO/SnO, CuO/MgO, CuO/NiO, CuO/MnO, CuO/CoO, CuO/CeO, CuO/AgO, CuO/Pt, CuO/Au hollow cubes, CuO/ZnO double-shell hollow cubes, CuO/SnO double-shell hollow octahedra, CuO/SnO/FeO and CuO/MnO/NiO double-shell hollow cubes, was developed based on controlled calcination and etching. These hybrid hollow structures were employed not only as support substrates but also as active constituents for catalytic reactions.
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