Carbon-Encapsulated Metal Oxide Hollow Nanoparticles and Metal Oxide Hollow Nanoparticles: A General Synthesis Strategy and Its Application to Lithium-Ion Batteries
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Abstract
A novel and general strategy for the synthesis of carbon-encapsulated metal oxide hollow nanoparticles (HNPs) and pure metal oxide HNPs was developed from carbon-encapsulated metal nanoparticles by controlled oxidation in the air. The materials were characterized by transmission electron microscopy, scanning electron microscopy, and X-ray diffraction measurements. It was found that the morphologies and compositions of HNPs were easily tailored through adjustment of the oxidation conditions. When used as the anode materials for lithium-ion batteries, carbon-encapsulated α-Fe2O3 HNPs exhibit excellent cycling performance and a higher reversible capacity of about 700 mA h g−1 after the 60th cycle and possess great potential application in lithium-ion batteries.
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