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

Yang Xiang, Hu Wu, Kelvin H. L. Zhang, Mike Coto, Teng Zhao, Sheng Chen, Bitao Dong, Shiyao Lu, Amr Abdelkader, Yuzhen Guo, Yanfeng Zhang, Shujiang Ding, Kai Xi, Guoxin Gao
  • Journal of Materials Chemistry A, January 2017, Royal Society of Chemistry
  • DOI: 10.1039/c7ta02136d

Carbon-coated cobalt–ferrite twin elliptical frustums for Lithium ion batteries

What is it about?

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.

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The following have contributed to this page: Kai Xi and Dr Amr M Abdelkader