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

Authors: Xiang, Y., Wu, H., Zhang, K.H.L., Coto, M., Zhao, T., Chen, S., Dong, B., Lu, S., Abdelkader, A., Guo, Y., Zhang, Y., Ding, S., Xi, K., Gao, G.

Journal: Journal of Materials Chemistry A

Publication Date: 01/01/2017

Volume: 5

Issue: 17

Pages: 8062-8069

eISSN: 2050-7496

ISSN: 2050-7488

DOI: 10.1039/c7ta02136d

Abstract:

Hybrid carbon-coated transition metal oxides (TMOs@C) offer enhanced lithium storage capabilities, but the facile formation of TMOs@C nanocomposites remains a great challenge. Herein, we report a novel hierarchical hybrid nanostructure of carbon-coated CoFe2O4 twin elliptical frustums (CoFe2O4@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 CoFe2O4@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.

Source: Scopus