首页|Double-shelled hybrid MgFe2O4/Fe2O3 hollow microspheres as a high-capacity anode for lithium-ion batteries
Double-shelled hybrid MgFe2O4/Fe2O3 hollow microspheres as a high-capacity anode for lithium-ion batteries
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NSTL
Elsevier
? 2022 The Korean Society of Industrial and Engineering ChemistryTernary metal oxides Fe2O3 and MgFe2O4 have attracted considerable attention as lithium anode materials owing to their high theoretical capacities, environmental friendliness, and low cost; however, their rapid capacity decay and large volume expansion inhibit their lithium storage performance. Herein, we synthesize hybrid MgFe2O4/Fe2O3 hollow microspheres (MFO/FO-HS) hydrothermally, via the polyol reaction of ethylene glycol, followed by calcination at different temperatures. The surface morphology was tuned by adjusting the calcination temperature, assisted by inward and outward Ostwald ripening. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis were performed to investigate the physio-chemical properties of the prepared samples. The sample calcined at 450 °C exhibited an excellent electrochemical performance and retained a reversible capacity of 1390 mAh g?1 after 160 cycles, indicating the significant role of calcination temperature in tuning the structural and electrochemical properties of anode materials. The double-shelled hollow microspheres inhibit rapid capacity decay and prevent severe volume expansion during the electrochemical process. This work opens new paths toward constructing an electrode material with a high electrochemical performance.
NSTL
Elsevier
