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One-step Detonation-assisted Synthesis of Fe3O4-Fe@BCNTs Composite towards High Performance Lithium-ion Batteries

Abstract

Fe3O4-Fe@BCNTs composite was successfully synthesized via the detonation of a mixture of hexogen (C3H6N6O6) and ferrocene (C10H10Fe), in which bamboo-like carbon nanotubes encapsulating iron nanoparticles attached with Fe3O4 flakes (up to 58.1%) were formed. In the detonation process, hexogen was used to generate high temperature and high pressure, while ferrocene was used as carbon source and catalysts. The recovered Fe3O4-Fe@BCNTs composite was characterized by TEM, SEM, XRD, XPS, and Raman spectroscopy. The results indicate that the multi-walled carbon tubes with a bamboo-like structure are formed, in which iron nanoparticles are encapsulated. The length of multi-layered nanotubes (about 18-20 layers) is over 600 nm with a diameter range of 20-30 nm. The content of Fe3O4 flakes dispersed into carbon tubes is affected by the atomic ratio of C to Fe. In addition, the Fe3O4-Fe@BCNTs composite exhibits excellent electrochemical performance as anode materials in Li-ion batteries. The charge-discharge coulombic efficiency is up to 81.1% in the first cycle. After 100 cycles, the discharge capacity steadily increases up to nearly 800 mA h g−1 due to activation. The rate capability of Fe3O4-Fe@BCNTs composite is also excellent at current densities ranging from 100 to 2000 mA g-1.

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Publication details

The article was received on 22 Jul 2017, accepted on 24 Aug 2017 and first published on 31 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR05362B
Citation: Nanoscale, 2017, Accepted Manuscript
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    One-step Detonation-assisted Synthesis of Fe3O4-Fe@BCNTs Composite towards High Performance Lithium-ion Batteries

    L. Du, C. Xu, J. Liu, Y. Lan and P. Chen, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05362B

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