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Issue 10, 2010
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A ferrocene-based carboniron lithium fluoride nanocomposite as a stable electrode material in lithium batteries

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Abstract

A nanocomposite comprising carboniron LiF was prepared by pyrolysis of a mixture of ferrocene and LiF at 700 °C under an argon atmosphere for 2 h. The structure and morphology of the material was characterized by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), BET analysis, and Mössbauer spectroscopy. The composite consists of multi-walled carbon nanotubes and onion-type graphite structures in which Fe and Fe3C nanoparticles are encapsulated, and LiF is dispersed within the carbon matrix. The sample contains both micro- (0.025 cm3 g−1) and mesopores (0.14 cm3 g−1), and has a total specific surface area of 82 m2 g−1. Its charge/discharge performances were studied in the potential range 0.5 V to 4.3 V at a current density of 20.83 mA g−1 at 25 °C. It exhibited an initial discharge capacity of 324 mAh g−1 with respect to the active mass of FeF3. After five cycles the capacity reached 280 mAh g−1 and is maintained at about 270 mAh g−1 over 200 cycles. A reversible specific capacity of about 170 mAh g−1 was realized when the potential range was between 1.3 and 4.3 V.

Graphical abstract: A ferrocene-based carbon–iron lithium fluoride nanocomposite as a stable electrode material in lithium batteries

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Publication details

The article was received on 15 Sep 2009, accepted on 05 Dec 2009 and first published on 15 Jan 2010


Article type: Paper
DOI: 10.1039/B919097J
Citation: J. Mater. Chem., 2010,20, 1871-1876
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    A ferrocene-based carboniron lithium fluoride nanocomposite as a stable electrode material in lithium batteries

    R. Prakash, A. K. Mishra, A. Roth, C. Kübel, T. Scherer, M. Ghafari, H. Hahn and M. Fichtner, J. Mater. Chem., 2010, 20, 1871
    DOI: 10.1039/B919097J

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