Metal\u2013Organic Framework-Assisted Synthesis of Compact Fe2O3 Nanotubes in Co3O4 Host with Enhanced Lithium Storage Properties

Song Lin Zhang,Hao Bin Wu,Xiong Wen David Lou,Bu Yuan Guan

doi:10.1007/s40820-018-0197-1

Song Lin Zhang, Hao Bin Wu + Show 2 more

Open Access

https://doi.org/10.1007/s40820-018-0197-1

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Abstract

Transition metal oxides are promising candidates for the high-capacity anode material in lithium-ion batteries. The electrochemical performance of transition metal oxides can be improved by constructing suitable composite architectures. Herein, we demonstrate a metal–organic framework (MOF)-assisted strategy for the synthesis of a hierarchical hybrid nanostructure composed of Fe2O3 nanotubes assembled in Co3O4 host. Starting from MOF composite precursors (Fe-based MOF encapsulated in a Co-based host matrix), a complex structure of Co3O4 host and engulfed Fe2O3 nanotubes was prepared by a simple annealing treatment in air. By virtue of their structural and compositional features, these hierarchical composite particles reveal enhanced lithium storage properties when employed as anodes for lithium-ion batteries.

Highlights

Lithium-ion batteries (LIBs) have drawn considerable research attention as a rechargeable power source for portable electronic devices and electric vehicles [1, 2]
Transition metal oxides (TMOs) have been considered as promising electrode materials for LIBs owing to their high specific capacity, low cost, and synthetic versatility to diverse nanostructures [8,9,10,11]
The composition was analyzed by an energy-dispersive X-ray analysis (EDX) equipment attached to the Field-emission scanning electron microscope (FESEM) instrument

Summary

Introduction

Lithium-ion batteries (LIBs) have drawn considerable research attention as a rechargeable power source for portable electronic devices and electric vehicles [1, 2]. We adopted a MOF-assisted approach for the synthesis of hierarchical composite particles of Fe2O3 nanotubes encapsulated in Co3O4 hosts for potential use as an anode material in LIBs. The strategy involves incorporation of MIL-88B (a Fe-based MOF) nanorods in a zeolitic imidazolate framework-67 (ZIF-67, a Co-based MOF) crystal. Benefiting from the unique structure and robust matrix, the as-prepared hierarchical Fe2O3 nanotubes@Co3O4 composite particles exhibit remarkable electrochemical performance when evaluated as an anode material for LIBs. The MIL-88B nanorods were synthesized by following a hydrothermal method reported earlier [38]. The resulting product was washed with ethanol several times It was dispersed with 10 mL of methanol solution containing 0.5 g of polyvinylpyrrolidone (PVP, Mw = 40,000), and the mixture was stirred at room temperature for 12 h. The temperature was maintained for 2 h after which the furnace was naturally cooled to room temperature

Materials Characterization

Electrochemical Measurements

Results and Discussion

Conclusion