Quick one-pot synthesis of amorphous carbon-coated cobalt-ferrite twin elliptical frustums for enhanced lithium storage capability

This source preferred by Amor Abdelkader

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Authors: Xiang, Y., Abdelkader, A. et al.

Journal: Journal of Materials Chemistry A

Volume: 5

Issue: 17

Pages: 8062-8069

eISSN: 2050-7496

ISSN: 2050-7488

DOI: 10.1039/c7ta02136d

© 2017 The Royal Society of Chemistry. Hybrid carbon-coated transition metal oxides (TMOs@C) offer enhanced lithium storage capabilities, but the facile formation of TMOs@C nanocomposites remains a great chal lenge. Herein, we report a novel hierarchical hybrid nanostructure of carbon-coated CoFe 2 O 4 twin elliptical frustums (CoFe 2 O 4 @C TEFs) via a quick one-pot refluxing reaction in ethylene glycol (EG) followed by an annealing treatment. When evaluated as an anode in lithium-ion batteries (LIBs), the resultant CoFe 2 O 4 @C TEF hybrids demonstrate good electrochemical performance with high reversible specific capacity, excellent rate capability and super-long life cycle. After 600 cycles at a current density of 500 mA g -1 , the resultant TEFs still deliver a stable reversible discharge capacity of 875 mA h g -1 . This work demonstrates the extensive potential of such simple synthetic methods towards various carbon coated transition metal oxide composites for energy conversion and storage devices.

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