Abstract
Metal-organic framework (MOF)-derived yolk-shell structures are one of the most potential nanoarchitectures applied in second batteries and electrocatalysis. In this manuscript, a multilayer yolk-shell structured CoSe 2 has been fabricated via post carbonization and selenization processes of step-by-step crystal epitaxial growth of multilayer solid zeolitic imidazolate frameworks (ZIFs) precursor. When used as the anode of a sodium-ion half battery, the obtained multilayer yolk-shell structured CoSe 2 materials can maintain a discharge capacity of 352.9 mAh g −1 after the 2000 cycles at the current density of 1 A g −1 , which can be attributed to the special multilayer yolk-shell structure by providing the fast sodium ion transport. Besides, it also delivers excellent electrochemical performance in the sodium-ion full batteries, which further demonstrate the outstanding electrochemical property of the obtained multilayer yolk-shell structured CoSe 2 electrode material. • The multilayered yolk-shell CoSe 2 nano-dodecahedrons was successfully prepared. • The multilayered CoSe 2 with hollow structure effectively buffer volume expansion. • The multilayered yolk-shell CoSe 2 shows excellent long-term cycle stability in SIB. • The Na-ion full cell exhibits excellent rate capacity and cycle performance.
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