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A facile route to prepare mixed transition metal oxide yolk-shell microspheres for enhanced lithium storage
Yuanxiang Gu1, Yuxue Xuan1, Heng Zhang2
1College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China. gyx0524@126.com.
Abstract:
A coordination co-precipitation route followed by a calcination process was developed to prepare mixed transition metal oxide microspheres with a yolk-shell structure. ZnCo2O4, NiCo2O4, MnCo2O4, ZnMn2O4 and CoMn2O4 have been successfully fabricated, which demonstrates the universality of this route. As a promising anode for lithium-ion batteries (LIBs), ZnCo2O4 was investigated as a typical example, which showed a remarkable reversible capacity of 1063 mA h g-1 after 50 cycles at a current density of 200 mA g-1 and a good rate capability of 839 mA h g-1 after 200 cycles at a large current density of 900 mA g-1. This work shows the extensive potential of a general route for the synthesis of yolk-shell microspheres for next-generation energy conversion and storage devices.
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