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• W4308156795 endingPage "140045" @default.
• W4308156795 startingPage "140045" @default.
• W4308156795 abstract "NiFe 2 V 2 O 8 @NC nanostructures with hierarchically porous yolk-double shell spherical architectures are elaborately fabricated via a facile template-free protocol. Benefited from the expanded ion-transport channels, as well as the activation of synergetic cation-oxygen redox, the electrode manifests excellent rate capability and cycling stability. • NiFe 2 V 2 O 8 @NC nanospheres with hierarchically yolk-double shell are fabricated. • The porous yolk-double shell can accommodate sufficient volume change. • Synergetic cation and oxygen redox is realized by active vanadium redox couples. • NiFe 2 V 2 O 8 @NC harvest a high reversible capacity of 1347.6 mA h g –1 over 200 cycles. • LiCoO 2 // NiFe 2 V 2 O 8 @NC lithium ion full-cells are assembled and evaluated. Polymetallic oxide nanostructures with intricate architectures have become the promising subject of much recent investigations into high-efficiency electrode materials for lithium-ion batteries (LIBs). However, their smooth implementation is still plagued by the fabrication of multi-component structures as well as the delivered inadequate specific capacities. Here, complex NiFe 2 V 2 O 8 @N-doped carbon nanostructures with hierarchically porous yolk-double shell spherical architectures via a facile template-free approach are developed and evaluated as the high-efficiency anode materials for LIBs. Benefited from the yolk-double shell constructions, impressively, the electrode harvests a high reversible capacity of 1347.6 mA h g –1 over 200 cycles without visible deterioration at 0.2 A g –1 , a robust rate capability (726.1 mA h g –1 at 5 A g –1 ), and a desirable cycle stability (75.6% capacity retention over 300 cycles at 1 A g –1 ). Such excellent electrochemical Li-ion storage capability is believed to result from the fast ion-diffusion kinetics enabled by the synergetic cation and oxygen redox because of the introduction of vanadium redox couples, which can be further boosted by capacitive-dominated surface electrochemical reaction. This work provides enlightening insights into the elaborate design and fabrication of complex porous yolk-shell-like nanostructures with intricate compositions for high-efficiency lithium storage." @default.
• W4308156795 created "2022-11-08" @default.
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• W4308156795 date "2023-02-01" @default.
• W4308156795 modified "2023-10-02" @default.
• W4308156795 title "NiFe2V2O8@N-Doped carbon Yolk-Double shell spheres for efficient lithium storage" @default.
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• W4308156795 doi "https://doi.org/10.1016/j.cej.2022.140045" @default.
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