期刊
SMALL
卷 14, 期 26, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201800659
关键词
Fe2O3; Mn2O3; heterostructures; lithium-ion battery anodes; nonhierarchical
类别
资金
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- National Natural Science Foundation of China [51521001]
- National Key Research and Development Program of China [2016YFA0202603]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- Yellow Crane Talent (Science and Technology) Program of Wuhan City
- Fundamental Research Funds for the Central Universities [WUT: 2016III001, 2017IVA100, 2017IVA096, 2017III009, 2017III040]
High capacity transition-metal oxides play significant roles as battery anodes benefiting from their tunable redox chemistry, low cost, and environmental friendliness. However, the application of these conversion-type electrodes is hampered by inherent large volume variation and poor kinetics. Here, a binary metal oxide prototype, denoted as nonhierarchical heterostructured Fe2O3/Mn2O3 porous hollow spheres, is proposed through a one-pot self-assembly method. Beyond conventional heteromaterial, Fe2O3/Mn2O3 based on the interface of (104)(Fe2O3) and (222)(Mn2O3) exhibits the nonhierarchical configuration, where nanosized building blocks are integrated into microsized spheres, leading to the enhanced structural stability and boosted reaction kinetics. With this design, the Fe2O3/Mn2O3 anode shows a high reversible capacity of 1075 mA h g(-1) at 0.5 A g(-1), an outstanding rate capability of 638 mA h g(-1) at 8 A g(-1), and an excellent cyclability with a capacity retention of 89.3% after 600 cycles.
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