Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 644, Issue -, Pages 59-65Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.04.097
Keywords
Onion-like C; CoFe2O4; Anode material; Lithium-ion batteries
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Funding
- National Natural Science Foundation of China [51201002]
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In this work, core/shell structured CoFe2O4/onion-like C nanocapsules have been successfully fabricated by the arc discharge method and air-annealing process and confirmed by X-ray diffraction and high-resolution transmission electron microscopy. The core/shell structure effectively withstands the volume change of CoFe2O4 nanoparticles during the cycling process. Moreover, the onion-like C shells reduce the charge transfer resistance and facilitate electron and ion transport throughout the electrode. As a result, CoFe2O4/onion-like C nanocapsules exhibit excellent performance as a potential anode material for lithium ion batteries and deliver a reversible capacity of 914.2 mA h g(-1) at 0.1C, even after 500 cycles and recover its original capacity when the rate returns from 4C to the initial 0.1C after 120 cycles. (C) 2015 Elsevier B.V. All rights reserved.
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