期刊
CHEMICAL ENGINEERING JOURNAL
卷 427, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.131697
关键词
Bimetal oxide; Various nanostructures; Kirkendall effect; Hierarchical sub-micropolyhedrons; Lithium-ion battery
资金
- National Natural Science Foundation of China [21875091]
- Shanghai Municipal Education Commission [QD2019008]
By briefly adjusting the calcination temperature of the precursor, yolk-shell, hollow, and hierarchical Fe0.8Mn1.2O3 sub-micropolyhedrons are produced, showing superior lithium-ion storage performance.
Designing nanostructured metal oxides (MOs) is a particularly effective approach to enhance their lithium storage properties. However, it is difficult to synthesize MOs with various nanostructures by a facile strategy. Herein, based on the Kirkendall effect, the yolk-shell, hollow, and hierarchical Fe0.8Mn1.2O3 sub-micropolyhedrons are produced by briefly adjusting the calcination temperature of the precursor. Moreover, hollow and hierarchical Fe0.8Mn1.2O3 sub-microcubes can also be synthesized by further aging the precursor and then using the same strategy. Furthermore, the formation mechanism for the above-mentioned nanostructures is carefully studied. Among all prepared Fe0.8Mn1.2O3 nanostructures, the hierarchical sub-micropolyhedrons exhibit the best lithium-ion storage performance. It can deliver an excellent discharge capacity of 1114.3 mAh g(-1) after 100 cycles at 200 mA g(-1) and superior rate properties (1268.8, 864.1, 698.9, 556.3, and 397.6 mAh at 0.2, 1, 2, 4, and 8 A g(-1), respectively).
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