Article history: The Fe O -carbon ﬁber composites were prepared by a facile sol-gel method. The uniform distribu- 2 3 Received 6 May 2017 tion of Fe O grains on the surface of carbon ﬁbers was conﬁrmed by ﬁeld emission scanning electron 2 3 Received in revised form 10 July 2017 microscopy and transmission electron microscopy. The impact of the Fe O content in composite materi- 2 3 Accepted 8 August 2017 als on electrochemical performance was also investigated in this study. The results show that the capacity Available online 12 August 2017 degradation during cycling is associated with the content of Fe O in composite materials. Comparative 2 3 study of three composite samples with different Fe O contents revealed that the best electrochemical 2 3 Keywords: performance with good cycling stability, high reversible capacity and improved rate capability was exhib- Fe O @carbon ﬁber composites 2 3 −1 ited by the Fe O @carbon ﬁber sample. Even after 150 cycles at a constant current density of 50 mA g , a 2 3 Anode materials −1 high reversible discharge capacity of 634 mAh g can be achieved, which is comparable to its theoretical Lithium-ion batteries −1 value
Applied Surface Science – Elsevier
Published: Jan 1, 2018
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