Journal
ACS NANO
Volume 11, Issue 4, Pages 4198-4205Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b01152
Keywords
yolk-shell; Fe2O3; octahedron; metal-organic framework; lithium-ion battery
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Funding
- National Natural Science Foundation of China [51271105, 51603119]
- Shanghai Science & Technology Committee [15520720600]
- Innovative Research Team [IRT13078]
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The metal organic-framework (MOF) approach is demonstrated as an effective strategy for the morphology evolution control of MIL-53(Fe) with assistance of microwave irradiation. Owing to the homogeneous nucleation offered by microwave irradiation and confined porosity and skeleton by MOF templates, various porous Fe2O3 nanostructures including spindle, concave octahedron, solid octahedron, yolk shell octahedron, and nanorod with porosity control are derived by simply adjusting the irradiation time. The formation mechanism for the MOF precursors and their derived iron oxides with morphology control is investigated. The main product of the mesoporous yolk shell octahedron-in octahedron Fe2O3 nanostructure is also found to be a promising anode material for lithium-ion batteries due to its excellent Li-storage performance. It can deliver a reversible larger-than-theoretical capacity of 1176 mAh g(-1) after 200 cycles at 100 mA g(-1) and good high-rate performance (744 mAh g(-1) after 500 cycles at 1 A g(-1)).
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